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Journal articles on the topic 'Regenerative circulating heat exchanger'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Borsukiewicz-Gozdur, Aleksandra. "Exergy analysis of internal regeneration in supercritical cycles of ORC power plant." Archives of Thermodynamics 33, no. 3 (2012): 48–60. http://dx.doi.org/10.2478/v10173-012-0017-9.

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Abstract In the paper presented is an idea of organic Rankine cycle (ORC) operating with supercritical parameters and so called dry fluids. Discussed is one of the methods of improving the effectiveness of operation of supercritical cycle by application of internal regeneration of heat through the use of additional heat exchanger. The main objective of internal regenerator is to recover heat from the vapour leaving the turbine and its transfer to the liquid phase of working fluid after the circulation pump. In effect of application of the regenerative heat exchanger it is possible to obtain improved effectiveness of operation of the power plant, however, only in the case when the ORC plant is supplied from the so called sealed heat source. In the present paper presented is the discussion of heat sources and on the base of the case study of two heat sources, namely the rate of heat of thermal oil from the boiler and the rate of heat of hot air from the cooler of the clinkier from the cement production line having the same initial temperature of 260 oC, presented is the influence of the heat source on the justification of application of internal regeneration. In the paper presented are the calculations for the supercritical ORC power plant with R365mfc as a working fluid, accomplished has been exergy changes and exergy efficiency analysis with the view to select the most appropriate parameters of operation of the power plant for given parameters of the heat source.

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2

Yang, Wansheng, Lin Yang, Junjie Ou, Zhongqi Lin, and Xudong Zhao. "Investigation of Heat Management in High Thermal Density Communication Cabinet by a Rear Door Liquid Cooling System." Energies 12, no. 22 (2019): 4385. http://dx.doi.org/10.3390/en12224385.

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In this paper, a rear door oil-cooling heat exchanger for data center cabinet-level cooling has been proposed. In order to solve the heat dissipation problem of high heat density data center, this paper applied the mature transformer oil cooling technology to the data room. The heat dissipation of liquid-cooled cabinets and traditional air-cooled cabinets was compared, and the heat dissipation performance of the oil-cooled system was theoretically and experimentally investigated. To investigate the heat dissipation system, the cabinet operating temperature, circulating oil system temperature and cabinet exhaust temperature, cabinet heat density, oil flow rates and fan power were analyzed. It was found that the average cooling efficiency of the liquid-cooled cabinet increased by 66% compared with the average cooling efficiency of the conventional air-cooled cabinet. The operating temperature in air-cooled cabinets is as high as 55 °C, and the operating temperature in liquid-cooled cabinets does not exceed 50 °C. Among which, the maximum heat dissipation efficiency of the liquid-cooled cabinets can reach 58.8%. The oil temperature could reach 46.9 °C after heat exchange, and the exhaust air of the cabinet could reach 42.8 °C, which could be used to prepare domestic water and regenerative desiccant. The results from established calculation model agreed well with the testing results and the model could be used to predict the heat dissipation law of the oil cooling system under different conditions. The research has proposed the potential application of the oil-cooled in cabinet-level cooling, which can help realize saving primary energy and reducing carbon emission.

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3

Yao, Yingying, Xiaobo Wang, Zhongzhou Dou, Hang Wang, and Zeyang Li. "Design and feasibility verification of regenerative system of electric thermal storage boiler for peak shaving in summer in power plant." MATEC Web of Conferences 355 (2022): 02060. http://dx.doi.org/10.1051/matecconf/202235502060.

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During the heating period, the thermal storage electric boiler helps the thermal power units to participate in the deep peak regulation by converting the electric energy into heat energy for heating users, but in the non-heating period, the thermal storage electric boiler can not operate because there is no heat user, as a result, the thermal storage electric boiler is shut down in summer, and can not assist the thermal power unit to participate in the deep peak regulation. Therefore, this paper designs an electric thermal storage boiler regenerative system for peak shaving in summer. In this regenerative system, electric boiler is used to heat circulating water in heating period, and electric boiler is used to heat condensed water in non-heating period, and in the non-heating period, the number of low-pressure heaters can be adjusted according to the load and heat storage capacity of the units, so that the electric boiler can assist the thermal power units to participate in the deep peak regulation throughout the year, taking a 350MW unit with 70MW regenerative electric boiler as an example, the heat exchange capacity is calculated to verify the feasibility of the regenerative system. In this paper, a new method of heating condensate by regenerative electric boiler in non-heating period is proposed to solve the problem that the new energy can not be used and the energy is wasted in summer.

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4

Khudoykulov, Rustam Kuchkarovich. "USE OF LOW POTENTIAL SECONDARY HEAT ENERGY RESOURCES." Academic Research Journal 1, no. 6 (2022): 271–75. https://doi.org/10.5281/zenodo.7494652.

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5

Kaczmarczyk, Tomasz Z., and Eugeniusz Ihnatowicz. "The Experimental Investigation of Scroll Expanders Operating in the ORC System with HFE7100 as a Working Medium." Applied Mechanics and Materials 831 (April 2016): 245–55. http://dx.doi.org/10.4028/www.scientific.net/amm.831.245.

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The paper presents the results of experimental investigation on the ORC system with a droplet separator (which was used to improve the quality of working medium vapour) and two scroll expanders, which operated individually. The research aimed at verifying the correctness of scroll expanders performance in the ORC installation, equipped with the electric flow heater for thermal oil as a heat source. The paper contains the characteristics of the heat exchangers installation that were obtained for the ORC system variant using a regenerative cycle. The tests were conducted for selected flow rates and various temperatures of the working medium HFE7100, glycol solution and thermal oil. The unit with a gear pump and a magnetic coupling functioned as a circulating pump. Following the results of tests carried out on two scroll expanders it may be concluded that the electric power output that was measured at the generator terminals was approximately 750 W. The maximum voltages generated by the expanders amounted to around 200 V and the maximum current was about 4 A.

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6

Baranov, V. V., V. V. Barskov, and Y. V. Matveev. "500 kW closed cycle gas turbine unit with different working fluids." Safety and Reliability of Power Industry 17, no. 2 (2024): 137–43. http://dx.doi.org/10.24223/1999-5555-2024-17-2-137-143.

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This article considers a 500 kW closed cycle gas turbine unit. In contrast to open or semi-closed cycles, a closed cycle implies a working fluid circulating continuously within a closed loop. In other words, a working fluid (any working fluid) with the required initial parameters depending on the properties of the selected working fluid is injected into a closed circuit consisting of a compressor, heat exchangers of various purposes and a turbine. A unit with recirculation of combustion products at high pressure can be created based on existing units with minor modifications. Instead of emission into the atmosphere, the exhaust gases enter the high-temperature heat exchanger, where it gives heat to the closed-cycle gas turbine unit. First of all, the application of such units is relevant at compressor stations in conjunction with the gas turbine drive of the blower. The study involved thermal calculation of a closed-cycle gas turbine unit with different working fluids: carbon dioxide, helium and argon. The main objective is to study the advantages and disadvantages of alternative working fluids with their subsequent comparison. Since the main chemical and physical properties of alternative working fluids differ from the classical ones, there is a possibility of obtaining higher parameters of the unit. According to the results of calculations it is established that the most promising working fluid is carbon dioxide, because this can be used at a wide range of temperatures and pressures. It should also be noted that the consumption of carbon dioxide is the lowest compared to other working fluids. The efficiency of such an installation is 28%, but there is a possibility of improvement if regeneration is added.

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7

Chistov, A. S., O. G. Savikhin, and I. O. Savikhin. "NUMERICAL SIMULATION OF NON-STATIONARY PROCESSES IN THE GAS TURBINE CIRCUIT OF THE SSTAR LEAD-COOLED REACTOR." Problems of strenght and plasticity 82, no. 3 (2020): 339–52. http://dx.doi.org/10.32326/1814-9146-2020-82-3-339-352.

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The problem of mathematical and numerical modeling of non-stationary processes in a closed gas turbine installation as part of an energy conversion unit of a lead-cooled reactor is considered. The problem is solved in a fairly General formulation, in which the gas circuit can include an arbitrary number of turbines with gas preheating, an arbitrary number of compressors with gas pre-cooling, as well as a heat exchanger for regenerative gas heating. Variants of both single-shaft and two-shaft gas turbine installations are considered. Point idealization is used when modeling the flow part of the turbine and compressor. Heat and mass transfer in the circuits of lead and gas coolants is described in a one-dimensional approximation. The possibility of mutual phase transformations of a melt-solid phase in the lead coolant is taken into account. Calculation of heat and mass transfer in the circuits is carried out within the single approach, in which the circulation circuit is represented as a set of interconnected heat-hydraulic elements (channels). Integration of the system of heat and mass transfer equations in the contour is performed using a fast scalar sweeping algorithm. The calculation algorithm provides the ability to take into account the sources of impulse and mass at arbitrary nodal points of the contour. This makes it possible to “end-to-end” computation when integrating the system of equations of gas dynamics along a closed loop, taking into account changes in adiabatic pressure drops at the points of turbines and compressors at each time step. The possibility of using the integral form of the momentum equation for modeling heat and mass transfer in a gas circuit is considered. For the SSTAR-type reactor with a lead coolant and a gas-turbine energy conversion cycle, the calculation of an emergency process with a rupture of a hot gas pipeline was performed. It was found that, in contrast to a reactor with a steam-turbine cycle of energy conversion of the BREST type, lead solidification in gas heaters does not occur in this accident. The study results can be used in elaborating the designs of lead cooled reactors and high-temperature gas reactors.

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8

Kuryakova, Tatiana A., and Natalia G. Beregovaya. "Study on the nature of impurities in the circulating glycol solution at the installation of gas purification from acidic components." Butlerov Communications 62, no. 5 (2020): 51–57. http://dx.doi.org/10.37952/roi-jbc-01/20-62-5-51.

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Natural gas contains a large amount of moisture, which causes a lot of problems in its transportation and processing. In order to extract this moisture, natural gas gets subjected to the dewatering process, thereby reducing the moisture content and preventing further formation of hydrates. This is achieved by cleaning the gas from hydrogen sulfide and mercaptans and cooling in heat exchangers with the participation of a solution of monoethylene glycol. Together with gas, impurities come in the form of hydrocarbons, brine water, mechanical impurities, corrosion inhibitors, various SASs, resinous substances, etc. As a result of deposition of unwanted impurities on the internal surfaces of devices, the efficiency of mass exchange and heat exchange processes is reduced, equipment wear is increased, so is the laborious process of cleaning equipment during planned repairs, the temperature of the glycol block is disrupted and, as a result, the reagent consumption increases in order to maintain the necessary dewatering temperature of natural gas, and the waste of the glycol from the regeneration apparatus increases. The object of the study was the regeneration block of the saturated solution of monoethylene glycol. During the planned repairs of the plant, there was revealed significant contamination of the devices and heat exchange equipment of the glycol regeneration unit with a large number of unwanted impurities and sediments, as well as significant corrosion of pipe beams of heat exchangers and internal cavity of devices. We found that the most effective ways to prevent sediment formation in the monoethylene glycol regeneration unit are to better control the level of amine in the 374 B09 devices, to control the consumption of the amount of monoethylene glycol injected into heat exchangers, and to reduce the amount of impurities in the circulating solution of monoethylene glycol. Also, to reduce sediments in the heat exchange apparatus of the gas dewatering section, we recommend increasing the separation rate by installing jack elements in the 374 B09 separator and installing an additional filter in accordance with the proposed scheme, with a cartridge of polyphenylsulfide or fiberglass.

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9

Raths, Gunthe. "Regenerative flue gas heat exchanger." Journal of Heat Recovery Systems 6, no. 1 (1986): v. http://dx.doi.org/10.1016/0198-7593(86)90187-6.

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10

Rao, H. V. "Isentropic recuperative heat exchanger with regenerative work transfer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 214, no. 4 (2000): 609–18. http://dx.doi.org/10.1243/0954406001523948.

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A counter-flow heat exchanger is considered to be the ideal method for recuperative heat transfer between hot and cold fluid streams. In this paper the concept of an isentropic heat exchanger with regenerative work transfer is developed. The overall effect is a mutual heat transfer between the two fluid streams without any net external heat or work transfers. The effectiveness for an isentropic heat exchanger with regenerative work transfer is derived for the case of fluid streams with constant specific heats and it is shown that it is greater than unity. The ‘isentropic effectiveness’ of a heat exchanger is defined. The relationship between the entropy generation and effectiveness for the traditional heat exchanger is also examined and compared with that of the isentropic heat exchanger. The practical realization of isentropic operation of a heat exchanger and its possible application are briefly considered.

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11

Nizovtsev, M. I., V. N. Letushko, and V. Yu Borodulin. "Regenerative air heat exchanger with intermediate heat carrier." Journal of Physics: Conference Series 1105 (November 2018): 012109. http://dx.doi.org/10.1088/1742-6596/1105/1/012109.

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12

HAMAGUCHI, Kazuhiro. "Regenerative Heat Exchanger and Its Design Approach." TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 51, no. 8 (2016): 385–90. http://dx.doi.org/10.2221/jcsj.51.385.

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13

王, 明坤. "Design Method of Periodic Regenerative Heat Exchanger." Applied Physics 11, no. 12 (2021): 421–30. http://dx.doi.org/10.12677/app.2021.1112050.

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14

Monarkin, Nikolay, and Tat’yana Monarkina. "Experimental Research of a Regenerative Heat Exchanger." Processes 10, no. 1 (2022): 100. http://dx.doi.org/10.3390/pr10010100.

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Stationary switching regenerative heat exchangers (SSRHEs) are used for the ventilation of premises. The mathematical modeling of heat exchange between air and a regenerative nozzle is used to design the SSRHEs and determine their main parameters. The numerical solution of the proposed mathematical model has been experimentally tested for adequacy. The calculated and experimental values of the air temperature at the ends of the SSRHE are compared. It is determined that the proposed model is adequate and can be used in further research.

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15

Basok, B., and A. Timoshchenko. "HIGH TEMPERATURE COMPACT CERAMIC REGENERATIVE HEAT EXCHANGER." POWER ENGINEERING: economics, technique, ecology, no. 2 (December 27, 2019): 17–27. http://dx.doi.org/10.20535/1813-5420.2.2019.189990.

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16

Gat, Nahum. "The Circulating Balls Heat Exchanger (CIBEX)." Journal of Thermophysics and Heat Transfer 1, no. 2 (1987): 105–11. http://dx.doi.org/10.2514/3.12.

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17

Serov, A. A., and A. V. Tsygankov. "Comparing ways of calculation efficiency of regenerative heat exchanger." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 3 (2021): 39–44. http://dx.doi.org/10.25206/2588-0373-2021-5-3-39-44.

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This article contains information on various methods for calculating the efficiency of regenerative heat exchangers in an air ventilation system. The equations of heat balance and heat transfer are described. The results obtained on the CFD model are compared with the results obtained by various mathematical calculations. The obtained results of the computational study can give an assessment of the accuracy of computational methods to obtain the value of the efficiency of regenerative heat exchangers.

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18

Dostovalova, S. S., R. A. Serebryakov, S. G. Batukhtin, and A. G. Batukhtin. "Regenerative air-water heat exchanger with improved heat exchange ability." VESTNIK of the Samara State Aerospace University, no. 4(46) (December 31, 2014): 61. http://dx.doi.org/10.18287/1998-6629-2014-0-4(46)-61-66.

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19

Batukhtin, Sergey, Andrey Batukhtin, and Marina Baranovskaya. "Water-air regenerative heat exchanger with increased heat exchange efficiency." E3S Web of Conferences 295 (2021): 04005. http://dx.doi.org/10.1051/e3sconf/202129504005.

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According to experts’ forecasts, by 2040 the global demand for energy will increase by 37%, and renewable energy sources in the next 20 years will become the fastest growing segment of the world energy, their share in the next decade will grow by about one and a half times. Solar energy is the fastest growing industry among all non-conventional energy sources and is gaining the highest rates of development in comparison with other renewable energy sources. In this article, the authors provide an overview of the technologies that increase the efficiency and productivity of solar panels, only the investigated methods are described that can speed up the process of introducing solar energy instead of traditional. All the methods described can increase the efficiency of systems that are based on the use of the sun as the main source of energy. The authors presented and described the scheme of a solar-air thermal power plant, which will improve energy efficiency through the use of a regenerative air solar collector with increased heat transfer efficiency. Strengthening will be achieved through the use of hemispherical depressions on the surface that receives solar radiation. A schematic diagram is given and the principle of operation of such a solar collector is described in detail. A comparative calculation of the intensification of the solar collector with the use of depressions and without the use as modernization was carried out, on the basis of which a conclusion was made about the efficiency of using this type of solar collector and the economic effect from the application of this method. A description of the method for calculating the solar collector is given, thanks to which this development can be used and implemented in existing heating and hot water supply systems.

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20

Haryu, Eiji, Tomohiro Takayanagi, Yohei Kataoka, Shuichiro Kojima, and Naoki Mitsuta. "(Invited) Regenerative Fuel Cell System Utilizing a High Differential Pressure Water Electrolysis Technology." ECS Meeting Abstracts MA2023-01, no. 56 (2023): 2734. http://dx.doi.org/10.1149/ma2023-01562734mtgabs.

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The expansion of manned activities in space requires energy system technology that utilizes sunlight, and hydrogen fuel cells are one such means. By electrolyzing water with sunlight, energy is stored with oxygen and hydrogen, and electricity is generated by fuel cells. The generated water can be recycled, and energy can be stored and supplied without external replenishment. This is commonly called a regenerative fuel cell. In the space domain, such energy systems must be compact and lightweight, and gas must be stored under high pressure. However, mechanical compressors that are generally used for compressing are heavy, and there are also issues of vibration and noise. Since the 1990s, Honda has worked on the development of high-differential-pressure water electrolysis technology that generate hydrogen from renewable energy and compress without a mechanical compressor, in parallel with the development of fuel cell technology. High-differential-pressure water electrolysis is a technology that generates high pressure hydrogen by moving the protons generated by electrolysis to the cathode through the Proton exchange membrane (PEM) . The energy required is only the potential generated by the difference in hydrogen concentration, which is superior to small mechanical compressors whose efficiency is reduced by friction loss. However, a large differential pressure is generated across the PEM because only one side is at a high pressure. Honda has achieved a maximum pressure increase of 70 MPa by using its own structure. Moreover, this principle can be applied not only to the generation and pressurization of hydrogen, but also to oxygen. Honda is working on the development of RFC technology that integrates these hydrogen technologies with the aim of applying them not only to sustainability on Earth, but also to the space domain. Currently, we are undertaking a JAXA project and are promoting the production of a breadboard model. The feature of Honda's RFC technology is that it applies high-differential-pressure water electrolysis technology, not only to generate oxygen and hydrogen, but also to pressurize each gas. By not using a mechanical compressor, it is possible to downsize the system, and it is also no vibration or noise. Utilizing the characteristics of this technology, we are planning to build an energy system that can store energy at high density and apply it to various manned missions. Honda's RFC consists of the high-differential-pressure water electrolysis system that simultaneously electrolyzes water and pressurizes oxygen, a Electrochemical hydrogen compressor system (EHC system) that electrochemically pressurizes the hydrogen and a fuel cell system. In the electrolysis stack, oxygen is generated and compressed to the target pressure by the differential pressure water electrolysis. The generated hydrogen is sent to the EHC stack that also applies the technology of high-differential pressure water electrolysis, where the hydrogen is pressurized. As a result, both oxygen and hydrogen gases were generated and compressed without a mechanical compressor. For the fuel cell system, the compact and highly efficient fuel cell technology that has been developed for FCVs is applied. When the fuel cell is used on the ground, oxygen is supplied from the atmosphere, but in space RFC it is necessary to generate electricity using pure oxygen and to circulate the system. A dedicated circulating FC system was constructed to achieve stable power generation. The water produced by power generation is used in the next water electrolysis cycle, and the proof of principle as RFC has been completed. In addition to these basic functions, for space application, we must address issues not found on Earth, such as heat management in a vacuum, radiation, and vibrations during launch. Starting with the lunar exploration mission scheduled for 2030, Honda will develop this technology for the spread of manned activities. Figure 1

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21

Galle, M., D. W. Agar, and O. Watzenberger. "Thermal N2O decomposition in regenerative heat exchanger reactors." Chemical Engineering Science 56, no. 4 (2001): 1587–95. http://dx.doi.org/10.1016/s0009-2509(00)00386-9.

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22

Hill, A., and A. J. Willmott. "A robust method for regenerative heat exchanger calculations." International Journal of Heat and Mass Transfer 30, no. 2 (1987): 241–49. http://dx.doi.org/10.1016/0017-9310(87)90112-8.

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23

Backhaus, S., G. W. Swift, and R. S. Reid. "High-temperature self-circulating thermoacoustic heat exchanger." Applied Physics Letters 87, no. 1 (2005): 014102. http://dx.doi.org/10.1063/1.1988981.

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24

Li, Chung‐Hsiung. "The effect of longitudinal heat conduction on a regenerative heat exchanger." Journal of the Chinese Institute of Engineers 12, no. 1 (1989): 119–21. http://dx.doi.org/10.1080/02533839.1989.9677137.

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25

Kalnitsky, F. E., та A. V. Kostyukov. "Comparison of the analytical solutionof efficieтcy regenerative rotating heatexchangethe device with resultsof numericalcalculations". Izvestiya MGTU MAMI 12, № 3 (2018): 32–39. http://dx.doi.org/10.17816/2074-0530-66828.

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The article is devoted to the thermal-hydraulic calculation of the rotating heat exchanger of a gas turbine engine. More specifically, the purpose of this work is to determine the error of the known analytical calculation of the efficiency of the regenerative heat exchanger in comparison with numerical calculation. Analytical and numerical calculations of the rotating heat exchanger are performed. The main problem of creating a methodology for the analytical solution of processes occurring in rotating heat exchangers is that it is necessary to solve the problem of non-stationary heat transfer from the hot coolant to the coolant through the regenerator packing. The solution of any non-stationary process of heat transfer requires knowledge of the boundary and initial conditions of the process. As initial conditions, it is necessary to use the dependence of the regenerator packing temperature field on the steady state of its operation. Such a relationship can only be obtained after the calculation is completed. In this case, the solution of the heat transfer problem in a rotating heat exchanger is possible using two methodological approaches. The first possibility is a solution by successive approximations. In addition to the fact that such a technique is very time-consuming, it allows us to obtain only a numerical solution of the problem, the possibilities of analysis are limited. The second possibility is the use of one or several assumptions. Such an analytical solution was obtained by Stepanov G.Yu. It is clear that the use of assumptions in analytical analysis or in analytical calculations requires an assessment of the accuracy of the methodology. An estimate of the accuracy of the analytical solution to the efficiency of a rotating heat exchanger is given in the proposed work. It is shown that the error of the analytical solution of the regenerator efficiency in the zone of high regeneration degree values is insignificant in comparison with numerical calculations. Analytical solutions proposed by Stepanov G.Yu., are accessible and effective in the process of creating regenerators. Of particular importance are analytical calculations of the efficiency of regenerators when recording solutions in the form required by the similarity theory. An increase in the error in the analytical calculation of the efficiency of the regenerator is noted with a decrease in the ratio of the water equivalents of the heat-transfer packing of the rotating heat exchanger and coolants (gas and air). Marked increase of error of the analytical calculation of the effectiveness of the Regener-Torah in the decrease of water equivalent heat transfer gaskets. no-return heat exchanger and coolants (gas and air).

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26

Wenqiang, Cui. "Up-Tube Heat Exchanger Engineering Design and Heat Transfer Analysis." Journal of Industry and Engineering Management 1, no. 1 (2023): 88–91. http://dx.doi.org/10.62517/jiem.202303113.

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In the coking process, a large amount of 750℃-800℃ coke-oven gas is produced, and the traditional process is to use circulating water spray to cool the coke-oven gas instantly to 80-90℃, and the sensible heat of the coke-oven gas is wasted. In order to recover sensible heat of coke-oven gas reliably and stably, this paper puts forward a kind of uptube heat exchanger for sensible heat recovery of coke-oven gas based on the problems existing in the past heat exchanger and the characteristics of coke-oven gas itself, and analyzes the heat transfer process equation of heat exchanger.

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27

Baruah, Netramoni, and Kumar G. V. Prasanna. "Numerical Modeling of Regenerative Rotary Heat Exchanger: A Review." Journal of Biosystems Engineering 42, no. 1 (2017): 44–55. http://dx.doi.org/10.5307/jbe.2017.42.1.044.

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28

Atthey, D. R. "An approximate thermal analysis for a regenerative heat exchanger." International Journal of Heat and Mass Transfer 31, no. 7 (1988): 1431–41. http://dx.doi.org/10.1016/0017-9310(88)90252-9.

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29

Guo, Zhimin, and Shaowei Zhu. "Regenerative effect of heat exchanger in pulse tube refrigerator." International Journal of Refrigeration 118 (October 2020): 114–20. http://dx.doi.org/10.1016/j.ijrefrig.2020.04.016.

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30

Toritsyn, L. N. "Quality requirements of a regenerative heat exchanger poured checkerwork." Refractories 31, no. 7-8 (1990): 415–21. http://dx.doi.org/10.1007/bf01281554.

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31

Yoo, I. S., V. P. Kovalevski, and S. Y. Kim. "Numerical investigation of flowing processes for regenerators of transport gas turbine units." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 3 (2003): 299–309. http://dx.doi.org/10.1243/095765003322066529.

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A distributed nonlinear mathematical model for investigation of regenerative heat exchangers of both rotating-matrix and fixed-matrix is described. A noniterative numerical integration scheme for a conjugate unsteady heat exchange problem of one-dimensional flow and two-dimensional wall conduction is developed. An example study of a regenerative heat exchanger with a rotary ceramic matrix is presented. The range of optimum rotation rates supplying the highest calorific efficiency to the regenerator is determined.

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32

Shatskikh, Yu V., A. I. Sharapov, A. G. Arzamassev, and Yu A. Geller. "Optimization of the operation mode of regenerative heat exchangers." Journal of Physics: Conference Series 2119, no. 1 (2021): 012156. http://dx.doi.org/10.1088/1742-6596/2119/1/012156.

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Abstract The paper considers the operation of regenerative heat exchangers with a fixed checkerwork. Such a checkerwork allows for high-temperature heating of gases and is made of refractory materials with a relatively high heat capacity, but low thermal conductivity. The article presents calculations of regenerative heat transfer for devices with block checkerwork. It is shown that a decrease in the equivalent diameter of the channel d e leads to an increase in the average air heating temperature over the period. An increase in the relative water section of the checkerwork f also leads to an increase in the air heating temperature, but only to a certain limit. On the one hand, with an increase in the relative water section, the specific heat exchanger surface increases. On the other hand, at a certain value f, the accumulating mass of the checkerwork significantly decreases, and as a result, the air heating temperature decreases. For the same reason, for checkerwork with a high value of the relative water section, it is necessary to reduce the duration of the heating/cooling periods of the checkerwork. The paper also examines several types of compact checkerwork, which are very promising, including in heat storage systems. It is noted that the use of such attachments in conventional regenerate heat exchangers is impossible. First, it is necessary to increase the water section of the heat exchanger and significantly reduce its height, otherwise, the pressure loss will increase sharply. Secondly, it is necessary to significantly reduce the duration of the heating/cooling periods, otherwise, due to more intense heat exchange, the air temperature at the outlet of the regenerative heat exchanger changes much more than in the block checkerwork.

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33

B Carlson, Franklin, and RobertN Hall. "Circulating bed heat exchanger for cooling shale ash." Journal of Heat Recovery Systems 6, no. 1 (1986): vi. http://dx.doi.org/10.1016/0198-7593(86)90190-6.

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Swift, G. W., and S. Backhaus. "A resonant, self-pumped, circulating thermoacoustic heat exchanger." Journal of the Acoustical Society of America 116, no. 5 (2004): 2923–38. http://dx.doi.org/10.1121/1.1804634.

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35

Kilkovský, Bohuslav. "Review of Design and Modeling of Regenerative Heat Exchangers." Energies 13, no. 3 (2020): 759. http://dx.doi.org/10.3390/en13030759.

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Heat regenerators are simple devices for heat transfer, but their proper design is rather difficult. Their design is based on differential equations that need to be solved. This is one of the reasons why these devices are not widely used. There are several methods for solving them that were developed. However, due to the time demands of calculation, these models did not spread too much. With the development of computer technology, the situation changed, and these methods are now relatively easy to apply, as the calculation does not take a lot of time. Another problem arises when selecting a suitable method for calculating the heat transfer coefficient and pressure drop. Their choice depends on the type of packed bed material, and not all available computational equations also provide adequate accuracy. This paper describes the so-called open Willmott methods and provides a basic overview of equations for calculating the regenerative heat exchanger with a fixed bed. Based on the mentioned computational equations, it is possible to create a tailor-made calculation procedure of regenerative heat exchangers. Since no software was found on the market to design regenerative heat exchangers, it had to be created. An example of software implementation is described at the end of the article. The impulse to create this article was also to broaden the awareness of regenerative heat exchangers, to provide designers with an overview of suitable calculation methods and, thus, to extend the interest and use of this type of heat exchanger.

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36

Collings, Mckeown, Wang, and Yu. "Experimental Investigation of a Small-Scale ORC Power Plant Using a Positive Displacement Expander with and without a Regenerator." Energies 12, no. 8 (2019): 1452. http://dx.doi.org/10.3390/en12081452.

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While large-scale ORC power plants are a relatively mature technology, their application to small-scale power plants (i.e., below 10 kW) still encounters some technical challenges. Positive displacement expanders are mostly used for such small-scale applications. However, their built-in expansion ratios are often smaller than the expansion ratio required for the maximum utilisation of heat sources, leading to under expansion and consequently higher enthalpy at the outlet of the expander, and ultimately resulting in a lower thermal efficiency. In order to overcome this issue, one possible solution is to introduce an internal heat exchanger (i.e., the so-called regenerator) to recover the enthalpy exiting the expander and use it to pre-heat the liquid working fluid before it enters the evaporator. In this paper, a small-scale experimental rig (with 1-kW rated power) was designed and built that is capable of switching between regenerative and non-regenerative modes, using R245fa as the working fluid. It has been tested under various operating conditions, and the results reveal that the regenerative heat exchanger can recover a considerable amount of heat when under expansion occurs, increasing the cycle efficiency.

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37

Tunggul Ismail, Alwinsyah, Ismail Ismail, and Reza Abdu Rahman. "Increasing the reliability of biomass solid fuel combustion using a combined regenerative heat exchanger as an indirect burner." Eastern-European Journal of Enterprise Technologies 5, no. 8(119) (2022): 53–61. http://dx.doi.org/10.15587/1729-4061.2022.265803.

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In this study, an indirect burner system for solid biomass fuel is designed. The design is motivated by the need to solve the problem related to a direct burner system, such as slagging and high pollutant emissions due to the high-temperature burning process. Therefore, the utilization of an indirect burner is expected to improve the reliability of the solid biomass combustion process. It also can be used to reduce coal consumption by using an indirect burner where the working fluid reaches a relatively higher temperature before entering the boiler. The design used the first principle method for creating the regenerator heat exchanger. The regenerator consists of a mantle and coil heat exchanger. The test used solid biomass fuel for the combustion process where the working fluid first enters the mantle heat exchanger and then the coil heat exchanger. As a result, the mantle absorbs sufficient heat losses from the combustion chamber with the highest temperature increment of 19 °C. The warm water from the mantle then flows to the coil arrangement within the combustion chamber. As a result, the highest temperature of the coil is 84.5 °C. The heat transfer rate for the coil and mantle is 57.2–85.6 and 124.9–141.5 W. The key finding is that the combined regenerative heat exchanger can deliver a higher transfer rate. This can be achieved since the heat exchanger utilizes the same flow distribution, increasing the mean temperature differences at the inlet. Thus, it can produce an average heat transfer rate of 210.5 W. Therefore, energy consumption for coal or other fossil fuels can be reduced significantly. The data can be used for further improvement of the existing boiler system and help to increase the thermal efficiency of the system.

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38

Alwinsyah, Tunggul Ismail, Ismail Ismail, and Abdu Rahman Reza. "Increasing the reliability of biomass solid fuel combustion using a combined regenerative heat exchanger as an indirect burner." Eastern-European Journal of Enterprise Technologies 5, no. 8(119) (2022): 53–61. https://doi.org/10.15587/1729-4061.2022.265803.

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In this study, an indirect burner system for solid biomass fuel is designed. The design is motivated by the need to solve the problem related to a direct burner system, such as slagging and high pollutant emissions due to the high-temperature burning process. Therefore, the utilization of an indirect burner is expected to improve the reliability of the solid biomass combustion process. It also can be used to reduce coal consumption by using an indirect burner where the working fluid reaches a relatively higher temperature before entering the boiler. The design used the first principle method for creating the regenerator heat exchanger. The regenerator consists of a mantle and coil heat exchanger. The test used solid biomass fuel for the combustion process where the working fluid first enters the mantle heat exchanger and then the coil heat exchanger. As a result, the mantle absorbs sufficient heat losses from the combustion chamber with the highest temperature increment of 19 °C. The warm water from the mantle then flows to the coil arrangement within the combustion chamber. As a result, the highest temperature of the coil is 84.5 °C. The heat transfer rate for the coil and mantle is 57.2–85.6 and 124.9–141.5 W. The key finding is that the combined regenerative heat exchanger can deliver a higher transfer rate. This can be achieved since the heat exchanger utilizes the same flow distribution, increasing the mean temperature differences at the inlet. Thus, it can produce an average heat transfer rate of 210.5 W. Therefore, energy consumption for coal or other fossil fuels can be reduced significantly. The data can be used for further improvement of the existing boiler system and help to increase the thermal efficiency of the system.

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39

Kupreenko, Aleksey, Khafiz Isaev, Stanislav Mikhailichenko, et al. "HEAT BALANCE OF COMBINED HEAT EXCHANGER AERODYNAMIC HEATING DRYERS." Advanced Engineering Letters 1, no. 3 (2022): 80–87. http://dx.doi.org/10.46793/adeletters.2022.1.3.2.

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Today, the use of aerodynamic dryers for drying various types of fruit crops is very current. In them, the electric energy spent on the drive of the centrifugal fan is transformed into thermal energy due to the mutual friction of the air flows circulating in the closed chamber. In order to increase the energy efficiency of the drying process, the heat of the waste drying agent was used in the research. The presented dryer was equipped with a combined heat exchanger. In order to predict the thermal performance of the combined heat exchanger depending on external factor variables, the dependence of the temperature of the fresh drying agent at the outlet of the combined heat exchanger on the dryer operation time is theoretically determined on the basis of the heat balance equation. The air solar collector in the combined heat exchanger made it possible to increase the temperature of the drying agent at the outlet by another 10oC without extra costs of electrical energy. A comparative analysis of the results of experimental and theoretical studies showed their high convergence.

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Dzianik, František, Štefan Gužela, and Eva Puškášová. "Suitability Assessment of Two Types of Heat Exchangers for High Temperature, Naturally Circulating Helium Cooling Loop." Strojnícky casopis – Journal of Mechanical Engineering 69, no. 1 (2019): 39–50. http://dx.doi.org/10.2478/scjme-2019-0003.

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AbstractThe paper presents a comparison of the process properties of two types of the heat exchangers designed for the heat removal from a high temperature helium cooling loop with steady natural circulation of helium. The first considered heat exchanger is a shell and tube heat exchanger with U-tubes and the other one is a helical coil heat exchanger. Using the thermal and hydrodynamic process calculations, the thermal performance of the two alternative heat exchangers are determined, as well as the pressure drops of flowing fluids in their workspaces. The calculations have been done for several defined operating conditions of two considered types of heat exchangers. The operating conditions of heat exchangers correspond to the certain helium flow rates.

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41

Aktershev, S. P., I. V. Mezentsev, and N. N. Mezentseva. "The regenerative heat exchanger with periodic veering of the flow." Journal of Physics: Conference Series 1382 (November 2019): 012125. http://dx.doi.org/10.1088/1742-6596/1382/1/012125.

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42

SCHPIELRAIN, E., D. PINCHASIK, O. GORSHUNOV, et al. "Non-catalytic conversion of methane in a regenerative heat exchanger." Journal of Heat Recovery Systems 5, no. 5 (1985): 419–23. http://dx.doi.org/10.1016/0198-7593(85)90173-0.

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43

Chang, Ho-Myung, and Seung Hoon Ryu. "Heat exchanger for subcooling liquid nitrogen with a regenerative cryocooler." Cryogenics 51, no. 3 (2011): 132–38. http://dx.doi.org/10.1016/j.cryogenics.2010.12.010.

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44

Chang, Ho-Myung, and Kyung Hyun Gwak. "New application of plate–fin heat exchanger with regenerative cryocoolers." Cryogenics 70 (September 2015): 1–8. http://dx.doi.org/10.1016/j.cryogenics.2015.04.005.

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45

Chang, Chih-Chung, Jyun-De Liang, and Sih-Li Chen. "Performance investigation of regenerative total heat exchanger with periodic flow." Applied Thermal Engineering 130 (February 2018): 1319–27. http://dx.doi.org/10.1016/j.applthermaleng.2017.11.024.

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46

KUPREENKO, ALEKSEI I., VLADIMIR F. KOMOGORZEV, HAFIZ M. ISAEV, and SAMIR KH ISAEV. "HEAT BALANCE OF COMBINED HEAT EXCHANGER USED IN AERODYNAMIC HEATING DRYERS." AGRICULTURAL ENGINEERING, no. 6 (2020): 66–73. http://dx.doi.org/10.26897/2687-1149-2020-6-66-73.

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One of the promising methods of drying raw fruit and berry materials is the use of aerodynamic heating dryers that transform electric energy spent on a centrifugal fan drive into heat energy due to the mutual friction of air fl ows circulating in a closed chamber. To reduce the energy intensity of the drying process, the authors propose to utilize the heat of the used drying agent by equipping the dryer with a combined heat exchanger. To predict the thermotechnical characteristics of the combined heat exchanger depending on variable external factors, based on the heat balance equation, the authors determined the theoretical relationship between the drying agent temperature at the outlet of the combined heat exchanger and the dryer operating time. The presence of an air solar collector in the combined heat exchanger allowed increasing the temperature of the drying agent at the outlet by another 10°C without additional electric energy costs. A comparative analysis of the results of experimental and theoretical studies has shown their high convergence.

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47

Obstawski, Paweł, Tomasz Bakoń, and Anna Kozikowska. "Influence of circulating pump efficiency on the heat exchange process in a plate heat exchanger used in a solar heating installation." E3S Web of Conferences 154 (2020): 05008. http://dx.doi.org/10.1051/e3sconf/202015405008.

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In solar heating systems with an absorber area of more than 20 m2, a plate heat exchanger is used as a separator between the primary glycol-based refrigerant and secondary water. The use of a plate heat exchanger enables an increase in the heat exchange area compared to the standard coil heat exchangers located inside the domestic hot water tank. An important problem is to determine the volume flow rate on both the primary and secondary side of the exchanger. The paper presents an analysis of the influence of the circulation pump efficiency on the primary and secondary side of the heat exchanger installed in a solar heating installation on the intensity of the heat exchange process.

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48

Kostyukov, A. V., and A. A. Dementyev. "High Temperature Rotary Heat Exchanger for Gas Turbine and Gyratory Engines." Izvestiya MGTU MAMI 5, no. 2 (2011): 23–27. http://dx.doi.org/10.17816/2074-0530-69830.

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The article includes the results of the calculated and experimental study of the thermal state of the rotary frame heat exchanger with conical and cylindrical heat transfer elements. Calculations were carried out in the program complex ANSYS CFX, and the experiment on the regenerative gas turbine engine of GAZ Automotive Plant.

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MONARKIN, Nikolay N., Sergey V. LUKIN, and Aleksandr A. KOCHKIN. "INFLUENCE OF GEOMETRIC, THERMOPHYSICAL AND OPERATING PARAMETERS ON THERMAL EFFICIENCY OF REGENERATIVE HEAT EXCHANGER." Urban construction and architecture 9, no. 4 (2019): 33–38. http://dx.doi.org/10.17673/vestnik.2019.04.6.

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The influence of geometric (length, diameter and wall thickness of a unit equivalent channel of the nozzle), thermophysical (density and heat capacity of the nozzle material) and operating parameters (air flow through the regenerator and the time of one stage of accumulation / regeneration of thermal energy) on the thermal efficiency of stationary switching regenerative heat exchangers was studied . It was revealed that by varying the length and diameter of the channel and air flow, it is possible to increase thermal efficiency up to 10%. It was found that the wall thickness of a single channel, the density and heat capacity of the material of the nozzle, as well as the time of one stage, slightly aff ect the thermal efficiency of the regenerative heat exchanger.

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50

Ji, Yuxuan, Kaixiang Xing, Kefa Cen, Mingjiang Ni, Haoran Xu, and Gang Xiao. "Numerical Study on Flow and Heat Transfer Characteristics of Trapezoidal Printed Circuit Heat Exchanger." Micromachines 12, no. 12 (2021): 1589. http://dx.doi.org/10.3390/mi12121589.

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Printed circuit heat exchanger (PCHE) is a promising regenerative device in the sCO2 power cycle, with the advantages of a large specific surface area and compact structure. Its tiny and complex flow channel structure brings enhanced heat transfer performance, while increasing pressure drop losses. It is, thus, important to balance heat transfer and flow resistance performances with the consideration of sCO2 as the working agent. Herein, three-dimensional models are built with a full consideration of fluid flow and heat transfer fields. A trapezoidal channel is developed and its thermal–hydraulic performances are compared with the straight, the S-shape, and the zigzag structures. Nusselt numbers and the Fanning friction factors are analyzed with respect to the changes in Reynolds numbers and structure geometric parameters. A sandwiched structure that couples two hot channels with one cold channel is further designed to match the heat transfer capacity and the velocity of sCO2 flows between different sides. Through this novel design, we can reduce the pressure drop by 75% and increase the regenerative efficiency by 5%. This work can serve as a solid reference for the design and applications of PCHEs.

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