Relevant bibliographies by topics / Inter-Cooler

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Inter-Cooler'

Author: Grafiati
Published: 11 September 2021
Last updated: 18 February 2022

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Journal articles on the topic "Inter-Cooler"

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Zheng, Hui-Fan, Xiao-Wei Fan, Guo-Ji Tian, Lei Liu, and Yin-Long Chen. "Inter-cooler in solar-assisted refrigeration system: Theory and experimental verification." Thermal Science 19, no. 4 (2015): 1379–82. http://dx.doi.org/10.2298/tsci1504379z.

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An inter-cooler in the solar-assisted refrigeration system was investigated experimentally and theoretically, and the theoretical prediction was fairly in good agreement with the experimental data. The influence of pipe diameter, tooth depth, and spiral angle of inter-cooler on the performance of the refrigerant system was analyzed. It was concluded that heat transfer is influenced deeply by the structure parameters of inter-cooler, and the heat transfer capacity increases with tooth depth and spiral angle increasing, and decreases with tooth apex angle increasing.
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TANIDA, Koji, Shu Liang ZHOU, Yu HIRESAKI, Jin Lin GAO, and Yoichi MATSUBARA. "Thermoacoustic Cryocooler. The Development of an Inter-phasing Pulse-tube Cooler." TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 33, no. 4 (1998): 189–93. http://dx.doi.org/10.2221/jcsj.33.189.

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Zhang, Xiao-bin, Zhi-hua Gan, Li-min Qiu, and Hua-xiang Liu. "Computational fluid dynamic simulation of an inter-phasing pulse tube cooler." Journal of Zhejiang University-SCIENCE A 9, no. 1 (January 2008): 93–98. http://dx.doi.org/10.1631/jzus.a071259.

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Purohit, Nilesh, Dileep Kumar Gupta, and Mani Sankar Dasgupta. "Effect of Inter-stage Pressure on the Performance of a Two Stage Refrigeration Cycle Using Inter Cooler." Energy Procedia 90 (December 2016): 171–78. http://dx.doi.org/10.1016/j.egypro.2016.11.182.

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Justin Dhiraviam, F., V. Naveen Prabhu, T. Suresh, and C. Selva Senthil Prabhu. "Improved Efficiency in Engine Cooling System by Repositioning of Turbo Inter Cooler." Applied Mechanics and Materials 787 (August 2015): 792–96. http://dx.doi.org/10.4028/www.scientific.net/amm.787.792.

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Turbochargers are an integral part of today’s modern diesel engines and are a major reason that they are able to produce more power. Unlike a super charger that is driven via a belt from the engine, a turbo takes the exhaust that the engine is producing and puts it to good use. As Turbochargers are driven by exhaust, heat is an unwelcome by product and something that wasn’t really taken into account in automobiles. Then those intercoolers started to come into play in turbocharged automobiles. The forced air produced by the turbocharger is routed through the intercooler where its temperature is reduced before reaching the engine. The use of intercoolers has made turbocharged vehicles far more reliable and, in the case of today’s heavy duty diesel trucks, is a very important component. The inlet air of an IC engine from turbocharger temperature is very much high (due to compression) means oxygen content is very much less. And also air with high temperature causes pre-ignition and detonation. So fuel combustion does not take place properly. Inter Cooling of inlet air is very much essential according to performance point of view. Turbo intercoolers are used for cooling the inlet air of an IC engine from turbo chargers. Moreover cooling of air makes it denser and contributes for better combustion and more power they are mounted close to the radiators for achieving lower air temperature. This arrangement affects the performance of both. So in this project an attempt will be made to increase the efficiency of the turbo intercooler arrangement through design modification and repositioning of intercooler by taking the TATA MARCOPOLO-Star Bus 909 as a reference.
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Yoo, Sun-Il, Seung-Taek Oh, Ho-Saeng Lee, Jung-In Yoon, Keun-Hyung Choi, and Sang-Gyu Lee. "Effect of Two staged Inter-cooler on Efficiency of LNG Liquefaction Process." Journal of the Korean Society of Marine Engineering 34, no. 1 (January 31, 2010): 46–52. http://dx.doi.org/10.5916/jkosme.2010.34.1.046.

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Yari, M. "Second law optimization of two-stage transcritical CO2 refrigeration cycles in the cooling mode operation." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 223, no. 5 (May 8, 2009): 551–61. http://dx.doi.org/10.1243/09576509jpe682.

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Second law optimization studies of two-stage transcritical CO2 (TRCC) refrigeration cycles, incorporating options such as a new ejector-expansion with internal heat exchanger (IHE) and intercooler (IC), flash gas bypass, flash gas intercooling, compressor intercooling with IHE, are presented based on cycle simulation. To validate the simulations, the available numerical data in open literature are used. It is found that the coefficient of performance (COP) and second law efficiency of the new two-stage TRCC cycle are on average 16.5, 18.4, and 28.4 per cent higher than that of the two-stage TRCC with IHE and IC, the two-stage TRCC with flash gas bypass, and the two-stage TRCC with flash gas intercooling cycles, respectively. Hence, the new two-stage refrigeration cycle is a promising refrigeration cycle from the thermodynamic point of view. It is also concluded that for cases of the flash gas bypass and flash gas intercooling the optimum inter-stage pressure deviates significantly from the geometric mean pressure of the gas cooler and evaporator pressure. While for the new two-stage TRCC and the two-stage TRCC with IHE and IC, the optimum inter-stage pressure is approximately equal to geometric mean pressure. Finally, a regression analysis was employed in terms of evaporator and gas cooler exit temperatures to develop mathematical expressions for maximum COP, optimum discharge, and inter-stage pressures and entrainment ratio.
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Korb, Reinhard. "Modeling and Nonlinear Controller Design for the Inter-Cooler in a Turbo Combustion Engine Power Plant." IFAC Proceedings Volumes 32, no. 2 (July 1999): 7438–43. http://dx.doi.org/10.1016/s1474-6670(17)57269-9.

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Terai, Yuzo. "B209 The triple combined cycle of Brayton-cycle, Rankine-cycle and Reciprocating-engine that has humidifying-inter-cooler." Proceedings of the National Symposium on Power and Energy Systems 2008.13 (2008): 341–44. http://dx.doi.org/10.1299/jsmepes.2008.13.341.

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Deng, Yipan, Na Miao, Yinshui Liu, Xiaomin Zhai, and Defa Wu. "Investigation on cooling efficiency of a 3D-printed integrated inter cooler applicable to a miniature multi-stage compressor." International Journal of Refrigeration 100 (April 2019): 295–306. http://dx.doi.org/10.1016/j.ijrefrig.2019.02.012.

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Dissertations / Theses on the topic "Inter-Cooler"

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Oliveira, Tiago Cardoso. "O Turbo Compressor como elemento de redução de emissões de gases de escape." Master's thesis, 2014. http://hdl.handle.net/10400.6/6197.

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Desde o desenvolvimento do primeiro motor de combustão interna até aos dias de hoje tem havido um forte interesse em reduzir os consumos de combustível. O consequente aumento do preço dos combustíveis leva a que os engenheiros tenham que se empenhar em reduzir os consumos de combustível dos motores dos automóveis e não só, em todos os transportes públicos acionados por motores de combustão interna, sejam Diesel ou gasolina. Neste estudo, vamos analisar dois motores de combustão interna: um motor aspirado (sem turbocompressor) e um motor sobrealimentado (com turbocompressor). Para a realização destes dois testes, usamos um banco de ensaios para o motor aspirado e um programa de simulação chamado Engine Analyser Pro v3.3 para o motor sobrealimentado, visto que não houve hipóteses de fazer este teste fisicamente devido a não existência do motor em questão num banco de ensaios. O estudo consiste na comparação dos consumos, potências e binários entre estes dois motores. Os resultados obtidos neste estudo vão mostrar que os motores sobrealimentados são mais económicos no consumo e mais eficientes, dado que é possível extrair mais potência, mais binário de um bloco sobrealimentado do que um que não é sobrealimentado. Num dos capítulos finais vamos fazer referência à questão das emissões dos gases, falando sobre as normas atuais e as previsões para o futuro. A emissão dos gases de escape é um tema atual e em constante mudança para melhorar a questão da poluição atmosférica que tem tido um impacto negativo na nossa natureza.
Since the development of the first internal combustion engine to this days has been a strong interest in reducing fuel consumption. The consequent increase in the price of fuel means that the engineers have to strive to reduce the fuel consumption of the engines of cars and not only, in all public transport powered by internal combustion engines, whether Diesel or petrol. In this study, we will examine two internal combustion engines: an engine aspirated (without turbocharger) and a supercharged engine (with turbocharger). For the achievement of these two tests, we used a test bench for motor aspirated and a program called Simulation Engine Analyzer Pro v 3.3 supercharged engine, since there was no chance of doing this test physically due to non-existence of the engine in question on a test bench. The study consists in the comparison of consumption, and binary power between these two engines. The results obtained in this study will show that turbocharged engines are more economical in consumption and more efficient, since it is possible to extract more horsepower, more torque for a block supercharged than one that is not supercharged. In one of the final chapters we will reference the issue of greenhouse gas emissions, talking about current standards and predictions for the future. The emission of exhaust gases is a current topic and constantly changing to improve the issue of air pollution which has had a negative impact on our environment.
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Book chapters on the topic "Inter-Cooler"

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Richard, Birgit. "Inter-Cooler Style – Jugend und Museum." In Das Museum als Lern- und Erfahrungsraum, 89–95. Köln: Böhlau Verlag, 2012. http://dx.doi.org/10.7788/boehlau.9783412215828.89.

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Sorenson, Eric J. "Sensory Nerve Conduction Studies." In Clinical Neurophysiology, 292–311. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190259631.003.0018.

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Sensory nerve action potentials (SNAPs) are an important component of an electrodiagnostic test of peripheral nerves and can localize lesions either proximal or distal to the dorsal root ganglia. They are among the most sensitive measures of peripheral nerve dysfunction, and can provide information about the pathophysiology of the neuropathy, suggesting demyelination or axonal loss in some cases. Because SNAPs are much smaller than compound muscle action potentials, they are technically more difficult to study. Temperature will have a greater impact on SNAPs than motor potentials, with cooler limb temperatures leading to longer latencies, slower conduction velocities, and larger amplitudes. Responses are commonly averaged 3 to 5 times to minimize the effect of the background noise on the waveforms. Distance from the electrical generator and inter-electrode distance will also impact the appearance and size of the nerve potential waveform. This chapter reviews the concepts and applications of sensory nerve action potentials and sensory nerve conduction studies.
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Banak, Adriano, Oleg Mandic, Davor Pavelić, Marijan Kovačić, and Fabrizio Lirer. "Pleistocene Climate Change in Central Europe." In Pleistocene Archaeology - Migration, Technology, and Adaptation. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93820.

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Loess is terrestrial, clastic sediment formed by the accumulation of wind-blown dust. It is usually inter–bedded with paleosol horizons, forming loess-paleosol successions (LPS). Due to their characteristics LPS’s represent valuable records of climate changes during Pleistocene. The thickest LPS sections in Croatia are in the Baranja region. Stable oxygen (δ18O) and carbon (δ13C) isotope analysis were made on loess malacofauna in order to quantify paleo-temperature changes and describe paleo-vegetation in this part of Central Europe. δ18O values show significant paleotemperature changes during the Upper Pleistocene (130 ky - 20 ky) in Baranja region. Average growing season (AGS) temperature varied 13.2 °C or 9.5 °C during that time period, depending on which formula is applied for calculations. Magnetic susceptibility (MS) measurements show strong peaks in the paleosol horizons pointing to more humid climate. The overall climate was much cooler then present. Stable carbon isotope values point to dominance of C3 vegetation type during the Late Pleistocene in southern part of Central Europe. Climate change in the Late Pleistocene is very likely a significant but not the only factor that influenced the extinction of Neanderthal population which paved the way for the dominance of anatomically modern humans (AMH) in Central Europe.
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Conference papers on the topic "Inter-Cooler"

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Jaw, Luis. "Finned Tube Gap Resistance for Compressor Inter-Cooler." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13008.

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This paper presents a rational analysis for predicting thermal-contact resistance in the compressor intercoolers where the hot air is on the finned side with cooling water in the tube side. It further includes a derivation of the maximum design temperature for the hot air or fluid for a zero thermal-contractor or gap resistance. At the elevated temperatures, a gap resistance is created by the differential thermal expansion between the fins and the tubes. This expansion completely relaxes the initial fabrication contact pressure that binds the fins to the tubes. The equations derived for the gap resistance and maximum design temperature are quite in good agreement in verifying the results. The results generally show that the gap resistance increases as hot air temperature increase, and that the lower cooling temperatures would tolerate higher design temperatures. It is interesting to note that the initial contact pressure is a major factor in restricting the formation of the gap resistance
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Yang, Xiaoyong, Xiao Li, Jie Wang, and Youjie Zhang. "Analysis of Loss-of-Flow Accidents in Pre-Cooler and Inter-Cooler of HTR-10GT." In ASME 2018 Nuclear Forum collocated with the ASME 2018 Power Conference and the ASME 2018 12th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/nuclrf2018-7381.

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Closed Brayton cycle (CBC) coupled with High Temperature Gas-cooled Reactor (HTGR) has potential application due to its compact configuration, high power generation efficiency and inherent safety. It is also one of the major power conversion methods for Generation IV advanced nuclear power systems. The typical CBC has several helium-water heat exchangers, including pre-cooler and inter-cooler. These helium-water heat exchangers have important influence on the performance of power conversion system, especially in loss-of-flow accidents (LOFAs). A system model including the reactor and the energy conversion system was established in this paper. The 10MW High Temperature Gas-cooled reactor-test Module helium Gas Turbine (HTR-10GT) was taken as the example to show the consequences of LOFAs. The results showed that LOFAs led to the rising of water temperature out of heat exchangers. With the reduction of water flow rate, the maximum water temperature would increase sharply, and the water temperature in pre-cooler was higher than that in inter-cooler. At low water flow rate, the water temperature would exceed the boiling point. LOFAs also made the rising of helium temperature. It had impacts on the performance of helium compressors. The elevated inlet temperature of helium compressors changed the corrected speed and corrected flow rate, therefore caused the deterioration of compressor’s performance. Furthermore, the LOFAs caused the reactor inlet temperature increasing. In low water flow rate, it would make the reactor inlet temperature beyond the temperature limitation of reactor pressure vessel and influence the safety of reactor. And the LOFAs also reduced the output work of cycle. This paper provides insights of features of CBC in LOFAs and will be helpful to the design and safety operation of closed Brayton cycle coupled with HTGR.
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Liu, Yanbin, Weilin Zhuge, Yangjun Zhang, Shuyong Zhang, Junyue Zhang, and Xuemin Huo. "A Matching Method for Two-Stage Turbocharging System." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26682.

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The turbine system of a two-stage turbocharger composed of high pressure turbine, low pressure turbine and by-pass valve decides distribution and utilization of exhaust gas energy and influence performance of two-stage turbocharger in whole operational conditions. Besides, characteristics of turbine is expressed by envelop line of characteristic lines in different speeds. So turbine can be conveniently selected compared with compressor with similarity theory. Therefore two-stage turbocharger matching begins from turbine system matching in the paper. In two-stage turbocharger, cooler efficiency, cooler loss and by-pass valve open besides turbochargers will influence turbocharging system performance and design of cooler and by-pass valve are important contents of turbocharging system matching. The paper matched inter cooler, by-pass valve open, compressors and turbines jointly. Calculation model for turbocharger matching was built, and turbine performance is get from reference turbine based on similarity theory; influence of compressor ratio distribution, cooler efficiency and pressure drop in cooler imposing on compressor work was analyzed; and influence of turbine flow capacity and by-pass valve imposing on output working in expanding process was studied; the method for matching of two-stage turbocharging system in whole operational condition is studied Matching analysis was made aiming at two-stage turbocharging system of a type of high power density diesel engine, and design for turbocharging system was finished. Matching result using the method is compared to matching result using traditional method. Analysis result proves that using the method matching points in different operational conditions are located in more reasonable zone of compressor MAP.
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Saraç, Halil Ibrahim, Hasan Riza Güven, Nedim Sözbir, and Ünal Uysal. "New Algorithm for Solution of the Non-Linear Equation Systems Occurring in the Design of Thermal Systems." In ASME 1993 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/cie1993-0087.

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Abstract Models used for the design of thermal systems often lead to non-linear equations which can be converted to linear systems. In this paper, a new algorithm is described for the solution of linear equation systems which have normal or ill-conditioned form A new algorithm and the Gauss-Seidel method were used for two-stage air compression with an inter-cooler. The solutions obtained by using two different methods are compared.
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Cheng, Lap Y., Hans Ludewig, and Jae Jo. "Emergency Decay Heat Removal in a GEN-IV Gas-Cooled Fast Reactor." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89681.

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A series of transient analyses using the system code RELAP5-3d has been performed to confirm the efficacy of a proposed hybrid active/passive combination approach to the decay heat removal for an advanced 2400MWt GEN-IV gas-cooled fast reactor. The accident sequence of interest is a station blackout simultaneous with a small break (10 sq.inch/0.645m2) in the reactor vessel. The analyses cover the three phases of decay heat removal in a depressurization accident: (1) forced flow cooling by the power conversion unit (PCU) coast down, (2) active forced flow cooling by a battery powered blower, and (3) passive cooling by natural circulation. The blower is part of an emergency cooling system (ECS) that by design is to sustain passive decay heat removal via natural circulation cooling 24 hours after shutdown. The RELAP5 model includes the helium-cooled reactor, the ECS (primary and secondary side), the PCU with all the rotating machinery (turbine and compressors) and the heat transfer components (recuperator, pre-cooler and inter-cooler), and the guard containment that surrounds the reactor and the PCU. The transient analysis has demonstrated the effectiveness of passive decay heat removal by natural circulation cooling when the guard containment pressure is maintained at or above 800kPa.
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Tuo, Hanfei, Maulik Shelat, and Vijayaraghavan Chakravarthy. "Cost Benefit Analysis of Waste Heat to Power Option for Multistage Air Compressor." In ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/es2017-3396.

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This paper summarizes results of a study conducted to minimize total cost of ownership of multistage air compressors by integrating it with compact and efficient off-the-shelf organic rankine power cycle units to recover low grade waste heat from inter-stage coolers with subsequent conversion to power. The paper also highlights challenges faced by the integration and provides guidance for future cost and technology targets for key components to make it a commercial scale reality. Various schemes for vaporization of the working fluid including direct and indirect as well as full or partial were explored. Also, in order to better understand interaction between cycle efficiency and capital cost of key components, design as well as operating parameters including evaporator approach temperature, compression stage suction temperature, number of compression stages and cooling water supply temperature were investigated. Configuration, size and hence the cost of evaporator/ inter-stage cooler was found to be one of the major factors governing the overall cost. Impact of various operating modes including turn-down and seasonal variations were also studied. Air flow and final discharge pressure from the multistage air compressor were kept constant throughout the study to facilitate a fair comparison.
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Gillan, Leland, and Valeriy Maisotsenko. "Maisotsenko Open Cycle Used for Gas Turbine Power Generation." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38080.

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The Maisotsenko Open Cycle combines the thermodynamic processes of heat exchange and evaporative cooling in a unique indirect evaporative cooler resulting in product temperatures that approach the dew point temperature, (not the wet bulb temperature) of the working gas. It is an open thermodynamic cycle utilizing several thermodynamic processes that cools a product fluid with a liquid evaporating into a gas, generally water evaporating into air from the atmosphere and returns it to the atmosphere. It is a new cycle as no other cycle can be diagramed in the same way on the psychrometric chart of a gas. In a gas turbine, the gas is air and evaporate is water. An atmospheric pressure heat and mass exchanger operating with the Maisotsenko Cycle can be used to cool compressor inlet air below the wet bulb temperature. In a high-pressure heat and mass exchanger the cycle can create a compressed air saturator using heat from the turbine exhaust gases and also cools water for heat recovery in a compressor inter-cooler. The same saturator will humidify and/or superheat the compressed air before entering a combustor to the amount desired. From a practical stand point the limit of humidification of the compressed air is the amount of heat available at a temperature above its dew point temperature from the exhaust gas and/or intercompressor coolers. The amount of superheating or humidifying of the compressed air is easily controlled and changed during operation allowing added power, or greater efficiency, (60% overall thermal efficiency) quickly and easily. The equipment uses existing shell and tube heat exchanger or plate heat exchangers technologies. There are many other benefits ranging from lower NOx to greatly reduced equipment cost compared to any other power cycle enhancement systems.
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de Bruyn, Riaan, Ryan Hannink, Reiner Kuhr, Jan P. Van Ravenswaay, Nick Zervos, and Kishna Bhagat. "PBMR Desalination Options: An Economic Study." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58212.

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The Pebble Bed Modular Reactor (PBMR), under development in South Africa, is an advanced helium-cooled graphite moderated high-temperature gas-cooled nuclear reactor. The heat output of the PBMR is primarily suited for process applications or power generation. In addition, various desalination technologies can be coupled to the PBMR to further improve the overall efficiency and economics, where suitable site opportunities exist. Several desalination application concepts were evaluated for both a cogeneration configuration as well as a waste heat utilization configuration. These options were evaluated to compare the relative economics of the different concepts and to determine the feasibility of each configuration. The cogeneration desalination configuration included multiple PBMR units producing steam for a power cycle, using a back-pressure steam turbine generator exhausting into different thermal desalination technologies. These technologies include Multi-Effect Distillation (MED), Multi-Effect Distillation with Thermal Vapor Compression (MED-TVC) as well as Multi-Stage Flash (MSF) with all making use of extraction steam from backpressure turbines. These configurations are optimized to maximize gross revenue from combined power and desalinated water sales using representative economic assumptions with a sensitivity analysis to observe the impact of varying power and water costs. Increasing turbine back pressure results in a loss of power output but a gain in water production. The desalination systems are compared as incremental investments. A standard MED process with minimal effects appears most attractive, although results are very sensitive with regards to projected power and water values. The waste heat utilization desalination configuration is based on the current 165 MWe PBMR Demonstration Power Plant (DPP) to be built for the South African utility Eskom. This demonstration plant is proposed at the Koeberg Nuclear site and utilizes a direct, single shaft recuperative Brayton Cycle with helium as working fluid. The Brayton Cycle uses a pre-cooler and inter-cooler to cool the helium before entering the low-pressure compressor (LPC) and the high-pressure compressor (HPC) respectively. The pre-cooler and intercooler rejects 218 MWt of waste heat at 73°C and 63°C, respectively. This waste heat is ideally suited for some low temperature desalination processes and can be used without negative impact on the power output and efficiency of the nuclear power plant. These low temperature processes include Low Temperature Multi-Effect Distillation (LT-MED) as well Reverse Osmosis (RO) with pre-heated water. The relative economics of these design concepts are compared as add-ons to the PBMR-DPP and the results include a net present value (NPV) study for both technologies. From this study it can be concluded that both RO as well LT-MED provide water at reasonable production rates, although a final study recommendation would be based on site and area specific requirements.
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Utamura, Motoaki, Isao Takehara, Nobuyuki Horii, and Takaaki Kuwahara. "A New Gas Turbine Cycle for Economical Power Boosting." In ASME 1997 Turbo Asia Conference. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-aa-142.

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A Moisture Air Turbine (MAT) cycle is proposed for improving the characteristics of land based gas turbine by injecting atomized water at inlet to compressor. The power boosting mechanism of MAT is understood as composits of those of following existing systems: inlet air cooling system, inter-cooling and steam injection. Experiments using a 15MW class axial flow load compressor have been carried out to reveal that water evaporation in compressor could reduce compressor work in an efficient manner. Moreover, this technology has been demonstrated by means of 130MW class simple cycle gas turbine power plant to show that a small amount of water consumption is sufficient to increase power output. Very efficient evaporation could be achieved provided the size of water droplet is controlled properly. The amount of water consumption is much less than that of conventional inlet air cooling system with cooling tower for heat rejection. Incorporating water droplet evaporation profile into consideration, realistic cycle calculation model has been developed to predict power output with water injection. It has been shown that this technology is economically achievable. It should be stressed that contrary to well known evaporative cooler, MAT cycle could provide power output at a desired value within its capability regardless of ambient humidity condition.
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Hao, Haoran, Xiaoyong Yang, and Jie Wang. "Preliminary Study on Features of Key Components for HTGR Helium Turbine System." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54527.

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High temperature gas cooled reactor (HTGR) is featured by inherent safety. With high outlet temperature, HTGR is of potentially economical competitiveness. Helium turbine system can take advantage of high temperature helium to achieve high efficiency as well as compact structure, with development perspective. Key components of HTGR helium turbine system include rotary machinery such as turbo compressor and motor/generator, and heat transfer components (i.e. precooler, intercooler, recuperator and nuclear reactor). Due to the closed cycle, the features of key components are not independent. This paper preliminary explores the inherent relationships among features of key components, especially changing with reactor power. For heat transfer components, the general relationship between pressure drop and the effectiveness of heat transfer is analyzed. Furthermore, it is found that the pressure drop in recuperator, precooler and inter-cooler depends on the reactor power with engineering constraints. Besides, There exists the approximate squared relation between power and pressure drop in heat exchangers. For rotary machinery, it is found that the moment of inertia is the function of reactor power. For example, the moment of inertia of motor/generator is proportional to the reactor power. The relationship between moment of inertia of turbo-compressors and reactor power is more complex. This study is expected to be helpful to the design of key components for HTGR helium turbine system and can be applied to analyze the cycle’s dynamic characteristics.
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