Log in

Relevant bibliographies by topics / Ejector Refrigeration Cycle / Journal articles

To see the other types of publications on this topic, follow the link: Ejector Refrigeration Cycle.

Journal articles on the topic 'Ejector Refrigeration Cycle'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Ejector Refrigeration Cycle.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Yosaf, Salem, and Hasan Ozcan. "Effect of Ejector Location in Absorption Refrigeration Cycles Using Different Binary Working Fluids." International Journal of Air-Conditioning and Refrigeration 27, no. 01 (2019): 1950003. http://dx.doi.org/10.1142/s2010132519500032.

Full text

Abstract:

In this study, three novel modifications of ejector-absorption refrigeration cycles (E-ARC) are investigated to evaluate the effect of ejector location on cycle performances. In the first modification (triple pressure level absorption refrigeration cycle TPL-ARC), the ejector is located at the evaporator inlet. In the second modification (double ejector absorption refrigeration cycle DE-ARC), two ejectors are used; one is located at the evaporator inlet and the other at the absorber inlet, which are coupled to each other. In the third modification (low pressure condenser absorption refrigerati

APA, Harvard, Vancouver, ISO, and other styles

2

Abdellaoui, Ezzaalouni Yathreb, and Lakdar Kairouani Kairouani. "Thermodynamic analysis of a new dual evaporator CO2 transcritical refrigeration cycle." Archives of Thermodynamics 38, no. 1 (2017): 39–62. http://dx.doi.org/10.1515/aoter-2017-0003.

Full text

Abstract:

AbstractIn this work, a new dual-evaporator CO2transcritical refrigeration cycle with two ejectors is proposed. In this new system, we proposed to recover the lost energy of condensation coming off the gas cooler and operate the refrigeration cycle ejector free and enhance the system performance and obtain dual-temperature refrigeration simultaneously. The effects of some key parameters on the thermodynamic performance of the modified cycle are theoretically investigated based on energetic and exergetic analysis. The simulation results for the modified cycle indicate more effective system perf

APA, Harvard, Vancouver, ISO, and other styles

3

D.K.Joshi. "Ejector as an Expansion Device in Vapor Compression, Refrigeration Cycle– A study." Research and Reviews on Experimental and Applied Mechanics 3, no. 1 (2020): 1–7. https://doi.org/10.5281/zenodo.3903633.

Full text

Abstract:

<em>Two-phase ejectors have been attaining attention in recent years due to their capability to directly improve the COP of the cycle .Two-phase ejectors play a vital role as an expansion device in vapor compression refrigeration systems .Also can find prospective applications in many other industrial processes. Use of two-phase flow in the ejector is important to optimize energy saving of the system. It also explains the effects of geometrical parameters of the ejector as an expansion control mechanism on the performance of vapor compression refrigeration cycle. In the study, the effect of wo

APA, Harvard, Vancouver, ISO, and other styles

4

Raza, Waseem, Gwang Soo Ko, and Youn Cheol Park. "A Study on the Combined Driven Refrigeration Cycle Using Ejector." International Journal of Air-Conditioning and Refrigeration 29, no. 01 (2021): 2150004. http://dx.doi.org/10.1142/s2010132521500048.

Full text

Abstract:

The rising need for thermal comfort has resulted in a rapid increase in refrigeration systems’ usage and, subsequently, the need for electricity for air-conditioning systems. The ejector system can be driven by a free or affordable low-temperature heat source such as waste heat as the primary source of energy instead of electricity. Heat-driven ejector refrigeration systems become a promising solution for reducing energy consumption to conventional compressor-based refrigeration technologies. An air-conditioning system that uses the ejector achieves better performance in terms of energy-saving

APA, Harvard, Vancouver, ISO, and other styles

5

Ben Zid, Nihel, Nejib Hajji, and Mohamed El Ganaoui. "COP enhancement and comparison of different absorption cooling systems." MATEC Web of Conferences 330 (2020): 01032. http://dx.doi.org/10.1051/matecconf/202033001032.

Full text

Abstract:

The absorption refrigeration machines represent a good alternative to compression refrigeration machines but the major problem of this type of refrigeration lies in the COP, which seems to be less efficient. Several researches are carried out to improve the performances of these machines such as the combination with the technology of the ejectors. In this work, we are interested in the three ammonia-water absorption cycles: Single effect absorption, Ejector-absorption and Combined ejector-flash tank absorption cycles. A gas-gas ejector would be installed between the generator and the condenser

APA, Harvard, Vancouver, ISO, and other styles

6

Goudarzi, Koorosh, and AliReza Taghizadeh. "A Combined Power and Ejector Refrigeration Cycle System for Thermal Energy Recovery from the Waste Heat of Internal Combustion Engine." Journal of Energy and Power Technology 05, no. 01 (2023): 1–23. http://dx.doi.org/10.21926/jept.2301006.

Full text

Abstract:

In this paper, due to the importance of energy recovery from internal combustion engines and the increasing human growing need for power and refrigeration, a two-cycle power and refrigeration system consisting of an organic Rankine cycle and an ejector refrigeration cycle is investigated analytically. The proposed system with the ability to use the ejector<span dir="RTL"> as an effective and economical system, can produce simultaneous power and refrigeration by drawing thermal energy from the exhaust gas and engine coolant in the form of a novel cycle. This study analyzes the proposed no

APA, Harvard, Vancouver, ISO, and other styles

7

Mukhtar, Hamza K., and Saud Ghani. "Hybrid Ejector-Absorption Refrigeration Systems: A Review." Energies 14, no. 20 (2021): 6576. http://dx.doi.org/10.3390/en14206576.

Full text

Abstract:

Absorption Refrigeration Systems (ARS) are potential alternatives to direct expansion (DX) refrigeration systems. This review focused on the incorporation of an ejector into absorption refrigeration cycles to constitute Hybrid Ejector-Absorption Refrigeration Systems (HEARS). The ejector adds several advantages to the absorption refrigeration systems depending on its location in the cycle. The two prevalent configurations of HEARS are Triple pressure level (TPL-HEARS), and Low Pressure Condenser (LPC-HEARS). Previous studies revealed the preference of the latter configuration as it allows lowe

APA, Harvard, Vancouver, ISO, and other styles

8

Mukhtar, Hamza K., and Saud Ghani. "Hybrid Ejector-Absorption Refrigeration Systems: A Review." Energies 14, no. 20 (2021): 6576. http://dx.doi.org/10.3390/en14206576.

Full text

Abstract:

Absorption Refrigeration Systems (ARS) are potential alternatives to direct expansion (DX) refrigeration systems. This review focused on the incorporation of an ejector into absorption refrigeration cycles to constitute Hybrid Ejector-Absorption Refrigeration Systems (HEARS). The ejector adds several advantages to the absorption refrigeration systems depending on its location in the cycle. The two prevalent configurations of HEARS are Triple pressure level (TPL-HEARS), and Low Pressure Condenser (LPC-HEARS). Previous studies revealed the preference of the latter configuration as it allows lowe

APA, Harvard, Vancouver, ISO, and other styles

9

LITTLE, ADRIENNE B., and SRINIVAS GARIMELLA. "A REVIEW OF EJECTOR TECHNOLOGY FOR REFRIGERATION APPLICATIONS." International Journal of Air-Conditioning and Refrigeration 19, no. 01 (2011): 1–15. http://dx.doi.org/10.1142/s2010132511000351.

Full text

Abstract:

This paper provides a comprehensive review of ejector technology for refrigeration applications, combining an understanding of basic fluid flow fundamentals within the ejector with application in cycle-level development. An ejector is a passive device that requires no external mechanical input or moving parts. A high-velocity motive stream produces a low-pressure region into which a suction flow is entrained, resulting in a pressure rise of the suction flow and mixing between the two streams to provide a pumping effect. The first part of this review addresses the progression from experiment-ba

APA, Harvard, Vancouver, ISO, and other styles

10

Sumeru, Kasni, Luga Martin, Farid Nasir Ani, Henry Nasution, and Farid Nasir Ani. "Energy Savings in Air Conditioning System Using Ejector: An Overview." Applied Mechanics and Materials 493 (January 2014): 93–98. http://dx.doi.org/10.4028/www.scientific.net/amm.493.93.

Full text

Abstract:

There are two ejector configurations described in the present study: ejector refrigeration cycle and the ejector as an expansion device. The use of waste heat from the car engine and industry as a heat-driven energy for air conditioning system in automobile and building can save energy. Although the ejector refrigeration cycle has a low COP, the use of waste heat as a heat-driven energy incurs a lower operational cost compared with vapor compression refrigeration system. In addition, an ejector as an expansion device can be applied in the vapor compression refrigeration cycle to improve the pe

APA, Harvard, Vancouver, ISO, and other styles

11

Ялама, В. В., and М. Г. Хмельнюк. "EN Energy efficiency improvement for the older reefer vessel by the combined compression-ejector refrigeration machine." Refrigeration Engineering and Technology 59, no. 3 (2023): 146–58. http://dx.doi.org/10.15673/ret.v59i3.2664.

Full text

Abstract:

A marine combined compression-ejector refrigeration machine that comprises conventional refrigeration and air-conditioning system using single-stage refrigeration machine and an ejector refrigeration machine is proposed and studied. The ejector refrigeration machine is driven by the waste heat from the single-stage refrigeration machine and acts as the bottom cycle of the single-stage refrigeration machine. A system analysis shows that the COP of a compression-ejector refrigeration machine is significantly higher than a one-stage refrigeration system. Improvement in COP can be as high as 19.3%

APA, Harvard, Vancouver, ISO, and other styles

12

Ouelhazi, I., Y. Ezzaalouni, and L. Kairouani. "Parametric analysis of a combined ejector-vapor compression refrigeration cycle." International Journal of Low-Carbon Technologies 15, no. 3 (2020): 398–408. http://dx.doi.org/10.1093/ijlct/ctaa011.

Full text

Abstract:

Abstract From the last few years, the use of efficient ejector in refrigeration systems has been paid a lot of attention. In this article a description of a refrigeration system that combines a basic vapor compression refrigeration cycle with an ejector cooling cycle is presented. A one-dimensional mathematical model is developed using the flow governing thermodynamic equations based on a constant area ejector flow model. The model includes effects of friction at the constant-area mixing chamber. The current model is based on the NIST-REFPROP database for refrigerant property calculations. The

APA, Harvard, Vancouver, ISO, and other styles

13

Mchounchi, Lahcen, Youcef Tamene, Hakim Madanı, and Mohammed Mehemmai. "Performances Study of Eco-friendly Binary Azeotropic Mixtures Used as Working Fluid in Three Refrigeration Cycles." International Journal of Thermodynamics, Erken Görünüm - Early Pub Issues (November 6, 2024): 1–13. http://dx.doi.org/10.5541/ijot.1514168.

Full text

Abstract:

According to the European (F-gas) regulation, all refrigerants with a global warming potential (GWP) above 150 will be out by 2030. Searching for alternative refrigerants that are environmentally friendly has become an urgent challenge for the refrigeration and air-conditioning sector. Based on their environmental advantages and good thermo-physical properties, azeotropic mixtures have recently gained special interest as substitutes for conventional refrigerants. This study aims to compare the performance of three eco-friendly azeotropic mixtures with the common refrigerant R134a in three refr

APA, Harvard, Vancouver, ISO, and other styles

14

KUMAR, RAJ, and ANIL KUMAR. "ENERGY AND EXERGY ANALYSIS OF COMPACT POWER GENERATION AND HYBRID SOLAR ENERGY-WASTE HEAT-BASED TRIPLE EFFECT EJECTOR-VAPOR ABSORPTION REFRIGERATION CYCLE." International Journal of Air-Conditioning and Refrigeration 21, no. 04 (2013): 1350023. http://dx.doi.org/10.1142/s2010132513500235.

Full text

Abstract:

An NH 3– H 2 O ejector-absorption refrigeration cycle, and an R-152a ejector refrigeration cycle are employed with a renewable energy power generator to make a proposed compact power generation and triple effect ejector-absorption refrigeration cycle. The exergy analysis of the cycle leads to a possible performance improvement. Approximately 71.69% of the input exergy is destructed due to irreversibilities in different components. Around 7.976% is available as the useful exergy output. The exhaust exergy lost to the environment is 20.33%, which is lower than the exhaust energy loss of 47.95%,

APA, Harvard, Vancouver, ISO, and other styles

15

Gjerasimovski, Aleksandar, Maja Sharevska, Natasha Gjerasimovska, Monika Sharevska, and Risto Filkoski. "Thermal characteristics of combined compressor - ejector refrigeration/heat pump systems for HVAC&R." Thermal Science, no. 00 (2023): 182. http://dx.doi.org/10.2298/tsci230513182g.

Full text

Abstract:

Thermal characteristics of combined compressor - ejector refrigeration/heat pump systems applied in heating, ventilation, air conditioning and refrigeration (HVAC&R) of buildings are investigated. An original model for estimation of the thermal characteristics of the combined cycles is developed, to determine the influence of the evaporation, interstage, condensation, and generating temperature conditions on mechanical and thermal COPs of the combined system, and to optimize the thermal parameters of the cycle. Results are presented for different temperature conditions, with R134a as a sui

APA, Harvard, Vancouver, ISO, and other styles

16

Dudar, Adam, Dariusz Butrymowicz, Kamil Śmierciew, and Jarosław Karwacki. "Exergy analysis of operation of two-phase ejector in compression refrigeration systems." Archives of Thermodynamics 34, no. 4 (2013): 107–22. http://dx.doi.org/10.2478/aoter-2013-0032.

Full text

Abstract:

Abstract Paper deals with theoretical analysis of possible efficiency increase of compression refrigeration cycles by means of application of a twophase ejector. Application of the two phase ejector in subcritical refrigeration system as a booster compressor is discussed in the paper. Results of exergy analysis of the system operating with various working fluids for various operating conditions have been shown. Analysis showed possible exergy efficiency increase of refrigeration compression cycle.

APA, Harvard, Vancouver, ISO, and other styles

17

Tashtoush, Bourhan, Tatiana Morosuk, and Jigar Chudasama. "Exergy and Exergoeconomic Analysis of a Cogeneration Hybrid Solar Organic Rankine Cycle with Ejector." Entropy 22, no. 6 (2020): 702. http://dx.doi.org/10.3390/e22060702.

Full text

Abstract:

Solar energy is utilized in a combined ejector refrigeration system with an organic Rankine cycle (ORC) to produce a cooling effect and generate electrical power. This study aims at increasing the utilized share of the collected solar thermal energy by inserting an ORC into the system. As the ejector refrigeration cycle reaches its maximum coefficient of performance (COP), the ORC starts working and generating electrical power. This electricity is used to run the circulating pumps and the control system, which makes the system autonomous. For the ejector refrigeration system, R134a refrigerant

APA, Harvard, Vancouver, ISO, and other styles

18

Yang, Dazhang, Yang Li, Jing Xie, and Jinfeng Wang. "Energetic and entropy analysis of a novel transcritical CO2 two-stage compression/ejector refrigeration cycle for shipboard cold chamber." Thermal Science, no. 00 (2022): 181. http://dx.doi.org/10.2298/tsci220702181y.

Full text

Abstract:

The adverse effects of global warming and climate change require critical measures for marine refrigeration technology because of its impact on greenhouse gas emissions. A novel transcritical CO2 two-stage compression/ejector refrigeration cycle for shipboard cold chamber is proposed in this research. A comparative analysis was conducted between the basic transcritical CO2 two-stage compression cycle and the cycle equipped with a two-phase ejector considering the coefficient of performance. Meanwhile, the refrigeration cycle was analyzed using entropy analysis to elucidate the distribution of

APA, Harvard, Vancouver, ISO, and other styles

19

Arifianto, Enang Suma, Ega Taqwali Berman, and Mutaufiq Mutaufiq. "Investigation on the improvement of car air conditioning system performance using an ejector." MATEC Web of Conferences 197 (2018): 08013. http://dx.doi.org/10.1051/matecconf/201819708013.

Full text

Abstract:

The purpose of this research is to know the improvement of car air conditioner system performance using an ejector. The study was conducted on a car engine with power 100 PS (74 kW) @ 5000 rpm. The test procedure is carried out under two conditions: the normal refrigeration cycle mode and the refrigeration cycle mode with the ejector. The working fluid used in the refrigeration cycle is R-134a. Performance data was measured on engine revolutions ranging from 1500 - 3000 rpm. Finally, the results showed that ejector usage on AC system generates an increase in the refrigeration effect and coeffi

APA, Harvard, Vancouver, ISO, and other styles

20

Aidoun, Zine, Khaled Ameur, Mehdi Falsafioon, and Messaoud Badache. "Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 2: Two-Phase Ejectors." Inventions 4, no. 1 (2019): 16. http://dx.doi.org/10.3390/inventions4010016.

Full text

Abstract:

Two-phase ejectors play a major role as refrigerant expansion devices in vapor compression systems and can find potential applications in many other industrial processes. As a result, they have become a focus of attention for the last few decades from the scientific community, not only for the expansion work recovery in a wide range of refrigeration and heat pump cycles but also in industrial processes as entrainment and mixing enhancement agents. This review provides relevant findings and trends, characterizing the design, operation and performance of the two-phase ejector as a component. Eff

APA, Harvard, Vancouver, ISO, and other styles

21

Khalil, A., M. Fatouh, and E. Elgendy. "Ejector design and theoretical study of R134a ejector refrigeration cycle." International Journal of Refrigeration 34, no. 7 (2011): 1684–98. http://dx.doi.org/10.1016/j.ijrefrig.2011.01.005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

SEÇKİN, Candeniz. "Energy and Exergy Analysis of an Innovative Power/Refrigeration Cycle: Kalina Cycle and Ejector Refrigeration Cycle." International Journal of Advances in Engineering and Pure Sciences 35, no. 2 (2023): 193–202. http://dx.doi.org/10.7240/jeps.1203686.

Full text

Abstract:

This study presents a thermodynamic analysis of a new combined power/refrigeration combined cycle. The combined cycle is comprised of two innovative cycles: Kalina cycle (KNC) and ejector refrigeration cycle (ERC) for power and refrigeration production, respectively. Recovery of heat process is involved in the design of the cycle to rise the energetic and exergetic efficiencies: emitted heat by the KNC is absorbed by the ERC in order to generate cooling. Effects of variation in KNC operational conditions which have direct effects on turbine power production capacity (temperature and pressure o

APA, Harvard, Vancouver, ISO, and other styles

23

Коновалов, Дмитро Вікторович, Роман Миколайович Радченко, Сергій Георгійович Фордуй, Фелікс Володимирович Царан, Віктор Павлович Халдобін та Артем Вікторович Грич. "Моделювання та програмний комплекс для дослідження функціонування ежектора в змінних режимах". RADIOELECTRONIC AND COMPUTER SYSTEMS, № 3 (5 жовтня 2021): 37–47. http://dx.doi.org/10.32620/reks.2021.3.04.

Full text

Abstract:

One of the current directions of development of modern energy-saving and energy-efficient technologies for ship and stationery (including municipal) energy is the use of ejector refrigeration machines, which can be used for air conditioning systems together with an absorption refrigeration machine (cascade cycle) or vapor compressor refrigeration machine as part of cogeneration or trigeneration units. Such circuit solutions can be used together with ensuring the rational organization of work processes in the main elements of the refrigeration machine, in particular in the jet device - ejector,

APA, Harvard, Vancouver, ISO, and other styles

24

Hong, Daliang, Guangming Chen, Limin Tang, and Yijian He. "A novel ejector-absorption combined refrigeration cycle." International Journal of Refrigeration 34, no. 7 (2011): 1596–603. http://dx.doi.org/10.1016/j.ijrefrig.2010.07.007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Grazzini, G., A. Milazzo, and D. Paganini. "Design of an ejector cycle refrigeration system." Energy Conversion and Management 54, no. 1 (2012): 38–46. http://dx.doi.org/10.1016/j.enconman.2011.09.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Muhammad, Hafiz Ali, Hafiz Muhammad Abdullah, Zabdur Rehman, et al. "Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System." Energies 13, no. 21 (2020): 5835. http://dx.doi.org/10.3390/en13215835.

Full text

Abstract:

An ejector is a simple mechanical device that can be integrated with power generation or the refrigeration cycle to enhance their performance. Owing to the complex flow behavior in the ejector, the performance prediction of the ejector is done by numerical simulations. However, to evaluate the performance of an ejector integrated power cycle or refrigeration cycle, the need for simpler and more reliable thermodynamic models to estimate the performance of the ejector persists. This research, therefore, aims at developing a single mathematical correlation that can predict the ejector performance

APA, Harvard, Vancouver, ISO, and other styles

27

Sarkar, J. "Performance characteristics of natural-refrigerants- based ejector expansion refrigeration cycles." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 223, no. 5 (2009): 543–50. http://dx.doi.org/10.1243/09576509jpe753.

Full text

Abstract:

The thermodynamic analyses and comparison of three natural-refrigerants-based vapour compression refrigeration cycles (ammonia, isobutane, and propane) are presented in this article using a constant pressure mixing ejector as an expansion device. Optimization of the area ratio of the ejector is done based on maximum cooling coefficient of performance (COP) and performance improvement for different operating conditions. The effect of using an internal heat exchanger is studied as well. Results show that optimum area ratio and cooling COP increases with a decrease in cycle temperature lift, wher

APA, Harvard, Vancouver, ISO, and other styles

28

Agrawal, Basant K., and Munawar N. Karimi. "Study of simple ejector refrigeration cycle with combined cycle." Invertis Journal of Renewable Energy 6, no. 4 (2016): 213. http://dx.doi.org/10.5958/2454-7611.2016.00031.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Saleh, B., Ayman A. Aly, M. Alsehli, M. M. Bassuoni, and A. Elfasakhany. "Performance investigation of a solar-driven ejector refrigeration cycle." World Journal of Engineering 16, no. 5 (2019): 625–35. http://dx.doi.org/10.1108/wje-03-2019-0088.

Full text

Abstract:

Purpose This paper aims to investigate the performance and working fluids screening for an ejector refrigeration cycle (ERC) activated by solar energy. Several common and new hydrofluorocarbons, hydrocarbons, hydrofluoroolefins and hydrofluoroethers are proposed as refrigerants for the ERC to determine the most appropriate one. Design/methodology/approach The ejector performance is characterized by the ejector area ratio (EAR) and entrainment ratio (ω), while the cycle performance is described by the coefficient of performance (COP). The influences of many working parameters like the evaporato

APA, Harvard, Vancouver, ISO, and other styles

30

Riaz, Fahid, Kah Hoe Tan, Muhammad Farooq, Muhammad Imran, and Poh Seng Lee. "Energy Analysis of a Novel Ejector-Compressor Cooling Cycle Driven by Electricity and Heat (Waste Heat or Solar Energy)." Sustainability 12, no. 19 (2020): 8178. http://dx.doi.org/10.3390/su12198178.

Full text

Abstract:

Low-grade heat is abundantly available as solar thermal energy and as industrial waste heat. Non concentrating solar collectors can provide heat with temperatures 75–100 °C. In this paper, a new system is proposed and analyzed which enhances the electrical coefficient of performance (COP) of vapour compression cycle (VCC) by incorporating low-temperature heat-driven ejectors. This novel system, ejector enhanced vapour compression refrigeration cycle (EEVCRC), significantly increases the electrical COP of the system while utilizing abundantly available low-temperature solar or waste heat (below

APA, Harvard, Vancouver, ISO, and other styles

31

Yadav, Ajay Kumar, and Neeraj. "Performance Analysis of Refrigerants R1234yf, R1234ze and R134a in Ejector-Based Refrigeration Cycle." International Journal of Air-Conditioning and Refrigeration 26, no. 03 (2018): 1850026. http://dx.doi.org/10.1142/s2010132518500268.

Full text

Abstract:

Performance enhancement of refrigeration and heat pump systems by cycle modification is an emerging research topic now-a-days to reduce the electricity consumption leading to mitigate the problems related to the environmental pollution by utility power plants. Due to no moving parts, low cost, simple structure and low maintenance requirements, the use of two-phase ejector has become a promising cycle modification recently. Use of ejector as an expansion device by replacing the throttle valve in the vapor compression refrigeration cycle seems to be one of the efficient ways to reduce the thrott

APA, Harvard, Vancouver, ISO, and other styles

32

Lei, Yu, Shengyu Li, Jun Lu, Ye Xu, Yong Yong, and Dingding Xing. "Numerical Analysis of Steam Ejector Performance with Non-Equilibrium Condensation for Refrigeration Applications." Buildings 13, no. 7 (2023): 1672. http://dx.doi.org/10.3390/buildings13071672.

Full text

Abstract:

In recent years, there has been great interest in developing cooling systems with humidity- and temperature-independent control capabilities that can operate efficiently at varying temperatures. This paper proposes a bi-loop double-evaporator ejection–compression cycle, which utilizes low-grade heat and is suitable for the construction industry. The proposed cycle involves the concurrent operation of a vapor compression cycle and an ejector refrigeration cycle that enables it to handle altered pressure levels and operate with varying compression ratios all the way to a common condenser pressur

APA, Harvard, Vancouver, ISO, and other styles

33

Cheng, Zhi Wen. "Performance Analysis of a Novel Compression Refrigeration System." Applied Mechanics and Materials 721 (December 2014): 170–73. http://dx.doi.org/10.4028/www.scientific.net/amm.721.170.

Full text

Abstract:

In this paper, the theoretical analysis and calculation were put forward for the novel compression refrigeration cycle, new cycle compared with conventional compression refrigeration cycle adding a jet pump and evaporator to reduce throttling losses and improve the compressor inlet pressure. The results show that COP decreases with the increase of condensing temperature, with the increase of evaporation temperature increased, and decreased with the increase of the ejector coefficient. Novel compression refrigeration cycle coefficient of performance than the conventional compression refrigerati

APA, Harvard, Vancouver, ISO, and other styles

34

Atmaca, Ayşe Uğurcan, Aytunç Erek, and Orhan Ekren. "Preliminary Design of the Two-Phase Ejector under Constant Area Mixing Assumption for 5 kW Experimental System." E3S Web of Conferences 103 (2019): 01002. http://dx.doi.org/10.1051/e3sconf/201910301002.

Full text

Abstract:

Ejector expansion refrigeration cycle is the modification of the vapour compression refrigeration cycle with the implementation of a two-phase ejector and a vapour-liquid separator to improve the cycle performance. In this study, main geometrical parameters of an ejector, i.e. diameters of the motive nozzle throat, motive nozzle outlet, suction nozzle outlet, and constant area mixing section are calculated in order to provide the preliminary design aspects at various operation conditions. The thermodynamic model of the ejector is established with reference to constant-area mixing assumption. T

APA, Harvard, Vancouver, ISO, and other styles

35

Maziar, Reza, Kasni Sumeru, M. Y. Senawi, and Farid Nasir Ani. "Performance of Ejector Refrigeration Cycle for Automotive Air Conditioning." Applied Mechanics and Materials 819 (January 2016): 202–6. http://dx.doi.org/10.4028/www.scientific.net/amm.819.202.

Full text

Abstract:

In this study, two experiments were performed, one with the conventional compression refrigeration cycle (CRC) and the other with an ejector refrigeration cycle (ERC). The CRC system for automotive air conditioning was designed, fabricated and experiments were conducted. The system was then retrofitted with an ejector as the expansion device and experiments were repeated for the ERC system. Calculations of the entrainment ratio, compressor compression ratio and coefficient of performance (COP) were made for each cycle. The calculations showed that ERC has some advantages over the CRC. In this

APA, Harvard, Vancouver, ISO, and other styles

36

Seckin, Candeniz. "Thermodynamic analysis of a combined power/refrigeration cycle: Combination of Kalina cycle and ejector refrigeration cycle." Energy Conversion and Management 157 (February 2018): 631–43. http://dx.doi.org/10.1016/j.enconman.2017.12.047.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Tashtoush, Bourhan, Karima Megdouli, Mouna Elakhdar, Ezzedine Nehdi, and Lakdar Kairouani. "A Comprehensive Energy and Exergoeconomic Analysis of a Novel Transcritical Refrigeration Cycle." Processes 8, no. 7 (2020): 758. http://dx.doi.org/10.3390/pr8070758.

Full text

Abstract:

A comprehensive energy and exergoeconomic analysis of a novel transcritical refrigeration cycle (NTRC) is presented. A second ejector is introduced into the conventional refrigeration system for the utilization of the gas-cooler waste heat. The thermodynamic properties of the working fluid are estimated by the database of REFPROP 9, and a FORTRAN program is used to solve the system governing equations. Exergy, energy, and exergoeconomic analyses of the two cycles are carried out to predict the exergetic destruction rate and efficiency of the systems. The optimum gas cooler working pressure wil

APA, Harvard, Vancouver, ISO, and other styles

38

Boumaraf, Latra, and Rachedi Khadraoui. "Investigation on the Performance of a Solar Hybrid Refrigeration System Using Environmentally Friendly Fluids." International Journal of Heat and Technology 38, no. 4 (2020): 960–66. http://dx.doi.org/10.18280/ijht.380423.

Full text

Abstract:

In order to evaluate the performance of a hybrid compression / ejection refrigeration system using solar energy at low or medium temperature, a simulation model of its behavior based on those of its various components has been developed. It includes in particular for the ejector, a 1-D model of the "constant section mixing" type developed in optimal transition regime. The refrigerants tested are steam for the ejector loop and the R1234yf (replacing the R134a) for the mechanical compression loop. The behavior of the H2O vapor flowing in the ejector is considered that of the perfect gas. The pro

APA, Harvard, Vancouver, ISO, and other styles

39

Wani, J. R., Aklilu T. Baheta, Abraham D. Woldeyohannes, and Suhaimi Hassan. "Analysis of Refrigeration Cycle Performance with an Ejector." MATEC Web of Conferences 74 (2016): 00021. http://dx.doi.org/10.1051/matecconf/20167400021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

NAKAGAWA, Masafumi, Hirotsugu TAKEUCHI, and Masaharu NAKAJIMA. "Performance of Two Phase Ejector in Refrigeration Cycle." Transactions of the Japan Society of Mechanical Engineers Series B 64, no. 625 (1998): 3060–67. http://dx.doi.org/10.1299/kikaib.64.3060.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Li, Huashan, Fei Cao, Xianbiao Bu, Lingbao Wang, and Xianlong Wang. "Performance characteristics of R1234yf ejector-expansion refrigeration cycle." Applied Energy 121 (May 2014): 96–103. http://dx.doi.org/10.1016/j.apenergy.2014.01.079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Li, Daqing, and Eckhard A. Groll. "Transcritical CO2 refrigeration cycle with ejector-expansion device." International Journal of Refrigeration 28, no. 5 (2005): 766–73. http://dx.doi.org/10.1016/j.ijrefrig.2004.10.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Yin, Li Yuan, Qi Tian, and Fei Fei Zhang. "Optimization of Operating Parameters of a Solar Ejector Refrigeration System on Exergy Analysis." Applied Mechanics and Materials 178-181 (May 2012): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.37.

Full text

Abstract:

Exergy analysis is used as a tool to analyze the performance of a refrigeration system. In this paper, it is based on the following conditions: the solar radiation is set as 750 W/m2, the refrigerating capacity is 10 kW, R141b is fixed as the refrigerant in the refrigeration cycle and ambient temperature to be the reference temperature is 31°C. The exergy analysis results of the solar ejector refrigeration system shows that irreversible loss comes from all components and depends on the operating temperatures. The exergy efficiency increases with the condensation temperature’s decrease or the e

APA, Harvard, Vancouver, ISO, and other styles

44

Xie, Pengyu, and Weixue Jiang. "Optimization Strategies for Integrating an Ejector into a Two-Stage Vapor Compression Refrigeration System." Journal of Industry and Engineering Management 2, no. 3 (2024): 49–55. https://doi.org/10.62517/jiem.202403309.

Full text

Abstract:

To further investigate how to optimize the coefficient of performance (COP) of a two-stage compression refrigeration system, this paper focuses on process optimization and theoretical calculations for an incomplete intercooling two-stage compression refrigeration cycle using refrigerant R410A. The model established for the ejector system was validated, showing an average calculation error of approximately 6%, indicating good agreement with the simulations. The study compared changes in the COP and ejector coefficient under variations in factors such as subcooling in the intercooler, superheati

APA, Harvard, Vancouver, ISO, and other styles

45

Sarbu, Ioan, Emilian Valea, and Calin Sebarchievici. "Solar Refrigerating Systems." Advanced Materials Research 772 (September 2013): 581–86. http://dx.doi.org/10.4028/www.scientific.net/amr.772.581.

Full text

Abstract:

Along with the global warming impacts and climate changes, the demands for air conditioning and refrigeration have increased. Therefore, providing cooling by utilizing renewable energy such as solar energy is a key solution to the energy and environmental issues. In this paper are presented theoretical basis and practical applications for cooling technologies assisted by solar energy and their recent advances. The ejector cycle represents the thermo-mechanical cooling system, and has a higher coefficient of performance (COP) but require a higher heat source temperature than other cycles. Based

APA, Harvard, Vancouver, ISO, and other styles

46

Trokoz, Ya Ye, P. O. Barabash, P. P. Kudelya, and O. B. Golubev. "Development and research of refrigeration cycle with biagent jet compressor." KPI Science News, no. 4 (February 14, 2022): 77–82. http://dx.doi.org/10.20535/kpisn.2021.4.252054.

Full text

Abstract:

Background. Currently, in the cycles of steam-ejector refrigeration machines (SERM) are used monoagent jet compressors, the working body in which is water. Despite their low efficiency, SERM have a number of advantages over refrigeration machines that usemechanical compressors: low cost, ease of manufacture and reliability. The use of SERM is largely limited by the inability of these installations to reach temperatures below 0 °C. This limitation can be overcome by applying a fundamentally new steam compressioncycle using a bioagent (water-freon) jet compressor (BAJC).Objective. The purpose of

APA, Harvard, Vancouver, ISO, and other styles

47

Jiang, Yuemao, Zhe Wang, Yue Ma, Yulong Ji, Wenjian Cai, and Fenghui Han. "Supercritical CO2 Power Cycle and Ejector Refrigeration Cycle for Marine Dual Fuel Engine Efficiency Enhancement by Utilizing Exhaust Gas and Charge Air Heat." Journal of Marine Science and Engineering 10, no. 10 (2022): 1404. http://dx.doi.org/10.3390/jmse10101404.

Full text

Abstract:

Dual fuel engines with LNG as fuel have become a feasible solution for ship power units in the current situation, but their fuel efficiency needs to be further enhanced to meet the increasingly stringent emission requirements. This paper designs a dual-loop system, including a supercritical CO2 power cycle and a thermally driven ejector refrigeration cycle, for recovering the exhaust gas and charge air heat of a marine dual fuel engine. The models of the waste heat recovery system, the evaluation indicators of the combined system, and the genetic algorithm optimization program are developed. C

APA, Harvard, Vancouver, ISO, and other styles

48

Shovon, Md Khairul Bashar, Raman Senthil Kumar, Tae Ho Kim, and Heuy Dong Kim. "Study on Conceptual Design of a Solar Ejector Refrigeration System." International Journal of Air-Conditioning and Refrigeration 28, no. 01 (2020): 2030001. http://dx.doi.org/10.1142/s2010132520300013.

Full text

Abstract:

The refrigeration system based on the conventional compression cycle consumes an enormous amount of high-grade energy. Using fossil fuels as the energy sources results in the addition of CO2 into the atmosphere and consequently stimulating higher greenhouse effect. The ejector refrigeration systems powered by renewable energy sources would be an effective alternative without increasing global CO2 footprint. In this study, the performance characteristics of a solar ejector refrigeration system working with R718 are analytically calculated by using a one-dimensional flow model. At the critical m

APA, Harvard, Vancouver, ISO, and other styles

49

Yari, M., and M. Sirousazar. "Cycle improvements to ejector-expansion transcritical CO2 two-stage refrigeration cycle." International Journal of Energy Research 32, no. 7 (2008): 677–87. http://dx.doi.org/10.1002/er.1385.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Fu, Jiawei, Zhenhua Liu, Xingyang Yang, Sumin Jin, and Jilei Ye. "Limiting Performance of the Ejector Refrigeration Cycle with Pure Working Fluids." Entropy 25, no. 2 (2023): 223. http://dx.doi.org/10.3390/e25020223.

Full text

Abstract:

An ejector refrigeration system is a promising heat-driven refrigeration technology for energy consumption. The ideal cycle of an ejector refrigeration cycle (ERC) is a compound cycle with an inverse Carnot cycle driven by a Carnot cycle. The coefficient of performance (COP) of this ideal cycle represents the theoretical upper bound of ERC, and it does not contain any information about the properties of working fluids, which is a key cause of the large energy efficiency gap between the actual cycle and the ideal cycle. In this paper, the limiting COP and thermodynamics perfection of subcritica

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!