Experimental and theoretical investigation on the performance of CO2/propane auto-cascade refrigerator with a fractionation heat exchanger

Zhang, Li; Xu, Shiming; Du, Ping; Liu, Huanying

doi:10.1016/j.applthermaleng.2015.05.016

Cited by 54 publications

(9 citation statements)

References 24 publications

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“…The relationship between condenser temperature and exergy efficiency is not linier, will reach a minimum value under certain conditions. The results of this research are relevant to the results of study can be seen in review papers by several authors [19,20,22], that is, if the condenser temperature rises, the exergy efficiency will decrease. In Figure 8, shows the effect of evaporator temperature on mass ratio HTC and LTC, where / has a linier trend that is inversely related to increase of evaporator temperature, the mass ratio / decrease.…”

Section: Effect Evaporator Temperature On Cop Cascadementioning

confidence: 59%

“…Figure 5, it shows if the evaporator temperature goes up increase from 200 K to 270 K, the total exergy loss or total energy loss decreases. While the lowest amount of energy loss is MC22-R404A, the highest total exergy loss is MC134-R404A which is 11.75 kW, when evaporator temperature 220 K. The results of this phenomenon are relevant to results research [19,[21][22]. Figure 6, it shows that effect evaporator temperature on exergy efficiency, where the relationship is not linier.…”

Section: Effect Evaporator Temperature On Cop Cascadementioning

confidence: 80%

“…Based on the p-H diagram in Figure 2, CRS thermodynamic analysis is based on assumptions development by Lui [19], Sarkar [20], and Anand [21] that is :…”

Section: Methodsmentioning

confidence: 99%

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Energy and Exergy Analysis of Cascade Refrigeration System Using MC22 and MC134 on HTC, R404A and R502 on LTC

Hendri

Nurhasanah

Prayudi

et al. 2021

ARFMTS

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Low temperature storage with a single refrigeration system only stable up to 228 K temperature. The purpose of this study is to develop a low temperature cool storage with cascade refrigeration system, with hydrocarbon refrigerants in terms of energy and exergy analysis. Experimental research in laboratories using refrigerant hydrocarbon MC22 and MC134 on the hight temperature circuit, and R404A and R502 using on low temperature circuit. Condenser heat exchanger using a type of exchanger plate. Resulting from this research, obtained that result the MC22/R404A, MC22/R502 and MC134/R404A refrigerant pair can reach a temperature of 220 K. The MC22/R404A refrigerant pair has god performance, COP, total loss exergy, and exergy efficiency is better than MC22/R502, and MC134/R04A refrigerant pairs.

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Section: Effect Evaporator Temperature On Cop Cascadementioning

confidence: 59%

Section: Effect Evaporator Temperature On Cop Cascadementioning

confidence: 80%

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Energy and Exergy Analysis of Cascade Refrigeration System Using MC22 and MC134 on HTC, R404A and R502 on LTC

Hendri

Nurhasanah

Prayudi

et al. 2021

ARFMTS

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“…Thus the assumption of the temperature approaches across the IHXs should be confirmed by a detailed temperature distribution analysis as stated by Rozhenstev [23]. Otherwise very small or even negative temperature differences at the pinch points may occur if the assumed temperature approach is relatively low in the range of 3 K to 5 K resulting in system parameters that vary from the simulated values [21].…”

mentioning

confidence: 83%

“…The calculated COP value was higher in low-temperature ambient conditions. A modified propane/CO 2 ACR system with a fractionation heat exchanger (FHEX) in the form of a rectifying column in the upper section of the phase separator was investigated by Zhang et al [21]. The FHEX improved separation efficiency, resulting in lower evaporation temperatures.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Effect of a Recuperative Heat Exchanger and Throttles Opening on a CO2/Isobutane Autocascade Refrigeration System

Sobieraj

2020

Energies

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An experimental evaluation of an autocascade refrigeration (ACR) system was carried out. A zeotropic mixture of isobutane and CO2 was employed as a working fluid in an autocascade refrigeration (ACR) system. An experimental system was designed and built to study the influence of the recuperative heat exchanger (RHX) and openings of the throttle valves on the system performance. The use of RHX facilitated the condensation process and improved the cycle characteristics. The working mass concentration of CO2 was higher, as it was closer to the nominal concentration and the discharge pressure was lower by 19% to even 39% when the RHX was employed in the system. An increase of up to 20% in the coefficient of performance (COP) was observed. Furthermore, the effects of the openings of the throttle valves on the system characteristics were studied. The change in the openings of the expansion valves affected the mass flows and the working mixture composition. The working CO2 mass fraction increased with higher openings of the evaporator throttle. The subcooling degree of liquid CO2-rich refrigerant increased with higher openings of the expansion valve under the phase separator. The results of the present work should be helpful for design and optimization of autocascade systems working with natural and synthetic refrigerants.

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Investigation of the Efficiency of Autocascade and Cascade Heat Pumps in Cold Climate

et al. 2020

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Experimental and theoretical investigation on the performance of CO2/propane auto-cascade refrigerator with a fractionation heat exchanger

Cited by 54 publications

References 24 publications

Energy and Exergy Analysis of Cascade Refrigeration System Using MC22 and MC134 on HTC, R404A and R502 on LTC

Energy and Exergy Analysis of Cascade Refrigeration System Using MC22 and MC134 on HTC, R404A and R502 on LTC

Experimental Investigation of the Effect of a Recuperative Heat Exchanger and Throttles Opening on a CO2/Isobutane Autocascade Refrigeration System

Investigation of the Efficiency of Autocascade and Cascade Heat Pumps in Cold Climate

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