Performance evaluation of a vapor injection refrigeration system using mixture refrigerant R290/R600a

Dangelo, José Vicente Hallak; Aute, Vikrant; Radermacher, Reinhard

doi:10.1016/j.ijrefrig.2016.01.019

Cited by 51 publications

(14 citation statements)

References 39 publications

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“…In the present work, the following temperatures were fixed: evaporator inlet is -23.3 °C and saturated vapor in condenser is at 54.4 °C. These specifications correspond to case A in the analysis of D'Angelo [7] and result in a behavior of maximum for COP as a function of mixture refrigerant composition. These temperatures were defined based on the ASHRAE standard single point condition used for rating refrigerator/freezer compressors.…”

Section: Temperature Glide Differencementioning

confidence: 79%

“…Figure 1. Schematic of the vapor injection refrigeration cycle with flash tank (extracted from [7]).…”

Section: Description Of the Refrigeration Cycles 21 Vapor Injection mentioning

confidence: 99%

“…D'Angelo et al [7] developed a parametric analysis for some process operating variables of a vapor injection refrigeration system with flash tank using mixture refrigerant R290/R600a. These authors elected COP, refrigerant temperature glide and others parameters as metrics to identify working cycle conditions associated to higher efficiencies.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exergy Analysis of a Vapor Injection Refrigeration System with Flash Tank using Refrigerant Mixture R290/R600a

Araujo¹,

Carvalho²,

Dangelo³

2016

Modelling, Simulation and Identification / 841: Intelligent Systems and Control

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Refrigeration systems are major consumers of energy. To reduce this energy consumption, alternative cycles have been studied and one of the most important is the refrigerant injection system. In the last decades, the environmental restraints of refrigerants have increased and refrigerant mixtures have attracted attention. In this context, this work presents the energy and exergy analyses for a conventional vapor compression refrigeration cycle (VCC) and an alternative vapor injection cycle with flash tank (FTVI) using a mixture refrigerant of R290/R600a. The influences of refrigerant mixture composition and expansion ratio in the upperstage valve on energetic and exergetic performance parameters were evaluated. Free expansion and heat transfer were identified as the greatest irreversibilities in VCC and FTVI, respectively, accounting for 26.7% and 23.6% of total exergy inputs in these systems. Higher values of efficiency metrics were observed at around 40% wt of R290 for both cycles. Reasons for the observed behaviors and ways to improve the cycles from the thermodynamic perspective are identified and discussed.

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Section: Temperature Glide Differencementioning

confidence: 79%

“…Figure 1. Schematic of the vapor injection refrigeration cycle with flash tank (extracted from [7]).…”

Section: Description Of the Refrigeration Cycles 21 Vapor Injection mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exergy Analysis of a Vapor Injection Refrigeration System with Flash Tank using Refrigerant Mixture R290/R600a

Araujo¹,

Carvalho²,

Dangelo³

2016

Modelling, Simulation and Identification / 841: Intelligent Systems and Control

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show abstract

“…Currently, some of the most explored alternative refrigeration cycles are ejector refrigeration, cascade, and refrigerant injection systems. 4 For air source heat pump, the vapor injection technology has been applied in the system with two-stage compressor in order to cool the compressor and increase the super-cooling of the refrigerant condensation. Refrigerant vapor injection technique has been well justified to improve the performance of systems in refrigeration applications.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of single-stage air source heat pump utilizing indirect vapor injection design

Lai

Luo

et al. 2018

Advances in Mechanical Engineering

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This study investigated the performance of a single-stage scroll compressed air source heat pump coupled with a flash tank indirect vapor injection. In the refrigerant circulating piping of the heat pump, an indirect vapor injection piping connecting a flash tank at the refrigerant outlet of a condenser and the suction of a scroll compressor was designed. By the indirect refrigerant vapor injection from the flash tank, the saturation pressure and temperature of the refrigerant (R134a) in the evaporator can be raised and the sub-cooling of the refrigerant at the inlet of expansion valve can be enlarged as well. Thus, energy consumption of the compressor can be reduced and cooling capacity of the evaporator can be boosted. It was found that the suitable amount of indirect vapor refrigerant strongly depends on the operational environmental temperatures. By adjusting the suitable indirect vapor injection volume into the compressor, the performance of the heat pump was enhanced. In this study, a suitable indirect vapor injection volume was found and 5~15% performance increments can be obtained while the heat pump operated under ambient temperatures in a range from 5°C to 35°C.

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“…Currently, some of the most explored alternative refrigeration cycles are ejector refrigeration, the cascade system, and the refrigerant injection system. (5) Vapor injection technology has been applied in systems with a two-stage compressor in order to cool down the compressor and increase the subcooling of the refrigerant condensation. The refrigerant vapor-injection technique has been well demonstrated to improve the performance of systems in refrigeration applications.…”

Section: Introductionmentioning

confidence: 99%

Intelligent High-performance Dynamic Control for Two-stage Screw High-temperature Heat Pump System

Luo¹,

Lai²,

Hsieh³

et al. 2018

Sensors and Materials

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In this study, we developed a new type of water-to-water two-stage screw heat pump with a vapor injection flash tank and investigated the performance of the heat pump under various condensation temperatures of the refrigeration cycle. In addition to the flash tank, a floodedtype evaporator and a shell-tube oil cooler for refrigeration oil heat recovery are implemented in the heat pump system. Suitable vapor injection pressures corresponding to different condensation temperatures were found. It was also found in this study, that with a suitable vapor injection pressure for operation, the average coefficient of heating performance can be enhanced by the investigated heat pump system under various condensation temperatures. An intelligent controlling strategy in terms of the subcooled degree was developed to attain the dynamic high performance of the heat pump under different condensation temperatures. From the performance measurements, it can be found that the average heating capacity improvement of 29% and the performance enhancement of 11% can be achieved by the two-stage water-towater heat pump by utilizing the controlling strategy to adjust the vapor injection and the oil heat recovery under different condensation temperatures.

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Performance evaluation of a vapor injection refrigeration system using mixture refrigerant R290/R600a

Cited by 51 publications

References 39 publications

Exergy Analysis of a Vapor Injection Refrigeration System with Flash Tank using Refrigerant Mixture R290/R600a

Exergy Analysis of a Vapor Injection Refrigeration System with Flash Tank using Refrigerant Mixture R290/R600a

Performance analysis of single-stage air source heat pump utilizing indirect vapor injection design

Intelligent High-performance Dynamic Control for Two-stage Screw High-temperature Heat Pump System

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