Comparative analysis of ionic liquids as sorptive media for absorption cooling systems.

Ariyadi, Hifni Mukhtar; Giannetti, Niccolò; Yamaguchi, Seiichi

doi:10.18462/iir.icr.2019.1033

Cited by 5 publications

(2 citation statements)

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“…The energy and exergy analysis are conducted based on thermodynamic analysis and mass balance equations which are listed in Eqs. (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16).…”

Section: Thermodynamic Modellingmentioning

confidence: 99%

Performance Evaluation of R1224yd as Alternative to R123 and R245fa for Vapor Compression Heat Pump System

AİSYAH,

ARİYADİ

2024

International Journal of Thermodynamics

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The search for environmentally friendly refrigerants for vapor compression systems has been a significant focus recently due to environmental concerns such as ozone depletion and global warming. In this study, the potential of R1224yd as an alternative refrigerant is investigated. A thermodynamic analysis of a 4-kW air conditioning system is conducted to assess the performance of R1224yd. The system is analyzed from a thermodynamic perspective, and key performance indicators such as the Coefficient of Performance and exergy efficiency. The results are then compared to R245fa and R123. Furthermore, a parametric study is performed to examine the impact of key parameters, such as evaporating and condensing temperatures, on the system's performance. This analysis provides insights into the sensitivity of the system's performance to variations in these parameters. The results indicate that R1224yd is a promising candidate as an environmentally friendly alternative refrigerant compared to R123 and R245fa. Because R1224yd has the lowest environmental impact. It has about 700 kg CO2 indirect emission, but about zero kgCO2 for direct emission. While, based on the thermodynamic results, R1224yd offers better performance compared to R245fa which has 1-3% higher in performance value and exergy efficiency, and has comparable performance to R123. This suggests that R1224yd can be a viable option for the systems, providing improved energy efficiency and lower environmental impact.

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“…The energy and exergy analysis are conducted based on thermodynamic analysis and mass balance equations which are listed in Eqs. (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16).…”

Section: Thermodynamic Modellingmentioning

confidence: 99%

Performance Evaluation of R1224yd as Alternative to R123 and R245fa for Vapor Compression Heat Pump System

AİSYAH,

ARİYADİ

2024

International Journal of Thermodynamics

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“…A prediction by CEMAC [14] suggests a 4.5-times increase in air conditioning demand for non-Organization of Economic Coordination and Development (OECD) countries and a 1.3-times increase for OECD countries. Considering the need to reduce greenhouse gas emissions while maintaining performance, selecting the refrigerant for heat pump applications is an essential stage in the design process [15][16][17]. For example, a R32 refrigerant in a Heat Pump Water Heater offers advantages such as low Global Warming Potential (GWP) and near-zero ozone depletion potential.…”

Section: Introductionmentioning

confidence: 99%

Energy Performance Analysis of R32 and R134a Refrigerant for Spring Pool Water Heater

Hadi,

Wijaya,

Elysabeth

et al. 2023

adeletters

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For a country with a tropical climate, such as Indonesia, heat pump technologies are usually necessary in high-altitude regions, where the temperatures tend to be cooler, such as a pool heater for an artificial hot spring swimming pool. A vapor compression heat pump’s optimal performance relies on its working fluid’s characteristics. This paper aimed to assess the performance and compare the time required to heat a hot spring pool using heat pumps with two different refrigerants: R32 and R134a. A thermodynamic modeling approach was employed to determine the better refrigerant choice between R32 and R134a for the heat pump, aside from other important factors that are considered when selecting the refrigerant, such as safety and environmental impacts. Comparing the results of R134a and R32 refrigerants, R134a has a higher GWP value than R32, indicating that R32 is more environmentally friendly. Regarding safety, R134a has low toxicity and flammability, while R32 exhibits low toxicity and mild flammability. Thus, R134a is considered safer than R32. Furthermore, the COP value of R134a was found to be higher than that of R32, indicating that R134a offers greater efficiency for the heat pump compared to R32.

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Design of the Organic Rankine Cycle (ORC) System Using R600 and R600a as Working Fluid

Megaprastio,

Zaka,

Zahra

et al. 2023

E3S Web Conf.

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Organic Rankine Cycle (ORC) is one of the alternative technologies for generating electricity from low to medium level heat sources. ORC operates at low temperatures and pressures using two types of organic working fluids. The organic working fluids as the refrigerants were chosen in the ORC system instead of water, which is suitable for high pressure and temperature applications. Since the performance and configuration of the ORC system rely on its working fluids, the selection of the working fluid for the ORC system becomes crucial. The system utilizes low-temperature heat sources as a supply of heat energy that flows through the evaporator and is then received by the working fluid to operate the cycle. In this study, two dry type working fluids, namely butane (R600) and isobutane (R600a), were used to thermally design an ORC to recover geothermal waste heat. The working fluids were designed using mathematical calculations based on thermodynamic laws. The results revealed that a slightly higher thermal efficiency value was achieved when using R600 as the working fluid, which was 12.8% compared to R600a.

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Comparative analysis of ionic liquids as sorptive media for absorption cooling systems.

Cited by 5 publications

References 0 publications

Performance Evaluation of R1224yd as Alternative to R123 and R245fa for Vapor Compression Heat Pump System

Performance Evaluation of R1224yd as Alternative to R123 and R245fa for Vapor Compression Heat Pump System

Energy Performance Analysis of R32 and R134a Refrigerant for Spring Pool Water Heater

Design of the Organic Rankine Cycle (ORC) System Using R600 and R600a as Working Fluid

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