scholarly journals Next Generation Refrigeration Lubricants for Low Global Warming Potential/Low Ozone Depleting Refrigeration and Air Conditioning Systems

2013 ◽  
Author(s):  
Edward Thomas Hessell
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Air Conditioning ◽  
Next Generation ◽  
Air Conditioning Systems ◽  
Low Global Warming Potential

scholarly journals Refrigerating fluid with a low global warming potential for automotive air conditioning systems in summer

2021 ◽  
pp. 45-45
Author(s):  
Zhaofeng Meng ◽  
Yin Liu ◽  
Dingbiao Wang ◽  
Long Gao ◽  
Junhai Yan
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Air Conditioning ◽  
Cooling Capacity ◽  
Automotive Air Conditioning ◽  
Discharge Temperature ◽  
Air Conditioning Systems ◽  
Low Global Warming Potential ◽  
Lower Discharge

Refrigerants with low global warming potential (GWP) are much needed in automotive air conditioning systems. This paper compares two refrigerants, R134a (GWP=1300) and R513A (GWP=573) experimentally. The results show that the latter has lower cooling capacity, lower COP and lower discharge temperature than the former, revealing that R513A is a promising replacement of its high GWP partner.

scholarly journals Energy and Exergy Analysis of Low-Global Warming Potential Refrigerants as Replacement for R410A in Two-Speed Heat Pumps for Cold Climates

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5666
Author(s):  
Bo Shen ◽  
Moonis R. Ally
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Heat Pumps ◽  
Department Of Energy ◽  
Cold Climates ◽  
Pump Design ◽  
Oak Ridge ◽  
Low Global Warming Potential

Heat pumps (HPs) are being developed with a new emphasis on cold climates. To lower the environmental impact of greenhouse gas (GHG) emissions, alternate low global warming potential (GWP) refrigerants must also replace the exclusive use of the refrigerant R410A, preferably without re-engineering the mechanical hardware. In this paper, we analyze the performance of four low-GWP alternative refrigerants (R32, R452B, R454B, and R466A) relative to the conventional R410A and draw conclusions on the relative performances for providing heating in cold climates based on the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) 210/240 standard for two-speed heat pumps. The simulations are carried using the Department of Energy, Oak Ridge National Laboratory (DOE/ORNL) Heat Pump Design Model (HPDM), a well-known heating, ventilation, and air conditioning (HVAC) modeling and design tool in the public domain and the HVAC research and development community. The results of the simulation are further scrutinized using exergy analysis to identify sources of systemic inefficiency, the root cause of lost work. This rigorous approach provides an exhaustive analysis of alternate low-GWP refrigerants to replace R410A using available compressors and system components, without compromising performance.

LOW GLOBAL WARMING REFRIGERANTS FOR RESIDENTIAL AIR CONDITIONING APPLICATIONS

2014 ◽  
Vol 22 (02) ◽  
pp. 1440005 ◽  
Author(s):  
MARK SPATZ ◽  
SAMUEL YANA MOTTA ◽  
CHRISTOPHER SEETON ◽  
YONGMING NIU
Keyword(s):  
Global Warming ◽  
Thermal Properties ◽  
Environmental Impact ◽  
Thermal Performance ◽  
Global Warming Potential ◽  
Air Conditioning ◽  
Flammability Characteristics ◽  
R 134A ◽  
Residential Air Conditioning ◽  
Air Conditioning Systems

Due to the growing global concerns around the use of refrigerants with relatively high global warming potential, new refrigerants with the positive attributes of both high thermal performance and low environmental impact are currently in development by Honeywell. These new refrigerants exhibit promising performance when compared with refrigerants currently used in stationary AC systems such as those that use R-410A, R-407C, and R-134a, for example. These new refrigerants also show significantly lower flammability characteristics than the much more flammable hydrocarbons. Replacements of common HFC refrigerants such as R-410A and R-407C are discussed for residential air conditioning applications. Thermal properties as well as experimental results in representative air conditioning systems are presented, showing the benefits of using these new refrigerants.

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