In three previous articles, we have presented an overview of CO2 (R-744) as a refrigerant, its applications in industrial refrigeration, and a case study of a CO2 cascade system in a European supermarket. (See "CO2 in Refrigeration Applications," Oct. 6, 2003; "CO2 in Industrial Refrigerati...
CO2 refrigerant with heating performance superior to that of HFC refrigerants can be adopted even for heating uses other than supplying hot water.In this study, the following measures were taken for the construction of a compact heat pump system for drying using CO2 as a refrigerant. 1) High ...
The advantages of CO2 as a refrigerant Climate-neutral environmentally friendly refrigerant R744 (CO2) Without environmentally hazardous decomposition products No additional contribution to the greenhouse effect (GWP = 1) Does not contribute to the ozone depletion (ODP = 0) ...
Experimental work has been carried out to investigate the heat transfer performance of fin and tube heat exchangers using CO2 as a refrigerant with taking PAG oil into account. From previous study it was found that the heat transfer performance decreased significantly in both evaporator and gas...
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A CO2 refrigeration system (1) includes: a compressor (3), a gas cooler (5), a temperature sensor (17) and an electronic control system (13), the electronic control system including a processor device (15) arranged to control operation of the compressor (3) according to input signals rece...
CO2refrigerant as an alternative to CFCs Refrigerant is used in home appliances such as air conditioners and refrigerators to transfer heat from low temperature locations to high temperature locations. CFC gas (R404A), which was previously one of the most commonly used refrigerants, has a global wa...
Carbon Dioxide Refrigerant, Also Known As R744 Refrigerant, Refers To a Mixture Of Carbon Dioxide And Hydrocarbons As The Main Component Of The Refrigerant. Compared With Traditional Refrigerants, Carbon Dioxide Refrigerants Have The Characteristics Of Good Chemical Stability...
In Figure 5, the saturation lines SLE, SVE and VLE are also depicted, where the VLE line is presented with its gas and liquid branches merging at the CP. Figure 5 reveals that CO2 can be found with densities well above the density of water (1000 kg/m3), either as a solid...
CO2 (also known as R744) is a promising natural refrigerant with an ODP of zero, and a GWP of one that is only inferior to ammonia [8]. But if the factor of safety is taken into account, CO2 is neither explosive nor toxic while ammonia is both flammable and poisonous [9]. ...