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Heat Pumps for Heating and Cooling The refrigerant should be non-toxic, environmentally friendly (e.g. non-ozone depleting and low global warming potential, GWP), non-flammable, chemically stable, non-corrosive, and completely miscible or not miscible with the machine oil. A large number of refrigerant compounds exist and choosing the right refrigerant depends on the purpose of use. In the following paragraphs, a few refrigerants are presented. • Probably, the most famous refrigerants are Chloro-Fluoro-Carbons (CFC), also called Freons. They were very popular in refrigerant technology applications for long time. However, they were found to be harmful to the ozone layer and now many of the CFC compounds are banned by law in almost all countries. R11, R12, R502 and R13B1 are examples of CFCs. • Hydro-Chloro-Fluoro-Carbons (HCFC) are similar to CFCs. Like CFCs, HCFCs are harmful to the ozone layer and are banned in new applications. R22 and R401a are examples of HCFCs. • Hydro Fluorocarbons (HFC) and Halogen free refrigerants are used in place of CFCs and HCFCs. HFCs do not contain chlorine and they are harmless for the ozone layer. R134a and R404a are HFCs. 5.8. Air Source Heat Pumps – Delivery Configurations The vast majority of Air Source Heat Pumps generally fall into three distinct categories: 1. Portable Window Type Heat Pumps 2. Ductless Mini-split Type Heat Pumps 3. Ducted Split and Packaged Type Heat Pumps 5.8.1. Portable Window Type Heat Pumps Due to their small size and relatively low cost, window-mounted or through-the-wall portable air conditioners are used in small spaces such as shops, offices as well as private residences. These are factory assembled, shop tested modular equipment that do not require field-installed connections other than fixing in a standard opening. The capacity range is about 0.5 to 2 tons (~1.75 to 7 kW). Window heat pumps can also serve as dehumidifiers for treating moist air. If dehumidification is a major concern, consider purchasing the unit with a larger dehumidification capacity. 71PDF Image | Heat Pumps for Heating and Cooling
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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