Editing Refrigerant (section)

==Requirements and desirable properties==
A refrigerant needs to have: a [[boiling point]] that is somewhat below the target temperature (although boiling point can be adjusted by adjusting the [[pressure]] appropriately), a high [[heat of vaporization]], a moderate [[density]] in liquid form, a relatively high density in gaseous form (which can also be adjusted by setting pressure appropriately), and a high [[Critical point (thermodynamics)|critical temperature]]. Working pressures should ideally be containable by [[copper tubing]], a commonly available material. Extremely high pressures should be avoided.{{citation needed|date=July 2023}}

The ideal refrigerant would be: [[corrosive|non-corrosive]], [[toxicity|non-toxic]], [[flammability|non-flammable]], with no [[ozone depletion]] and [[global warming potential|global warming]] potential. It should preferably be natural with well-studied and low environmental impact. Newer refrigerants address the issue of the damage that CFCs caused to the ozone layer and the contribution that HCFCs make to climate change, but some do raise issues relating to toxicity and/or flammability.<ref name="increase">{{cite news |last=Rosenthal |first=Elisabeth |author2=Lehren, Andrew |date=20 June 2011 |title=Relief in Every Window, but Global Worry Too |newspaper=[[The New York Times]] |url=https://www.nytimes.com/2012/06/21/world/asia/global-demand-for-air-conditioning-forces-tough-environmental-choices.html?pagewanted=1&_r=1&hp |url-access=limited |access-date=21 June 2012}}</ref>