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'''Adsorption refrigeration''' was invented by [[Michael Faraday]]<nowiki/>vin 1821. <ref name=":0" /> |
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It is very similar to [[Absorption refrigerator|absorption refrigeration]] (note that the second letter is different). The difference is that in adsorption refrigeration, the working fluid ([[refrigerant]] or adsorbate) molecules [[Adsorption|adsorb]] onto the surface of a [[solid]] instead of dissolving into a fluid. The step in which heat is added results in working fluid molecules desorbing from the solid. |
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⚫ | The typical adsorbate/refrigerant <ref name=":0">{{Cite web|title=Adsorption Refrigeration Research at Warwick|url=https://warwick.ac.uk/fac/sci/eng/research/grouplist/sustainableenergy/heatpumps/warwick_critoph.pdf|last=R.E. Critoph|first=R.E.|date=2007|website=warwick.ac.uk|url-status=live|archive-url=|archive-date=|access-date=2020-05-31}}</ref> used in adsorption systems are [[ammonia]], water, or [[methanol]], etc, which experiences phase changes between vapor state and liquid state - the same as in [[Vapor-compression refrigeration|vapor compression refrigeration]]; while the adsorbent is a solid, such as [[silicone gel]], [[activated carbon]], [[zeolite]], <ref name=":0" /> unlike in the [[absorption refrigeration]] where absorbent is usually liquid. With these differences in mind, most of what is said in the [[absorption refrigerator]] article applies to adsorption refrigerators. |
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The heat source for adsorption refrigeration can be: [[Fossil fuel]], [[Biofuel|Bio fuel]], [[Waste heat]], [[Solar thermal energy]]. <ref name=":0" /> |
The heat source for adsorption refrigeration can be: [[Fossil fuel]], [[Biofuel|Bio fuel]], [[Waste heat]], [[Solar thermal energy]]. <ref name=":0" /> |
Revision as of 03:19, 4 June 2020
Adsorption refrigeration was invented by Michael Faradayvin 1821. [1]
It is very similar to absorption refrigeration (note that the second letter is different). The difference is that in adsorption refrigeration, the working fluid (refrigerant or adsorbate) molecules adsorb onto the surface of a solid instead of dissolving into a fluid. The step in which heat is added results in working fluid molecules desorbing from the solid.
The typical adsorbate/refrigerant [1] used in adsorption systems are ammonia, water, or methanol, etc, which experiences phase changes between vapor state and liquid state - the same as in vapor compression refrigeration; while the adsorbent is a solid, such as silicone gel, activated carbon, zeolite, [1] unlike in the absorption refrigeration where absorbent is usually liquid. With these differences in mind, most of what is said in the absorption refrigerator article applies to adsorption refrigerators.
The heat source for adsorption refrigeration can be: Fossil fuel, Bio fuel, Waste heat, Solar thermal energy. [1]
Adsorption refrigerators are available in the marketplace and are mainly used to produce chilled water from waste heat.
Gas adsorption heat pumps are not currently available in the UK, but are just being introduced in Europe as small water or ground source packaged units for providing domestic low temperature space heating.[2]
References
- ^ a b c d R.E. Critoph, R.E. (2007). "Adsorption Refrigeration Research at Warwick" (PDF). warwick.ac.uk. Retrieved 2020-05-31.
{{cite web}}
: CS1 maint: url-status (link) - ^ "Gas driven heat pumps" (PDF). London: Department for Business, Energy & Industrial Strategy. September 2016.