Desiccant-Humidifier Cycle Refrigeration: Difference between revisions
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=Basics= | =Basics= | ||
*A type of Refrigeration Cycle that uses a combination of evaporative cooling (endothermic cool end), and dehumidification via | *A type of Refrigeration Cycle that uses a combination of evaporative cooling (endothermic cool end), and dehumidification via desiccant(s) (exothermic hot end) to pump heat | ||
*Can be used for [[Solar Air Conditioning]] | *Can be used for [[Solar Air Conditioning]] | ||
*Is also | *Is also advantageous in it's design, and material simplicity | ||
=Plotting= | =Plotting= | ||
*Should the columns be randomly packed, packed, spray, or some hybrid | *Should the columns be randomly packed, packed, spray, or some hybrid | ||
*Little info on water evaporation (That [[User:Eric]] has found so far ) | *Little info on water evaporation (That [[User:Eric]] has found so far ) | ||
*[https://www.aiche.org/system/files/aiche-proceedings/conferences/404771/papers/483651/P483651.pdf A Whitepaper on CO2 Scrubber Tower Design] (this was for co2 scrubbing via | *[https://www.aiche.org/system/files/aiche-proceedings/conferences/404771/papers/483651/P483651.pdf A Whitepaper on CO2 Scrubber Tower Design] (this was for co2 scrubbing via ammonia absorption but compared the Spray Towers and Packed Columns) | ||
=Process= | =Process= | ||
[[File:Dessicant AC Diagram.jpg]] | [[File:Dessicant AC Diagram.jpg]] | ||
==Evaporative Cooling | ==Evaporative Cooling Column== | ||
*Room Temperature air is pushed in to a counter flow water sprayer | *Room Temperature air is pushed in to a counter flow water sprayer column with mesh/[[bioballs]] | ||
*The water evaporates and cools the air (at the cost of increased humidity) | *The water evaporates and cools the air (at the cost of increased humidity) | ||
*It is then sent to the | *It is then sent to the Desiccation Column | ||
== | ==Desiccation Column== | ||
*This works in a similar manner as the Evaporative Column, but it has the opposite goal, | *This works in a similar manner as the Evaporative Column, but it has the opposite goal, Desiccation of the Air Stream | ||
*It does this via a | *It does this via a desiccant, most likely a [[Liquid Desiccant]], due to ease of operation | ||
*Produces Fully Dry Air, and Saturated | *Produces Fully Dry Air, and Saturated Desiccant via Liquid Dessicant | ||
*Make an identical unit to the Evaporative Cooling | *Make an identical unit to the Evaporative Cooling Column, and replace the water with ?percent concentrated calcium chloride solution | ||
*Air sent to Humidity Control | *Air sent to Humidity Control Column (Optional), Liquid Desiccant sent to Regenerator | ||
==Humidity Control Collumn== | ==Humidity Control Collumn== | ||
*This takes the Fully Dry Air, and brings the humidity up to comfortable levels | *This takes the Fully Dry Air, and brings the humidity up to comfortable levels | ||
*It can use OTS humidifiers, or be a smaller version of the Evaporative Cooling | *It can use OTS humidifiers, or be a smaller version of the Evaporative Cooling Column | ||
*This stage is OPTIONAL | *This stage is OPTIONAL | ||
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=OSE Design= | =OSE Design= | ||
*[[Open Source | *[[Open Source Desiccant-Humidifier Cycle Based Liquid Chiller]] (Used with a [[Hydronic Cooling]] system, or just a spray tower for the air?) | ||
=Internal Links= | =Internal Links= | ||
*[[Liquid | *[[Liquid Desiccants]] | ||
=External Links= | =External Links= | ||
*[https://en.wikipedia.org/wiki/Solar_air_conditioning#Solar_open-loop_air_conditioning_using_desiccants The Wikipedia Page on Solar open-loop air conditioning using desiccants] | *[https://en.wikipedia.org/wiki/Solar_air_conditioning#Solar_open-loop_air_conditioning_using_desiccants The Wikipedia Page on Solar open-loop air conditioning using desiccants] | ||
*[https://www.youtube.com/watch?v=R_g4nT4a28U A video on a design by the | *[https://www.youtube.com/watch?v=R_g4nT4a28U A video on a design by the YouTube channel "Tech Ingredients"] | ||
Revision as of 04:32, 18 June 2021
Basics
- A type of Refrigeration Cycle that uses a combination of evaporative cooling (endothermic cool end), and dehumidification via desiccant(s) (exothermic hot end) to pump heat
- Can be used for Solar Air Conditioning
- Is also advantageous in it's design, and material simplicity
Plotting
- Should the columns be randomly packed, packed, spray, or some hybrid
- Little info on water evaporation (That User:Eric has found so far )
- A Whitepaper on CO2 Scrubber Tower Design (this was for co2 scrubbing via ammonia absorption but compared the Spray Towers and Packed Columns)
Process
Evaporative Cooling Column
- Room Temperature air is pushed in to a counter flow water sprayer column with mesh/bioballs
- The water evaporates and cools the air (at the cost of increased humidity)
- It is then sent to the Desiccation Column
Desiccation Column
- This works in a similar manner as the Evaporative Column, but it has the opposite goal, Desiccation of the Air Stream
- It does this via a desiccant, most likely a Liquid Desiccant, due to ease of operation
- Produces Fully Dry Air, and Saturated Desiccant via Liquid Dessicant
- Make an identical unit to the Evaporative Cooling Column, and replace the water with ?percent concentrated calcium chloride solution
- Air sent to Humidity Control Column (Optional), Liquid Desiccant sent to Regenerator
Humidity Control Collumn
- This takes the Fully Dry Air, and brings the humidity up to comfortable levels
- It can use OTS humidifiers, or be a smaller version of the Evaporative Cooling Column
- This stage is OPTIONAL
Dessicant Regeneration Module
- This is a module where the Saturated Liquid Dessicant is Heated to Concentrate it and thus regenenerate it.
- Passive solar is promising, but any heat source will do
- Also heat exchangers that utilize waste heat from the process for regeneration may improve efficiency further
Industry Standards
Open Source Designs
OSE Design
- Open Source Desiccant-Humidifier Cycle Based Liquid Chiller (Used with a Hydronic Cooling system, or just a spray tower for the air?)