Desiccant-Humidifier Cycle Refrigeration: Difference between revisions
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*This works in a similar manner as the Evaporative Column, but it has the opposite goal, Desiccation of the Air Stream | *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 | *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 | *Produces Fully Dry Air, and Saturated Desiccant via Liquid Desiccant | ||
*Make an identical unit to the Evaporative Cooling Column, and replace the water with ?percent concentrated calcium chloride solution | *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 | *Air sent to Humidity Control Column (Optional), Liquid Desiccant sent to Regenerator | ||
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*This stage is OPTIONAL | *This stage is OPTIONAL | ||
== | ==Desiccant Regeneration Module== | ||
*This is a module where the Saturated Liquid | *This is a module where the Saturated Liquid Desiccant is Heated to Concentrate it and thus regenerate it. | ||
*Passive solar is promising, but any heat source will do | *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 | *Also heat exchangers that utilize waste heat from the process for regeneration may improve efficiency further | ||
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=Open Source Designs= | =Open Source Designs= | ||
*[https://www.youtube.com/watch?v=R_g4nT4a28U A design by the | *[https://www.youtube.com/watch?v=R_g4nT4a28U A design by the YouTube channel "Tech Ingredients" ] | ||
=OSE Design= | =OSE Design= | ||
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 Desiccant
- 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
Desiccant Regeneration Module
- This is a module where the Saturated Liquid Desiccant is Heated to Concentrate it and thus regenerate 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?)