Difference between revisions of "Geothermal Heating and Cooling"
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** Air-to-Water Heat Pump | ** Air-to-Water Heat Pump | ||
*** Daikin Altherma Heat Pump | *** Daikin Altherma Heat Pump | ||
| − | *** Model: 3 Ton Split System (ERLQ036BAVJU) and Hydrobox (EKHBX054BA3VJU) ''(see 1 step vs. 2 step heating unit?)'' | + | **** Model: 3 Ton Split System (ERLQ036BAVJU) and Hydrobox (EKHBX054BA3VJU) ''(see 1 step vs. 2 step heating unit?)'' |
| − | **** Need split system to physically get into basement | + | ***** Need split system to physically get into basement |
| − | *** [http://www.nmdgreen.com/pdf/daikinaltherma-brochure.pdf Daikin Altherma heat pump unit] looks like the high end is coming to the US. Designed for our total problem...hot water, cooling, backup heat. | + | **** EKHWS050BA3VJU - hot water tank (50 gal) with EKSOLHWBAVJU - solar kit |
| − | *** [http://www.nmdgreen.com/pdf/daikinaltherma-brochure.pdf Altherma Brochure (large)] | + | **** [http://www.nmdgreen.com/pdf/daikinaltherma-brochure.pdf Daikin Altherma heat pump unit] looks like the high end is coming to the US. Designed for our total problem...hot water, cooling, backup heat. |
| − | *** [http://www.daikinac.com/residential/docsInstall_Altherma.asp?sec=docs&page=28 Altherma Installation Manuals] | + | **** [http://www.nmdgreen.com/pdf/daikinaltherma-brochure.pdf Altherma Brochure (large)] |
| + | **** [http://www.daikinac.com/residential/docsInstall_Altherma.asp?sec=docs&page=28 Altherma Installation Manuals] | ||
| + | *** Colmac Heat Pump | ||
| + | **** [http://www.colmaccoil.com/heatpumps/airsource/ Air Source Heat Pumps] | ||
| + | **** [http://www.colmaccoil.com/Whatsnew/PDF/ProductFlyers/AirSourceHeatPumpBrochure.pdf Colmac Heat Pump Brochure] | ||
| + | **** [http://www.bpa.gov/energy/n/emerging_technology/BPA-Evaluation_Reverse-Cycle-Chillers_09-30-09.pdf Government Evaluation of Air-to-Water Heat Pumps] Some very interesting findings. | ||
** Earth Room | ** Earth Room | ||
*** Purge strategy for vent capacity | *** Purge strategy for vent capacity | ||
| Line 41: | Line 46: | ||
***** 30R North and East (use rigid + cellulose)/ Zero R West and South | ***** 30R North and East (use rigid + cellulose)/ Zero R West and South | ||
***** Hardie board for inside wall surfaces | ***** Hardie board for inside wall surfaces | ||
| − | ***** 3 layers of rigid insulation | + | ***** 3 layers of rigid insulation = R30 |
| − | ****** Layer #1 - 2" polystyrene | + | ****** Layer #1 - 2" polystyrene |
****** Layer #2 + #3: 1ft - 2" polystyrene + 7ft+/- use polyiso | ****** Layer #2 + #3: 1ft - 2" polystyrene + 7ft+/- use polyiso | ||
****** Tape joints on the inside with Kenco Tape | ****** Tape joints on the inside with Kenco Tape | ||
| Line 52: | Line 57: | ||
***** Tape joints on the inside with Kenco Tape | ***** Tape joints on the inside with Kenco Tape | ||
***** Hardie board on walls and ceiling | ***** Hardie board on walls and ceiling | ||
| − | ***** | + | ***** caulk wall joints |
**** Floor | **** Floor | ||
***** Zero R | ***** Zero R | ||
Latest revision as of 17:09, 19 July 2010
return to Sustainable Detail Design Center
Requirements
- Backup Heating + Primary Cooling
- Based on a "recharge the tanks" model
- Peak Hour
- 50K BTU Heating
- 40K BTU Cooling
- "Peak Day" Hour <<== used this one
- Heating: 39K BTU per hour (using 24 hours)
- Cooling: 14K BTU per hour (using 12 hours)
Design / Selection
- Ideas
- use the natural thermal effects of the basement and earth tubes to gain higher performance from the heat pump...increases Cooling EER (from 12 to 17+)...will also affect COP
- Simplify the equipment (less is better)
- Design
- Air-to-Water Heat Pump
- Daikin Altherma Heat Pump
- Model: 3 Ton Split System (ERLQ036BAVJU) and Hydrobox (EKHBX054BA3VJU) (see 1 step vs. 2 step heating unit?)
- Need split system to physically get into basement
- EKHWS050BA3VJU - hot water tank (50 gal) with EKSOLHWBAVJU - solar kit
- Daikin Altherma heat pump unit looks like the high end is coming to the US. Designed for our total problem...hot water, cooling, backup heat.
- Altherma Brochure (large)
- Altherma Installation Manuals
- Model: 3 Ton Split System (ERLQ036BAVJU) and Hydrobox (EKHBX054BA3VJU) (see 1 step vs. 2 step heating unit?)
- Colmac Heat Pump
- Air Source Heat Pumps
- Colmac Heat Pump Brochure
- Government Evaluation of Air-to-Water Heat Pumps Some very interesting findings.
- Daikin Altherma Heat Pump
- Earth Room
- Purge strategy for vent capacity
- Location: Green Garage Basement
- Supply: 2 6" earth tubes
- build a condensation trap
- Exhaust: existing chimney
- Fan
- Located in chimney...pulls air through the room
- use thermostat to ...determine when fan goes on
- use ducts and hi/lo dampers in room
- need to have fan control balance temp vs. humidity (e.g. favor avoiding condensation vs. better performance temp)
- Thermal Mass
- Plastic bottles (2L) full of water in room on floor and metal racks
- Envelope
- No organic material in the envelope system to avoid mold
- Walls
- 30R North and East (use rigid + cellulose)/ Zero R West and South
- Hardie board for inside wall surfaces
- 3 layers of rigid insulation = R30
- Layer #1 - 2" polystyrene
- Layer #2 + #3: 1ft - 2" polystyrene + 7ft+/- use polyiso
- Tape joints on the inside with Kenco Tape
- Stud 4ft on center for the framing - caulked on floor
- caulk the floor joints (rigid to floor)
- Ceiling
- 40R ... use rigid polystyrene insulation
- 8" polystyrene (4 layers, of 2" w/ staggered joints) = R40
- Tape joints on the inside with Kenco Tape
- Hardie board on walls and ceiling
- caulk wall joints
- Floor
- Zero R
- Seal concrete w/ DEFY concrete sealer low-VOC
- Door
- 36" door + rigid insulation filler - tape shut painters tape
- Raised Equipment Platform: reuse block ... avoids flooding issues
- Air-to-Water Heat Pump
Rationale
- Connectedness to the earth
- net zero-energy
- simplicity
- repeatability
- affordability
