solar thermal collectors heatsolar thermal popularity lags behind pv because: 1. solar thermal...
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THERMAL-MASS FOUNDATION
SOLAR THERMAL COLLECTORS
HEAT
By: Pauline B Guntlow, Designer/General Contractor Copyright 2018
[email protected] 802 823 5328
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REASON PHOTOVOLTAIC (PV) IS MOREPOPULAR THAN SOLAR THERMAL
.
1. Energy efficiency of house does not matter.
2. Front money to lease PV is available to home owner.
3. Electric companies will supply or credit excess production.
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SOLAR THERMAL POPULARITY LAGS BEHIND PV BECAUSE:
1. Solar thermal requires energy efficient structure.
2. System requires method to “store” heat when sun does not shine.
3. The “how to” technology for solar thermal is far less publicized than info about PV’s.
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CLOSED LOOP THERMAL SOLAR COLLECTORS
ACTIVE SOLAR
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DEBTH OF ROOF OVERHANG DEPENDS ON LATITUDE
Sketch by: Marsh Ass.Boulder, CO
PASSIVE SOLAR
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NICK’S RETROFIT SKI LODGE
1. 3000 s.f. concrete floor & earth removed to 16”.
2. Used 2” rigid insulation to line box; layered sand with PEX tubing grid, to store heat; added more sand and another PEX grid for radiant heat.
4. Insulated the exterior of house; replaced windows with triple pane.
5. Installed 27 solar thermal collectors on barn roof.
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27 SOLAR THERMAL COLLECTORS ON BARN ROOF - Heat transferred Underground 75 feet.
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THERMAL-MASS FOUNDATION
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Grid I - Pre-heats water and thermal-mass
Grid II - Heats potable water & radiant floors
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If glycol fluid reaches excessive temperature, fluid flows to underground loop, where soil is 55 degrees ….
Or heat can be diverted, i.e. – a swimming pool.
GRID III – EXTERIOR LOOP
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Anti freeze solution does not mix with domestic water
HOT WATER HEATER
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INSULATED CONCRETE FORMS (ICF’s)
Rated R-24 (Sufficient for exterior temperature below 0 degrees)
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PEX TUBING CONNECTIONS IN MECHANICAL ROOM
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GRID 1: SOLAR THERMAL LOOP PREHEATS WATER,
FLOWS THRU THERMAL-MASS TO SHED HEAT
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COMPACTED SAND LAYER
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L
GRID 2: RADIANT LOOP HEATS:POTABLE WATER and RADIANT FLOORS
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O
CONCRETE SLAB COVERS - 6 “ FLOWABLE FILL LAYER
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HOUSE PARTIALLY FRAMED
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LONG SIDE OF HOUSE (52 feet) FACES SOUTH –ROOF HAS THREE FOOT OVERHANG
S
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eatingH
(RADIANT HEATS BOTTOM HALF OF ROOM)INHABITANTS ARE WARMED AT LOWER TEMP.
TEMPERTURE
Drawing: Warmboard
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RADIANT USED FORSECOND FLOOR
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MECHANICAL ROOM
1. Floor constructed 4 inches lower than main floor, with drain.
2. Walls insulated with foam to reduce any noise.
3. Plywood used for walls to attach apparatus.
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119 GALLON WATER TANK
50 Gallon Water Tank, Expansion Tank
CONTROLS
PLUMBING EQUIPMENT
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FILLING SOLAR THERMAL COLLECTOR LOOP, with 35 GALLONS of NON-TOXIC ANTI FREEZE
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OPEN CELL SPRAY FOAM INSULATION
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WHOLE HOUSE VENTILATION SYSTEM
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MARVIN THERMOPANE WINDOWS
Each main room had
Each main room has window facing south
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EXTERIOR WRAPPED WITH INSULATION WITH RAIN SCREEN
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AET COLLECTORS HAVE “SRCC” CERTIFICATION CERTIFICATION”
SOLAR THERMAL FLAT PLATE COLLECTORS
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SOLAR THERMAL COLLECTORS
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BAMBOO FLOORING OVER RADIANT HEAT
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CONCRETE FLOOR STAINED BROWN ENHANCES PASSIVE
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KITCHEN FLOOR AREA NOT SCORED
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OPEN FLOOR PLAN
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FLOORS REPLICATE LARGE BLOCKSOF GRANITE
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SOUTHERN EXPOSURE ENHANCES PASSIVE SOLAR
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STAINED AND SCORED CONCRETE FLOOREFFICIENT WOOD BURNING STOVE
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CATHEDRAL CEILING IN LIVING AND DINING AREA
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WINDOWS POSITIONED ON WEST SIDE TAKE ADVANTAGE OF VIEW
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STANDING SEAM METAL ROOF
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HOUSE RECEIVES FIVE STAR ENERGY RATING
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Average monthly Propane co. estimate (without thermal-mass): $163
Average monthly cost for Jordan’s house: $72
Average estimated cost for natural gas: $35
GOAL WAS MET …
Solar thermal home built in Vermont in 2010