crista shopis advanced energy conference october 13, 2011 2011... · crista shopis advanced energy...
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Crista ShopisAdvanced Energy ConferenceOctober 13, 2011
Innovation in Ultra-Efficient Air-Conditioning
Air conditioning = 16% of energy use and large system load peaks.
The Challenge
Air Conditioning = Reducing Air Temperature + Dehumidification
The Challenge
Source of the Idea: Cool Ground Temperatures
•“Free” source of “coolth”
•But: Well water temperatures not cold enough to dehumidify directly
The Idea
If we split an air stream, heat one of the two streams, and then pass both through a desiccant wheel, the heated and humidified air stream dewpoint will rise above the temperature of ground water.
In Slow MotionIf we split an air stream, heat one of the two streams, and then pass both through a desiccant wheel, the heated and humidified air stream dewpoint will rise above the temperature of ground water.
COOLING COIL GEOTHERMAL COOLING COIL WATER
MOISTURE CONDENSATE
DESICCANT WHEEL
HEAT SOURCE
AIR FROM BUILDING
AIR TO BUILDING
Psychrometric Chart
Ent
halp
y, B
tu/lb
(a)
Sat
urat
ion
tem
pera
ture
, F
Hum
idity
rat
io, l
b/lb
(a)
Pressure: 14.6959 psi
Dry bulb temperature, F50 60 70 80 90 100 110 120 130 140 150
0.010
0.020
0.030
20%
40%
60%
20
30
40
50
60 70
40
50
60
70
50
60
70
80
1 23
45
8
6
97
Efficiency – Original Projection
COEFFICIENT OF PERFORMANCE (COP)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Geothermal DesiccantCooling (Natural Gas Fired)
Ventilation Cycle DesiccantCooling
Absorption Cooling
CO
P
Efficiency – Lab Results
Efficiency: 1.85 COPSensible Heat Ratio: 0.74
Other Findings
Independent Temperature vs. Humidity controllability is outstanding
Sensible Heat Ratio from 0 – 1.0Typical air conditioner’s maximum Sensible Heat Ratio is about 0.75
The Vision: A simple four pipe fan coil
Possible heat sources:BoilerSolarWaste heat
60°F cooling “sink”:GeothermalLakeOceanLow-lift chiller
Industrial dehumidifier
US Potential
Summary
•A new cooling cycle
•Efficiency over 1.8 COP, likely higher
•Heat-fired: Fossil-fuel,solar, waste heat
•Quiet (no compressor)
•Outstanding humidity control
•A possible path to zero-energy buildings
Support – Thank You
•Taitem Engineering:•Idea•Prototype development•Continued technical and business support
•NYSERDA:•Feasibility Study•Demonstration project
•Syracuse Center of Excellence•Technology Application and Demonstration
…The future of air conditioning is here
• Questions?
Crista ShopisEmail: [email protected]: 607.277.2119
Synairco, Inc.110 South Albany StreetIthaca, NY 14850www.synairco.com