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Low Temperature Space Heating Systems. Dr. Evgueniy Entchev CMX 2012 Learning Forum March 22, 2012. Drake Landing Solar Community. Largest Solar Community project in North America Location Okotoks, Alberta - 20 km south of Calgary Subdivision of 52 homes space and water heated by solar. - PowerPoint PPT Presentation
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Low Temperature Space Heating Systems
Dr. Evgueniy Entchev
CMX 2012 Learning Forum March 22, 2012
Drake Landing Solar Community
Largest Solar Community project in North America
Location Okotoks, Alberta - 20 km south of Calgary
Subdivision of 52 homes space and water heated by solar
End-user space heating utilization systemThe designed system must beable to :
Provide comfort while utilizing renewable source
Work with fluid incoming temperature from 65oC – 35oC
Provide heat recovery from the exhaust house air
Return Plenum
Supply Plenum
Heating Coil
HRV
Blower
HW outTw1 Tw2
Ta1
Ta2
HW in
Ta6
Ta7
Ta3
Ta4
Ta5
Fresh air To outside
House exhaust air
Preheated air temperature
Air HandlerTo achieve the required
versatility - vary 3 parameters
Air flow
Water Flow
Water Temperature
Design of low temperature AH
Ability to vary the air flow as a function of the incoming fluid temperature
Use baffles to provide an ~ even air distribution over the coil
Use high efficient blower motors - ECM to save energy
Re- design the heating coil to get as max heat as possible at given air flow velocity
Design of low temperature AH Use highly insulated
stratified tank
Use high efficient DC water pumps
Vary the water flow as a function of the outdoor temperature to preserve the stratification in the tank
Design of low temperature AH
Use at least 3 control set points 35oC, 50oC, 65oC
Use AI learning algorithms to optimize the system operation and comfort delivery
Utilize as many modulating devices
Input Layer(8 inputs)
1
2
3
4
5
6
7
8
Stack Current
Stack Voltage
1 Hidden Layer
(10 neurons)
1
2
Output Layer(2 outputs)
Stack Fuel Flow
Stack Temp.
Stack Air Flow
Stack Air Inlet Temp.Burner Fuel FlowBurner Combustion Temp.Burner Air Inlet Temp.
Burner Air Flow
Thank You!