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DHW Pond Solar Water Heater Tests

 

Prototype 2:

 

These are some working results from a few tests aimed at refining the DWH pond into a workable configuration.  Any ideas would be appreciated.

 

DWH Pond Model

 

Manifold Test

 

Prototype 2 Construction

 

Floating Lid Flow Test 07/05

 

Floating Lid - Sprinkler 050709

 

Floating Lid Flow Test 05/07/09

 

Floating Lid Flow Test 05/07/10

 

Floating Lid Flow Tests 05/07/12 and 13 

 

 

Hourly sim run Billings, Jan, 30sqft collector, North reflector, 6 inch depth

 

Hourly sim run Billings, Jan, 30sqft collector, North reflector, 12 inch depth

 

Hourly sim run Billings, July, 30sqft collector, North reflector, 6 inch depth

 

Hourly sim run Billings, July, 30sqft collector, North reflector, 12 inch depth

 

Hourly sim run Billings, Jan, 60sqft collector, No reflector, 6 inch depth

 

The definitions of the data in each column are:

Mo                Month            eg Jan = 1

Day              Day of month

Hour             Hour of day

Tamb           Ambient temp F

Itot                Total solar radiation (direct + diffuse) from TMY

IDHWtot       Total radiation on surface of collector

I45DHWtot   Total radiation if collector were titled at 45 deg

QGain           Collector gain for hour  BTU

QLoss           Collector loss for hour BTU

QNet             QGain - QLoss

Qdraw          Heat removed by a hot water draw (BTU)    (20% of 30 gal at 8am, 80% at 4pm)

Tstor             Storage temperature at end of hour (including effect of a draw if any)

 

The unlabeled numbers in last column are the fraction of hot water provided by solar pond.

 

 

 

 

 

 

 

 

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