dectron_design - RJI-Sales.com
dectron_design - RJI-Sales.com
dectron_design - RJI-Sales.com
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Performance Data<br />
Natatorium<br />
Smart Saver Heat Recovery Coils<br />
Any DRY-O-TRON® that has an exhaust<br />
fan option can also have the<br />
Smart Saver heat recovery coils option.<br />
These coils extract the heat from the<br />
exhaust air stream and transfer it to<br />
the outdoor air stream using a passive<br />
refrigerant system loop. The heat<br />
recovery coils are charged with R-22.<br />
Due to the nature of the refrigerant<br />
with its high volumetric difference<br />
between liquid and gas (1:40), the<br />
recovery system does not require any<br />
mechanical moving parts.<br />
The coils are arranged so that the<br />
refrigerant in the condenser coil (outdoor<br />
air intake) drains into the evaporator<br />
coil (exhaust air).<br />
The heat recovered is determined by<br />
the temperature difference between<br />
indoor air and outdoor air. Here below<br />
is a quick and simple procedure to<br />
calculate the savings :<br />
DRY-O-TRON ® Smart Saver Heat Recovery Coils Payback Analysis<br />
POOL LOCATION : Chicago Bin Data (see table at right)<br />
(T1) O/A average temp : 51 °F (10.5°C)<br />
(T2) Winter <strong>design</strong> temp : -8 °F (-22°C)<br />
(T3) Indoor <strong>design</strong> temp : 82 °F (27.7°C)<br />
(V) O/A volume : 4500 CFM<br />
(N) Occupied hours : 12 hours<br />
Energy cost :<br />
0.55$/100,000 Btu<br />
(n) Energy efficiency : 80% (Efficiency of space heating system)<br />
(hre) Heat recovery efficiency : 50 %<br />
Annual heat recovered :<br />
Q = (T3-T1)*1.08*V*(8760*N/24)*hre<br />
= 329,945,400 Btu per year<br />
Annual savings :<br />
= (Q*$/100,000 Btu)/n = $2,268.37 per year<br />
Reduction in space heating : = (T3-T2)*1.08*V*hre = 218,700 Btu/h<br />
In most applications, the average payback is in the two-year range.<br />
Outdoor air represents a major wintertime heating load. The energy recovered<br />
by the DRY-O-TRON® Smart Saver heat recovery coils cuts that load in half. This<br />
can be a noteworthy initial cost saving in the space heating system as well.<br />
Contact Dectron Inc. for your copy of our quick calculation software.<br />
City<br />
Average Winter<br />
° F DB 1 ° F DB 2<br />
Albuquerque 57 12<br />
Amarillo 57 6<br />
Atlanta 61 17<br />
Birmingham 62 17<br />
Bismarck 42 -23<br />
Boise 51 3<br />
Boston 51 6<br />
Brownsville 73 36<br />
Buffalo 43 2<br />
Charleston 64 24<br />
Cheyenne 46 -9<br />
Chicago 51 -8<br />
Cleveland 50 1<br />
Dallas 65 18<br />
Dayton 52 -1<br />
Denver 50 -5<br />
Des Moines 50 -10<br />
Detroit 49 3<br />
Dodge City 54 0<br />
Edmonton 35 -29<br />
El Paso 64 20<br />
Great Falls 45 -21<br />
Indianapolis 52 -2<br />
Kansas City 56 2<br />
Lake Charles 68 9<br />
Las Vegas 66 25<br />
Los Angeles 61 41<br />
Medford 52 19<br />
Miami 75 7<br />
Minneapolis 45 -16<br />
Montreal 44 -16<br />
Nashville 60 9<br />
New York 54 11<br />
Oklahoma City 60 9<br />
Omaha 51 -8<br />
Phoenix 72 31<br />
Pittsburgh 50 3<br />
Portland, ME 46 -6<br />
Portland, OR 53 17<br />
Salt Lake City 52 3<br />
San Antonio 68 25<br />
Seattle 51 20<br />
St Louis 55 2<br />
Tampa 71 19<br />
Tallahassee 67 27<br />
Toronto 46 -5<br />
1<br />
Per ASHRAE bin data<br />
2<br />
99% <strong>design</strong><br />
ENERGY RECYCLING DEHUMIDIFIERS & POOL WATER HEATERS FOR NATATORIUMS<br />
25
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