Report No. G100463637MID-005R2 Report Revised Date: January 26, 2015
Page 9 of 15
Client: Dectra Corporation
Model: WHS2000
III.
PROCESS DESCRIPTION
III.A.
DISCUSSION
RUN #1 (October 3, 2011). The starting temperature in the heat storage vessel was 120.28 o F. Burn time was 2.70 hours and ended with a heat storage vessel temperature of 172.2 o F. RUN #2 (October 4, 2011). The starting temperature in the heat storage vessel was 125.6 o F. Burn time was 2.77 hours and ended with a heat storage vessel temperature of 179.1 o F. RUN #3 (October 5, 2011). The starting temperature in the heat storage vessel was 124.7 o F. Burn time was 2.85 hours and ended with a heat storage vessel temperature of 180.5 o F.
III.B.
UNIT DIMENSIONS
Overall dimensions are 71.75-in wide, 122.5-in deep, 76.75-in high.
III.C.
AIR SUPPLY SYSTEM
Combustion air enters from a fresh air intake located on the rear of the unit. The air travels to a collar in the front of the unit where it enters the firebox via primary and secondary combustion air nozzles. The movement of combustion air is aided by a constant 3600 RPM induced-draft combustion air blower. Combustion products flow through a heat exchanger system before exiting through a 6-in flue collar located at the top back of the outer enclosure. Combustion air is terminated by an electronic digital controller. The controller compares the flue and water temperatures until they fall to within 5 °F of each other. The blower is then turned off and combustion air is terminated.
III.D.
OPERATION DURING TEST
The boiler is operated until the entire fuel load is consumed and there is no further combustion in the firebox. The end of the test is determined when the water storage temperature is no longer increasing.
III.E TEST FUEL PROPERTIES
The fuel used was Quercus Ruba L. (Oak, Red). The fuel was split cordwood with cross sectional dimensions approximately 3 to 7 inches x 24 inches in length. The fuel was dried to average moisture content between 19% and 25% on a dry basis. Individual pieces weighed between 6 and 13.5 pounds with an average weight of 8.7 pounds.
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