| OCR Text |
Show LABORATORY TEST STATION Shown in Figure 2 is a schematic of the laboratory test station to evaluate the Cold Water Hot Water Swirt Air CO ppm Flame ~ Flowmeter : Burner ~D :-- - - - - - - - - - - - - - - . - - - - I, _ F_lo_wm_e_te_r __ JI V~r:::s. Figure 2: Schematic of Testing Station performance of the WSB in the Telstar Spa Heater. As mentioned earlier, the heat exchanger normally runs at 15 kW (50,000 Btu/h) but it has an allowable power range of up to 25 kW (85,000 Btu/h). It is 23 cm (9") tall and has a rectangular interior, 20 x 16.5 cm (8" x 6.5") with six parallel fin-and-tube sections crossing 4 cm (1.5") below the exit of heat exchanger. As this heat exchanger was developed for extracting radiative heat from conventional rack burners, the water tube circuit is wrapped around the outside of the heat exchanger three times before leaving the heat exchanger housing. The Telstar chimney mounted on top of the heat exchanger has an exhaust diameter of 10 cm (4") that is blocked by a cap to force the combustion exhaust to flow out radially between heat dissipating fins. In order for the computer to calculate the air flow and equivalence ratio, two turbine meters measure the gas and premixture volumetric flow rates. High pressure water lines supply between 0 to 40 liters/min (0 to 10 gaVmin) to the heat exchanger with an accuracy of ± 2%. Calibrated, high precision (± 0.10 C) thermometers measure water temperatures before and after the heat exchanger. These thermometers are used as a references to calibrate six Type T thermocouples that measure temperatures to within ± 0.25 °C. Four thermocouples are used to measure the water temperatures entering and exiting the heat exchanger. A fifth thermocouple placed at the chimney measures the 6 |
