F - Mech Eng,Light,Heat,Weapons – 28 – B
Patent
F - Mech Eng,Light,Heat,Weapons
28
B
122/137
F28B 1/06 (2006.01) F28B 9/00 (2006.01) F28B 11/00 (2006.01)
Patent
CA 1190816
ABSTRACT OF THE DISCLOSURE Method and apparatus for improving the operation of forced-air-cooled steam condensors having a bank of air-cooled heat exchangers connected between steam lines and condensate conduits. Air is forced through the heat exchangers by fans, and shutters are provided to either discharge the spent air to atmosphere or to recirculate the spent air into the fan inlets to mix with fresh outside air. The steam pressure in the steam line is sensed along with the temperatures of the condensate in each exchanger and of outside air. The condensate conduits are in the recirculation path of spent air, and the fan is adjustable to control the quantity of air forced through the exchangers. By controlling the shutters and the fans in response to the pressure and temperatures, a highly-efficient cooling effect is achieved. According to the invention there are provided sensor-governed motor-driven roll-shutters (11), which more or less can screen the heat exchangers (12) and thereby create a recirculation channel (17) for the warmed up air, and there are furthermore provided sensor-governed adjustments of the blade angles of fans (13). The condensor (2) has an upper steam pipe line (9) and connected thereto the heat exchangers (12), which preferably are arranged trapezoid-like in two parts covering the lower fans (13), one for each so-called module, whereby a roll-shutter (11) is arranged outside of and at distance from each heat exchanger part, and whereby the roll shutters are rolled up close to the steam pipe-line (9). (Fig. 3)
388688
Beverskog Sven
Jakobsson Per-Olof
Flakt Aktiebolag
Gowling Lafleur Henderson Llp
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