Space conditioning using evaporative cooling for summers in Delhi

The article examines the possibility of space conditioning the interiors of a multistorey office building in Delhi using evaporative cooling in the su mmer months of April, May and June. The temperature and humidity conditions obtained in a room of the building with direct evaporative cooling are stu died by simulation. In this case study, the room is assumed to have a south -facing wall with a window and all other walls, ceiling and floor are inter ior partitions. The effect of number of air-changes per hour (ACH) from 1 t o 40 and fresh-air bypass factor (BPF) 0% to 100% on performance is studied by simulation. The aim is to find whether some combination of ACH and BPF succeeds in keeping room conditions below 80% RH and temperatures between 2 7 and 31 degrees C, depending on RH. It is found that the desired results a re achieved by keeping the ACH and the BPF within certain limits depending on weather conditions. If the temperature and relative humidity of the ambi ent air are too high then a direct evaporative cooler cannot achieve comfor t in the room. Appropriate combinations of ACH and BPF have to be selected to obtain the best results. (C) 2000 Elsevier Science Ltd. All rights reser ved.