23 September 2011

ENERGY SAVING OF AIR-CONDITIONING IN MASS MERCHANDISERS BY OPERATIONAL CHANGE OF AIR-CONDITIONING SYSTEM


In this study, at first, we measured annual variations of the indoor thermal loads in
two mass merchandising stores dealing in clothing based on the results of the partial thermal
load performance tests of air-conditioners and field measurements of outdoor air
temperatures. Then, on the basis of these indoor thermal loads and COP characteristics of
the multi-type air-conditioners for buildings under the partial thermal load operation, we
devised an energy-saving method of air-conditioning in those mass merchandising stores. It
was found that, by optimizing the number of operating air-conditioners according to the
outdoor air temperature and resulting indoor thermal load, the energy consumption in the
cooling and heating seasons can be reduced by 12 % and 30 %, respectively. As a result,
the annual energy consumption can be decreased by 15 %.