23 September 2011

STUDY ON EFFECTIVE OPERATION AND ENERGY-SAVING OF VRF AIR CONDITIONING SYSTEM IN CASE OF OPERATING BY INDOORUNIT ZIGZAG ARRANGEMENT


The authors propose a method for the effective operation of air-conditioning
systems; the method is referred to as Indoor-Unit Zigzag-Arrangement Operation. The
method helps in increasing the cooling load of an indoor unit operating only half unit.
However, aspect of the indoor environment should be uniform. The authors examined the
Indoor-Unit Zigzag-Arrangement Operation in an indoor environment by carrying out
subjective experiments. As a result, it was found that the proposed operation did not impress
the subjects. The authors inspected the energy-saving capability of the operation by
considering data collected at Hokkaido, Japan. The authors used data on cooling and
heating operations and compared the energy consumption for normal operation with that for
high-load operation. The proposed operation was observed to save energy by 31%
compared to normal operation.