Energy cost saving evaluation of VSD installation in compressor rack of refrigeration system for the retail and wholesale building

Abstract

Buildings generate the highest portion of energy consumption in most countries. It includes major contribution in climate change. Therefore, energy conservation in building is important to get higher energy standard of the country. In most regions of the world, heating and cooling loads represent the largest building-sector energy end-use. This research focuses on an evaluation of VSD installation in refrigeration system for the retail and wholesale building. The total building area of the existing experiential site is 10,000 sq.m. with 7,000 sq.m. sale area. The research data is derived from actual energy consumption and actual load measurement. The method is comparison between conventional compressor and VSD compressor in refrigeration system. We finally find that the energy of VSD compressor was not saved for the whole day. The compressor with VSD is more efficient than the one without VSD compressor during day time. The compressor with VSD worked at night or no load, whereas the compressor without VSD stopped at night or no load. If we would like to get energy saving efficiency from VSD installation in compressor rack, VSD system need to set additional function to turn off at night or turn off at no load demand.