Performance Optimization of The Evaporative Condenser Design

Abstract

With the increasing demand of air conditioning system worldwide power consumption has been also increase. Evaporative cooling has been used successfully throughout history to provide cooling and is especially effective in hot-dry climates. The use of evaporative processes to improve cooling efficiency is an important vehicle for reducing energy use and peak demand in hot-dry climates. Direct space cooling through evaporative cooling does not provide the same quality of comfort as compressor-based processes in that for most technologies moisture is added rather than removed from the air. While this may be acceptable in dry climates it is not in humid climates where air conditioning is relied upon not only on sensible cooling but on dehumidification also. Evaporative condensers utilize the high efficiency of evaporative cooling at the condensing unit, while also providing de-humidification identical to a conventional air conditioning system. Evaporative condenser may play key role in reducing power consumption in present air conditioning system. This report is organized into five chapters. In chapter 1 principle of evaporative condenser and it's advantages & disadvantages have been discussed. In chapter 2 heat and mass transfer process in evaporative condenser & available design procedure for evaporative condenser in various literatures have been studied. Theoretical and experimental works carried out on evaporative condenser have been also reviewed in chapter 2. In chapter 3 design of evaporative condenser for ammonia refrigeration system for summer design condition has been given. In chapter 4 Performance optimization of evaporative condenser reducing condensing pressure and using VFD for fan & pump have been given. At last in chapter 5 conclusions & future scope of work have been given.