Performance Enhancement by Using Wet Pad in Vapor Compression Cooling System

Abstract

Vapor compression cooling systems are widely used in hot and dry climates where the atmospheric temperature in summer reaches around 48 °C and the relative humidity can be below 20%. These cooling systems normally use environmentally friendly gases that do not harm the ozone layer. These systems work with high gas pressure, which consumes high energy and leads to a low coefficient of performance when compared to cooling systems that do not use an environmentally friendly gas. Theoretical and experimental studies have been conducted to find a suitable solution for the performance improvement of this type of cooling system. A possible solution is to lower the temperature of the air before it enters the condenser of the compression cooling system by passing it through a wet pad. The water evaporates due to the latent heat that is withdrawn from the wet pad. The air temperature is reduced to about 11 °C before it enters the condenser of the compression cooling system. This enhancement increases the cooling capacity of the vapor compression cycle by nearly 20% and increases the coefficient of performance by 15%, in addition to reducing the consumed electricity up to 15%. In conclusion, the proposed method of adding a wet pad can significantly enhance the performance of the vapor compression cooling system.

Experimental Investigation of a Split Air Conditioning Using Condensate as Direct Evaporative Cooling

“…It can be concluded that the application of evaporative cooling using condensate water as a cooling media, provides compressor electrical energy consumption saving about 7% in average. The experimental results from other researchers also concluded that there were 7.3% energy saving in compressor work, an electricity savings of 2.37%-13.53% and reducing electricity comsumption up to 15% [19,21,35]. It can be concluded that the application of evaporative cooling using condensate water as a cooling media, Coefficient of Performance increase with decreasing inlet condenser temperature.…”

“…Martínez et al, [20] has been modified the chiller unit by placing evaporative cooling pads before the condenser to improve performance and reduce the energy consumption of an 8.6 MW air cooled chiller. Zaidan et al, [21] presented the performance enhancement by adding a wet pad in Vapor Compression Cooling System. This enhancement increases the cooling capacity and COP by nearly 20% and 15 %, respectively with reduce electric consumption up to 15%.…”

Cost Benefit Analysis Of Window Air Conditioning System with Evaporative Cooled Condenser

“…The results showed that energy saving can be obtained from 5.18 % to 7.39 % using evaporative cooling condenser. Zaidan et al [11] performed theoretical and experimental Works on vapour compression refrigeration system using direct evaporative cooler near to the condenser. The results show when vapour compression refrigeration system using direct evaporative cooler then the coefficient of performance is increased up to 15 % and power consumed reduced up to 15%.…”

Parametric Assessment of The Thermal Performance of Coal-Fired Power Plant

“…However, exergy analysis has gained importance recently over the first law of analysis due to the failure of the first law of analysis to provide enough results that will aid studying the performance of power plants. Exergy analysis primarily aims at identifying the locations of exergy losses, as well as study power plants in terms of their quality [1,[41][42][43][44][45][46][47][48][49][50][51][52]. Exergy analysis remains a way of locating process or system inefficiencies which first law of analysis cannot do.…”