June 15, 2019
June 15, 2019
June 19, 2019
Energy Conversion and Conservation
Part of University Name Removed Mechanical Engineering Technology (MET) program is to educate MET students on energy conservation in general and for buildings in specific. In this study, which was part of a project conducted for HVAC & Refrigeration class (course code removed), the team decided to investigate ways to reduce energy or improve the coefficient of performance (COP) and efficiency of refrigeration cycles by looking into energy consumption in the condenser unit of the system. Sometimes overlooked and underappreciated, a power plant condenser can make or break the efficiency and power delivery goals. Understanding how important a role the condenser plays is a good step toward greater energy conservation awareness. The team conducted a parametric study to analytically investigate improvements in the COP of a refrigeration cycle when its condenser is shaded from the solar flux. Energy balance and heat transfer equations for heat exchangers were used to determine the shaded and unshaded condenser temperatures while keeping the split temperature difference constant. The simulation investigated improvement in COP for multiple chiller units having various cooling loads varying from 286-1300 kW. Multiple cases and scenarios were investigated keeping the evaporator temperature fixed while varying the outdoor temperature and vice versa. A base case with 5°C evaporator temperature and 35°C for the ambient air temperature was used. The improvement in the COP for the base case with shaded condenser ranged between 10-15% for various cooling loads. As the ambient air temperature or the evaporator temperature were increased, the improvement in the COP decreased with more reductions seen at the lower cooling load ranges.
Shehadi, M. (2019, June), Simulation for Energy Savings in AC Systems Equipped with Shaded Condensing Units Paper presented at 2019 ASEE Annual Conference & Exposition , Tampa, Florida. 10.18260/1-2--33266
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