Abstract

Engineers are continually being asked to improve processes and increase efficiency.These requests may arise as a result of the need to increase process throughput,increase profitability, or accommodate capital limitations. Processes which use heattransfer equipment must frequently be improved for these reasons. This paperprovides method for increasing performance shell-and-tube exchanger . Themethods consider whether the exchanger is performing correctly to begin with, andenhanced heat transfer. Refrigerator is one of the home appliances utilizing vapour compression cycle in its process. Performance of the system becomes main issue and many researches are still on going to evaluate and improve efficiency of the system. The main objective is to improve performance of the refrigeration system in term of refrigeration Capacity, Compressor work and Coefficient of performance (COP) by determining three importantparameters during in operating mode which are temperature, pressure and refrigerator flow rate. A household refrigerator designed to work with R-12 which is use as an investigation unit to assess the prospect of using refrigerants.Work on condenser in domestic refrigeration is pretty development. We are going to introduce the thermoelectric module in a model of domestic refrigerator for sub cooling the refrigerant and the effect of condenser temperature on COP and refrigerating effect is in investigated. The energy consumption of the refrigerator during experiment with refrigerant R-134a will be measured.

Authors and Affiliations