Question

1 PROBLEM STATEMENT AND OBJECTIVE As a mechanical engineer, it is important to maintain a mindset for improving efficiency of devices around us. Using your refrigerator at home as a subject, your job is to explore potential ways to improve the coeficient of performance (COP) of your refrigerator. You may make all necessary assumptions with justification to complete the following tasks listed below 2 TASKS AND DELIVERABLES 1. COP Measurement Define and obtain the mathematical expression for COP Design an experiment to determine the COP of your refrigerator using only a thermometer, a watt meter and a watch 2. Thermal conductivity of insulation The insulation of a refrigerator doors and walls plays an important role of improving efficiency and reducing annual cost of operation. Based on an assumed refrigerator and its physical specifications, conduct an experiment to estimate the average ther mal conductivity of the refrigerator walls. You may explore credible online resources and discuss insulation options of other material. 3. Annual cost of operation Based on the rate of electricity of $0.08/kWh, what is the annual cost of operating your refrigerator and for the remaining life expectancy.

Answer 1