TITLE: REFRIGERATION SYSTEM OBJECTIVES · To study the refrigeration cycle and measure the coefficient of performance (C.O.P) of refrigerator. · T o plot the vapor-compression cycle in a pressure-enthalpy graph. THEORY In the system of air conditioning the vapor compression refrigeration cycle is commonly used. The fluid which works as medium in the vapor compression refrigeration cycle is in vapor state. During evaporation, it absorbs heat from the cold body and this heat is used as its latent heat for converting it from liquid to vapor whereas in Condensing or cooling, it rejects heat to external bodies, thus creating a cooling effect in the working fluid. The Vapor Compression Refrigeration Cycle involves four components: compressor, condenser, expansion valve/ throttle valve and evaporator. It is a compression process, whose aim is to raise the refrigerant pressure as it flows from evaporator. The high-pressure refrigerant flows through a condenser/hea...
TITLE: TEMPERATURE MEASUREMENT BENCH Objectives: · To learn the fundamental temperature measurement techniques using the thermocouple and resistance temperature detector, RTD (Pt-100). · To compare the accuracy of the various temperature measurement devices. Theory: Temperature is the degree of hotness or coldness of a body or environment (corresponding to its molecular activity). It is measured by means of a thermometer or other instrument having a scale calibrated in units called degrees. A temperature scale is determined by choosing two reference temperatures and dividing the temperature difference between these two points into a certain number of degrees. The two reference temperatures used for most common scales are the melting point of ice and the boiling point of water. The scale we use to measure temperature is "degrees" (°). There are three temperature scales that are used today. i. The Kelvin (K) scale is used by scientists and for...