Thermoelectric Cooler Lab Report

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Chapter -1: OBJECTIVE the more general When designing a small temperature control system, the best choice for a refrigerator/heater element is often a thermoelectric cooler (TEC). The operation of these devices is based on the Peltier effect, which was discovered in 1834 by Jean Peltier. When an electrical current is passed through the junction of two dissimilar metals (Figure 1), heat is also transferred across the junction. To pump heat, a thermoelectric cooler can require a significant amount of power, with typical drive voltages ranging from 2V to 12V and typical drive currents ranging from a fraction of an ampere to tens of amperes. Because of the amounts of power needed to drive a TEC, power-interface circuitry is necessary.…show more content…
By applying DC power supply to a TEC, heat will be transferred from one side of the conductor to the other. It creates a cold and a hot side. They are widely used in industrial areas, for example, computer CPU, Servers, portable refrigerator, medical instruments, and so on. voltage, it is also desirable in a precision temperature control to take advantage of this heat/cool capability. Thermoelectric coolers operate by the Peltier effect (which also goes by name thermoelectric effect). The device has two sides, and when DC current flows through the device, it brings heat from one side to the other, so that one side gets cooler while the other gets hotter. The "hot" side is attached to a heat sink so that it remains at ambient temperature, while the cool side goes below room temperature. In some applications, multiple coolers can be cascaded together for lower temperature. 2 | Page Chapter-1.1: INTRODUCTION Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of…show more content…
Such an instrument is also called a Peltier device, Peltier heat pump, solid state refrigerator, or thermoelectric cooler (TEC). It can be used either for heating or for cooling, although in practice the main application is cooling. It can also be used as a temperature controller that either heats or cools. This technology is far less commonly applied to refrigeration than vapor-compression refrigeration is. The primary advantages of a Peltier cooler compared to a vapor-compression refrigerator are its lack of moving parts or circulating liquid, very long life, invulnerability to leaks, small size and flexible shape. Many researchers and companies are trying to develop Peltier coolers that are both cheap and efficient. (See Thermoelectric materials.) 3 | Page Chapter -2: MOTIVATION This project employs to control the temperature of a particular area in which it is employed. Despite of its small size it is a very efficient device and maintains a temperature constant up to 0.1 degree Celsius. Microcontroller plays a very important role in maintaining the temperature in this project. The TEC can be employed in many sensitive places very temperature control is very important and any change

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