BOILING AND CONDENSATION HEAT TRANSFER EXPERIMENT SET
In engineering applications, boiling and condensation processes characterized by very high heat fluxes are encountered. For example, in a closed-loop power cycle, pressurized water is first converted into steam in a boiler. Then, it expands in a turbine and is condensed back to liquid form in a condenser before being pumped back to the boiler to continue the cycle. Evaporators and condensers, which are main components of vapor compression refrigeration cycles, are other typical examples where heat transfer occurs during boiling and condensation. Nowadays, boiling is utilized to improve the thermal performance of advanced electronic devices due to its high heat transfer capability. For the rational design of such systems, a good understanding of phase change processes is essential.
With our educational set, the isothermal change also occurs at constant volume. Transparent tanks allow observation of the state change. Air is used as the test gas. In the first tank positioned on the left, the air volume sealed airtight is decreased or increased using a compressor and hydraulic oil. This results in an isothermal state change. The compressor can also operate as a vacuum pump. If changes occur slowly, the state change takes place at nearly constant temperature. In the second tank on the right, the temperature of the test gas is increased with a controlled electric heater, and the resulting pressure increase is measured. The volume of the enclosed gas remains constant. Temperatures, pressures, and volumes are measured electronically, displayed digitally, and transferred to a computer for processing.
