Our Critical Heat Flux Apparatus consists of a. m. s. shell, in which copper tubes are fitted. The baffle in the end box make the tube arrangement two-pass type. The cold fluid, i.e. air enters the shell and flows over the tubes. Hot fluid is hot water, which is obtained from a geyser and flows through the tubes. 25% cut baffles are provided in the path of air.

A measuring tank measures water flows rate while an orifice with water manometer measure air flow. Thermometers measure the inlet and outlet temperatures of the fluids. The unit enables students to determine the heat transfer rate, heat transfer co-efficient, LMTD, and effectiveness of heat exchanger, in laminar as well as turbulent flow of air.

Following are the specifications of Critical Heat Flux Apparatus:
1. Shell – 150 mm. I.D., 750 mm long provided with end boxes, cold and hot fluid inlet and outlet connections and 4 nos. equidistant 25% cut baffles along the length (two pass design.)
2. Copper tubes - 1/4” O. D. copper tubes for hot water 32 nos.
3. Centrifugal blower 1/2 HP, to supply air.
4. Water heater to provide hot water – 3 kW capacity.
5. Measuring tank and stop clock for water flow measurement.
6. Orifice with water manometer to measure air flow.
7. Thermometers to measure the inlet and outlet temperatures of fluids.