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Forced air flows over a convection heat exchanger in a room heater, resulting in a convective heat transfer coefficient 1.136 k W/m2 K. The surface temperature of heat exchanger may be considered constant at 65 degree Celsius, and the air is at 20 degree Celsius. Determine the heat exchanger surface area required for 8.8 k W of heating
The calculation of heat transfer coefficients in kettle type reboilers is similar to that of ______________
Kettle reboilers have low heat transfer rate than other types as there is high liquid circulation and hence appropriate for fouling fluids.
Kettle type reboilers have _______ residence time.
Consider the following phenomena (i) Boiling (ii) Free convection in air (iii) Forced convection in air (iv) Conduction in air Identify the correct sequence (heat transfer coefficient)
An electronic dealer allows 37.5% discount on the marked price on an electric kettle and gains 25%. If the cost price of the electric kettle is increased by 10% and the profit percentage is same as before, then what is the new discount percentage allowed?
Jacketed kettle is preferred for kettle type reboiler.
The Residence tie in forced convection evaporators is ________ than natural convection evaporator.
The surface area of natural convection type condensers is _____________ the forced convection ones for same capacity.
A Carnot heat engine receives heat at 750 K and rejects the waste heat to the environment at 300 K. The net work output of the heat engine is used to drive a Carnot refrigerator, whose COP is 6.14. If the heat removal rate from the refrigerated space is 6.6 kW, determine the rate of heat supply to the heat engine?