Abstract
An arrangement for heating with solar energy by means of a heat exchanger and storage coupled to the two water heaters has been described earlier. In the present paper, the amount of heat transferred under free or natural convection conditions from water to air in the shell-and-tube heat exchanger and the temperature of out-going air have been estimated by considering various parameters, viz. flow rate and temperature of incoming air, temperature of incoming and outgoing water, length and diameter of tubes, etc. The data presented will greatly help in arriving at the final design of the shell-and-tube heat exchanger to be used for space heating of a living room.
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