Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
Yaroslavl, Yaroslavl, Russian Federation
The article examines methods for determining the energy and exergy efficiency coefficients of heat exchange apparatuses. The experimental dependences of the energy and exergy efficiency coefficients on the value of KS/W for a pipe-in-pipe heat exchanger and a shell-and-tube heat exchanger were obtained. According to the authors’ counterflow scheme of coolant movement, the values of both efficiency coefficients are higher than for the parallel-flow scheme. Moreover, at small values of KS/W (less than 0.22–0.24), the values of the energy and exergy efficiency coefficients for the shell-and-tube heat exchanger are higher than those for the pipe-in-pipe heat exchanger. Indeed, at large values of KS/W, the efficiency of the pipe-in-pipe heat exchanger is higher than that of the shell-and-tube heat exchanger.
recuperative heat exchangers, heat, exergy, energy and exergy efficiency coefficients
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