From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 127838 10.52957/2782-1900-2026-7-2-143-149 Научные статьи Scientific articles Научные статьи Determination of the energy and exergy efficiency coefficients of recuperative heat exchangers Determination of the energy and exergy efficiency coefficients of recuperative heat exchangers Леонтьев Валерий Константинович Leontiev Valery Konstantinovich leontievvk@ystu.ru

кандидат технических наук;

candidate of technical sciences;

 Кораблева Ольга Николаевна Korableva Olga Nikolaevna korablevaon@yandex.ru

кандидат химических наук;

candidate of chemical sciences;

 Леонтьев Алексей Валерьевич Leontiev Alexey Valerievich alex-leontyev@mail.ru Ярославский государственный технический университет Yaroslavl State Technical University ФГБУ «Судебно-экспертное учреждение федеральной противопожарной службы «испытательная пожарная лаборатория» по Ярославской области» Россия Forensic Expert Institution of the Federal Fire Service "Fire Testing Laboratory" in the Yaroslavl region Russian Federation 10 07 2026 10 07 2026 7 2 143 149 30 03 2026 29 05 2026 https://chemintech.ru/en/nauka/article/127838/view

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.

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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