Abstract
To clarify the relation between the total heat recovery rate H_<tot, N> of a hybrid type of gas-to-gas heat exchanger and the number of layers N in the heat exchanger, a series of experiments without porous metal plates, as a first step, have been conducted. From the measured results, it is clarified that, compared with bare walls, H_<tot, N> with zigzag fin walls increases to about 2 to 3.5 times for N=2 to 7. However, a rate of increase in H_<tot, N> becomes less steep from N=5 to N=7. Further, measurements of pressure drops in the system with and without zigzag fin walls have been performed for the case of N=7 and the behavior is also discussed.
