Study of matrix-type heat exchangers made of perforated plates

Preliminary Development of a Conceptual Model of Matrix Heat Exchanger

“…Flemming's recommendation is that the spacer be thicker, and Hubbell believes that at a fixed distance, the effect of the porosity of the plate is to reduce the heat transfer coefficient Hubbell et al, 1986). The friction factor, strongly influenced by the thickness of the spacer and sensitive to the ratio of plate diameter to holes, than to porosity as mentioned by Hubbell et al, is determined by Mikulin et al, Fleming and Hubbell et al does not depend on the number Reynolds fact which proves that friction due to the shape of the heat exchange element is dominant over the friction at the surface of the heat exchange element, even at small Reynolds number (Reynolds numbers are almost 200) (Mikulin et al, 1980;Hubbell et al, 1986). In the article presented by Shevyakova et al, it is emphasized that the friction factor does not depend on the thickness of the spacer in randomly arranged plates (Shevyakova et al, 1983).…”

“…In the article presented by Shevyakova et al, it is emphasized that the friction factor does not depend on the thickness of the spacer in randomly arranged plates (Shevyakova et al, 1983). The correlations given by Mikulin et al are independent of the plate thickness and the recommendations concerning the spacer thickness to plate thickness ratio (s/d) is 0.3 for circular holes and 0.5 for straight grooves in displaced holes (Mikulin et al, 1980).…”

“…Considering that the temperature difference between the fluid and the shape of the heat exchange element, remains constant over the entire length of the heat exchange element, (Eckert et al, 1974;Mikulin et al, 1979) determines the efficiency of the heat exchange element thus: for rectangular plates and for circular plates, , (m 2 = hA m /k p ; h -thermal transfer coefficient; k p -the effective thermal conductivity of the plates in the transverse direction). Mikulin attaches importance to the arrangement of holes in the plate and the thickness of the spacer, parameters that positively influence the heat transfer coefficient (Mikulin et al, 1980). Flemming's recommendation is that the spacer be thicker, and Hubbell believes that at a fixed distance, the effect of the porosity of the plate is to reduce the heat transfer coefficient Hubbell et al, 1986).…”