Description

This paper presents an evaporator model that accounts for the phenomenon of changing overall heat transfer coefficient and couples the two-phase pressure drop with its associated change in refrigerant saturation temperature to heat transfer. The model is used to suggest optimum overfeed ratios for various refrigerants and conditions. Differences in design criteria between ammonia and R22 are discussed. Effects of parallel flow vs. counterflow circuiting on performance and implied frosting characteristics are examined.

KEYWORDS: designing, evaporators, heat flow, pressure drop, refrigerants, ammonia, R22, performance, refrigeration.

Citation: Symposium Papers, Atlanta, GA, 1990

Product Details

Published:

1990

Number of Pages:

7

File Size:

1 file , 850 KB

Product Code(s):

D-18530