One factor affecting the attractiveness of using nonazeotropic refrigerant mixtures is the magnitude of the heat-transfer coefficient of the mixture in comparison to a single refrigerant. The heat-transfer coefficient should ideally be maintained as high as that of the single refrigernant in order to fully exploit other potential benefits of non-azeotropic mixtures.
Research on condensing coefficients reported in this paper and elsewhere indicate a reduction in the coefficient when using a mixture. The principal reduction occurs in the midrange of the condenser. Photos and observations made on a glass-tube condenser indicate that the flow is stratified in this region. This finding suggests that it may be possible to prevent the reduction in the coefficient by installing turbulence promoters or circuiting the condenser to achieve higher velocities in this region of the condenser.
Units: Dual
Citation: Symposium, ASHRAE Transactions, 1985, vol. 91, pt. 2B, Honolulu, HI
Product Details
- Published:
- 1985
- Number of Pages:
- 14
- File Size:
- 1 file , 2.5 MB
- Product Code(s):
- D-HI-85-27-2
