Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle -- Part 1: R-123
Local experimental heat transfer coefficients have been obtained for boiling refrigerant flowing up and across a tube bundle segment representing a full flooded evaporator tube bundle. R-123 data with a structured enhanced boiling tube are available.The refrigerant enters at 15% vapor quality and exits at nearly 100% vapor in order to simulate an actual flooded evaporator bundle. Both heat flux, 2,607 to 10,427 Btu/h{center_dot}ft{sup 2} (8,224 to 32,893 W/m{sup 2}), and oil content, 0--15% (by weight), are varied; the mass flux is not varied independently but set by the heat flux. Local tube and bulk fluid temperatures are measured directly, by thermocouples, to calculate the refrigerant-side heat transfer coefficients. The bundle segment saturation temperature set point (taken at the top of the tube bundle) is 40 F (4.4 C).
- Research Organization:
- Northern Illinois Univ., DeKalb, IL (US)
- OSTI ID:
- 20104834
- Resource Relation:
- Conference: ASHRAE Winter Meeting, Dallas, TX (US), 02/05/2000--02/09/2000; Other Information: PBD: 2000; Related Information: In: ASHRAE Transactions 2000; Volume 106, Part 1, 929 pages.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle -- Part 2: R-134a
Nucleate boiling characteristics of R-113 in a small tube bundle