Investigation of the characteristics of heat transfer in the heating zone of heat pipes with metal fiber capillary structures
Abstract
Experimental results from the study of heat transfer in radially configured heat pipes which feature metal fiber capillary structures are discussed. Examinations were made with water, ethanol, methanol, acetone, ammonia, Freon, and nitrogen as heat transfer fluids. The heat pipes were equipped with cylindrical and flat casings, and were fitted with copper, stainless steel, and nickel capillary structures. Quantitative results are presented for the heat transfer coefficients for a smooth heating surface in a large volume, for surfaces sintered with the metal fiber structures with low porosity, and with the same surface with high porosity. The heat flux density increased with decreasing porosity, which formed centers where bubble boiling could occur.
- Publication:
-
High Temperature Science
- Pub Date:
- September 1982
- Bibcode:
- 1982HTemS..20..277S