Ouyang Xinping, Bao Linlin, Qiu Xuesong. Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube[J]. Journal of refrigeration, 2015, 36(1).
Ouyang Xinping, Bao Linlin, Qiu Xuesong. Effects of Evaporation Temperature on Nucleate Pool Boiling Heat Transfer Characteristics Outside the Enhanced Tube[J]. Journal of refrigeration, 2015, 36(1). DOI: 10.3969/j.issn.0253-4339.2015.01.097.
Nucleate pool boiling outside the horizontal enhanced tube (Φ25 mm) with the refrigerant R134a was experimentally investigated. The inner heat transfer correlation has been obtained by using Wilson graphic method. Experiments were performed at evaporation temperatures of 5.6
0
-2
-4
-6 and -8 ℃
heat fluxes from 4 to 55 kW/m2. Experimental results show that the pool boiling heat transfer coefficient outside the tube increases with the increase of heat flux and evaporation temperature. A new heat transfer correlation of pool boiling has been put forward. By comparison with test data
the relative deviation of 95% of the correlation value is within ± 20%.