Air heat exchangers with long heat pipes: Experiments and predictions

Autor:	Mhm Mart Grooten, Fla Frank Ganzevles, H Hagens, van der Cwm Cees Geld
Rok vydání:	2007
Předmět:	Heat pipe Materials science NTU method Heat spreader Plate heat exchanger Micro heat exchanger Energy Engineering and Power Technology Thermodynamics Plate fin heat exchanger Mechanics Heat transfer coefficient Condenser (heat transfer) Industrial and Manufacturing Engineering
Zdroj:	Applied Thermal Engineering, 27(14-15), 2426-2434. Elsevier
ISSN:	1359-4311
DOI:	10.1016/j.applthermaleng.2007.03.004
Popis:	This paper presents measurements and predictions of a heat pipe-equipped heat exchanger with two filling ratios of R134a, 19% and 59%. The length of the heat pipe, or rather thermosyphon, is long (1.5 m) as compared to its diameter (16 mm). The airflow rate varied from 0.4 to 2.0 kg/s. The temperatures at the evaporator side of the heat pipe varied from 40 to 70 °C and at the condenser part from 20 to 50 °C. The measured performance of the heat pipe has been compared with predictions of two pool boiling models and two filmwise condensation models. A good agreement is found. This study demonstrates that a heat pipe equipped heat exchanger is a good alternative for air–air exchangers in process conditions when air–water cooling is impossible, typically in warmer countries.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c781d8fde04a8bba1a25a4182e930aa5 https://doi.org/10.1016/j.applthermaleng.2007.03.004 Zobrazit plný text záznamu Full Text from ScienceDirect