TY - JOUR
T1 - Air heat exchangers with long heat pipes : experiments and predictions
AU - Hagens, H.
AU - Ganzevles, F.L.A.
AU - Geld, van der, C.W.M.
AU - Grooten, M.H.M.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
U2 - 10.1016/j.applthermaleng.2007.03.004
DO - 10.1016/j.applthermaleng.2007.03.004
M3 - Article
SN - 1359-4311
VL - 27
SP - 2426
EP - 2434
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
IS - 14-15
ER -