TY - JOUR
TI - Numerical and experimental investigation of heat transfer of ZnO/Water nanofluid in the concentric tube and plate heat exchangers
AU - Fard Masoud Haghshenas
AU - Talaie Mohammad Reza
AU - Nasr Somaye
JN - Thermal Science
PY - 2011
VL - 15
IS - 1
SP - 183
EP - 194
PT - Article
AB - The plate and concentric tube heat exchangers are tested by using the  water-water and nanofluid-water streams. The ZnO/Water (0.5%v/v) nanofluid  has been used as the hot stream. The heat transfer rate omitted of hot stream  and overall heat transfer coefficients in both heat exchangers are measured  as a function of hot and cold streams mass flow rates. The experimental  results show that the heat transfer rate and heat transfer coefficients of  the nanofluid in both of the heat exchangers is higher than that of the base  liquid (i.e., water) and the efficiency of plate heat exchange is higher than  concentric tube heat exchanger. In the plate heat exchanger the heat transfer  coefficient of nanofluid at mcold = mhot = 10 gr/sec is about 20% higher than  base fluid and under the same conditions in the concentric heat exchanger is  14% higher than base fluid. The heat transfer rate and heat transfer  coefficients increases with increase in mass flow rates of hot and cold  streams. Also the CFD1 code is used to simulate the performance of the  mentioned heat exchangers. The CFD results are compared to the experimental  data and showed good agreement. It is shown that the CFD is a reliable tool  for investigation of heat transfer of nanofluids in the various heat  exchangers.