Abstract:
This paper presents a mathematical modeling for thermal performances prediction of a waste heat
recovery from CO2 system. A arrange tube banks model attaches four side fins, which put
down in the same rang and transfers heat between water and CO2 which flows inside tube
and water flows inside square shell that heat exchanger is designed tube bank with fins which
used material that is copper amount 10 tubes to put down in the same rang two rows and
five backs. A mathematical model was built to predict for the outlet temperature (Tso) of the water
in shell side and outlet temperature (Tto) of the CO2 in tube side heat exchanger which was
simulated using VISUAL BASIC PROGRAM. When increase flow rate of water at 0.005 kg/s,
control flow rate of CO2 at 0.012 kg/s, control water temperature (Tsi) of 29c and CO2
temperature (Tti). It was found that Tso decrease of 21.4c, and Tto decrease of 19.5c. When
increase flow rate of water at 0.035 kg/s. It was found that Tso increase of 27.8c ,and Tto increase
of 23.3c. Therefore, The model was compared with the experimental results, maximum error of
Tso is within 6.43 %, and maximum error of Tto is within 18.3 % . Finally, The modeling based on
used for built shell and tube heat exchangers of waste heat recovery form carbon dioxide in
industries.