NUMERICAL SIMULATION FOR SEAWATER AIR PRECOOLER

Abstract

The low-temperature seawater is an important renewable source used for direct and indirect seawater air conditioning. In the northern Arabian Gulf, the water depth is insufficient for direct seawater air conditioning. So, for such circumstances, seawater can be utilized as an auxiliary for precooling the returned air from the conditioned space. In this study, a two-dimensional numerical simulation model of crossflow for a 20-tube bank in a staggered arrangement with a /D as 1.5 and 1.25 T /D and S L , with the pitch ratio S investigated diameter of 25 mm was C, and o from 2 to 5 m/s, the air inlet temperature is 28 d . The air inlet velocity range respectively . considered was C o e of 21 seawater temperatur This paper summarized the numerical study to predict the performance of a heat exchanger an as air precooler by utilizing the seawater as a cold stream. The effect of tube bank arrangement is also investigated. ANSYS 20 was applied for the numerical simulation, and the best results efficiency the that resulting in C o 22.75 air precooling coil is the obtained of the temperature after of the air conditioning system maximum improvement by 37.5 %.