Numerical simulation for seawater air precooler

Abstract EN

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 diameter of 25 mm was investigated, with the pitch ratio Sl / D and St / D as 1.5 and 1.25 respectively.

the air inlet velocity ranged from 2 to 5 m / s, the air inlet temperature is 28oc, and the seawater temperature of 21oc was considered.

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 obtained of the temperature after the air precooling coil is 22.75oc that resulting in the efficiency of the air conditioning system maximum improvement by 37.5%.