Energetic-exergetic analysis of an air handling unit to reduce energy consumption by a novel creative idea

International Journal of Numerical Methods for Heat and Fluid Flow - Tập 29 Số 10 - Trang 3959-3975 - 2019
Meysam Yari1, Rasool Kalbasi1, Pouyan Talebizadehsardari2
1Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam and Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Tóm tắt

Purpose This study aims to simulate the flow and heat transfer through an air handling unit to reduce its energy consumption by a novel creative idea of using an air-to-air heat exchanger. Design/methodology/approach To do this, both first and second laws of thermodynamics energy and exergy balance equations were solved numerically by an appropriate developed computer code. Findings Using the air-to-air heat exchanger in dry conditions decreases the cooling coil load by 0.9 per cent, whereas the reduction for humid conditions is 27 per cent. Similarly, using air-to-air heat exchanger leads to an increase in the first law of efficiency in dry and humid conditions by 0.9 per cent and 36.8 per cent, respectively. Originality/value The second law of efficiency increases by 1.55 per cent and 2.77 per cent in dry and humid conditions, respectively. In other words, the effect of using an air-to-air heat exchanger in humid conditions is more than that in dry conditions.

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