Experimental investigation on the performance of an air-to-air energy recovery for building applications in hot-humid climate

Abstract

The aim of this study was to evaluate the performance of an air-to-air energy recovery system in terms of latent efficiency and recovered energy. Experimental investigations were carried out under controlled conditions in Energy and IEQ Testing Unit located in School of Industrial Technology, Universiti Sains Malaysia. Tests were performed under different airflow rates ranged from 1.0 to 3.0 m/s and intake relative humidity of 70 %, 80 % and 90 %. The latent efficiency and recovered energy of the system were calculated and evaluated by adopting calculation method by ASHRAE Standard. The latent efficiency of this system ranged from 40 to 74 % and the highest value of recovered energy of 1,456 W was achieved at 2.5 m/s and 90 %. Results indicate that the latent efficiency decreased and in contrast the recovered energy increased with increasing airflow rates.

Development and Performance Investigation of Energy Recovery System in Tropical Climate

“…They reported the lowest efficiency of 57.8% at the temperature intake of 31°C at the air velocity 3 m s −1 . 15 Mardiana-Idayu and Riffat noted the highest sensible and latent effectiveness of 66% and 58% at 1 m s −1 and lowest sensible and latent effectiveness of 48% and 26% at 3 m s −1 using a diamond-shaped fixed-plate enthalpy recovery core. 17 Hence, the results show that as air velocity increases, sensible and latent efficiencies diminish accordingly.…”

“…These conditions are similar to the study by Zafirah and Mardiana as well as Mardiana-Idayu and Riffat. 15,17 These conditions were chosen because they are the common monthlyaveraged dry bulb temperatures for several cities in the hot-humid climate zone.…”

“…14 Zafirah and Mardiana studied the performance of an energy recovery system with changing operating parameters. 15 Yau and Ahmadzadehtalatapeh applied a heat pipe heat exchanger (HPHX) to study the effects of the inside-design temperature and the coil-face velocity on energy recovery. 7 Zhang and Zhang found that over 80% of the energy during the operational hours of an air conditioning system can be reduced by applying the HPHX in the air handler.…”

Building Energy Consumption and Carbon dioxide Emissions: Threat to Climate Change

“…Most forms of these renewable energy technologies unlike fossil fuels produce little or no carbon dioxide emissions [41,44]. Furthermore, significant reduction in energy consumption and carbon dioxide emissions from buildings can be attained through a range of measures including, energy efficient technologies, smart design, low carbon appliances and high efficiency HVAC systems that are already well established and extensively used [1,11,45]. Despite the capability to reduce carbon dioxide emissions, the contribution of these technologies relies heavily on the economic competition between these technologies and society aspect and varies substantially by country and region [46].…”

Performance and exergetic investigation of a domestic sp

“…Many investigations have been conducted so far to study the performance of air conditioning systems by using different types of refrigerants [17][18][19][20][21]. Arora et al [5] carried out an investigation of actual vapour compression refrigeration cycle in terms of COP, energy destruction and energy efficiency for R22, R407C and R410A by developing a computational model.…”