Thermal Performance Enhancement of Heat Pipe Heat Exchanger in the Air-Conditioning System by Using Nanofluid

Abstract

To reduce the energy consumption in air-conditioning systems without changing the required temperature level in the air-conditioned space, Heat Pipe Heat Exchanger (HPHE) has been experimentally used and tested. The heat pipe has been filled with working fluid by about 50% of the volume of the evaporator which represents the filling ratio. In this research, three mass concentration of nanoparticle from copper oxide (CuO), 1wt%, 3wt% and 5wt% have been used and studied. Additionally, its effect on the HPHE effectiveness and the heat recovery ratio at different inlet air temperatures, 30, 35, 40, 45, 50, and 55 °C, have been determined in the evaporator. The study revealed that the temperature change of the evaporator and condenser has been increased with increasing the mass concentration of CuO and inlet air temperature which passing through HPHE. Furthermore, the results have been illustrated that the increasing of the inlet air temperature and CuO mass concentration leads to an increase in the effectiveness of the heat pipe. The highest level of effectiveness and maximum heat recovery value, at inlet air temperature 55 °C with inlet air velocity 1m/s have been found equal to 0.59346 and 883.284 Watt, respectively.

Review of Recent Applications of Heat Pipe Heat Exchanger Use for Waste Heat Recovery

“…nuclear reactor [3,11], the ceramic industry [4][5][6]12], solar collector [13,14], coal to liquid process [15,16], HVAC systems [17][18][19][20][21][22], heat recovery system [23][24][25][26][27][28][29], gas city gate station [30], steel industry [31,32], dyeing and printing industry [33], the…”

“…nuclear reactor [3,11], the ceramic industry [4][5][6]12], solar collector [13,14], coal to liquid process [15,16], HVAC systems [17][18][19][20][21][22], heat recovery system [23][24][25][26][27][28][29], gas city gate station [30], steel industry [31,32], dyeing and printing industry [33], the solar collector [38][39][40], photovoltaic panel [41], steel industry [42,43] pressure reduction stations [34], heat recovery of coal-fired flue gas [35], aluminum industry [36], combine harvester [37] Flat-plate heat pipe Flat-plate heat pipes typically have thinner cross-sections, making them suitable for heat conduction within limited spaces.…”

Use of Silver Nanoparticles Mixed With Deionized Water in a Rectangular Two-Phase Closed Thermosyphon: A Case Study of the Two-Phase Flow

“…For the utilization of 5wt% CuO mass concentration while employing approximately 701.023 Watts of pure water in a nanofluid air conditioning system employing a heat exchanger. It conserves more energy than utilizing pure water (Abdallah et al (2022)).…”

Energy conservation of HVAC systems in isolation rooms using heat pipe heat exchangers

“…Economic analysis showed a downward trend in electricity consumption costs, with a payback period of approximately three years and a service life of 20 years. Furthermore, Abdallah et al [ 14 ] showed that the use of HPHE with the addition of nanofluid and temperature variations increased the effectiveness of the heat pipe by 0.59346–883.284 W at an inlet air temperature of 55 °C and air velocity of 1 m/s. This research shows that the objective of using an HPHE in HVAC systems has not been in-depth on the prototype of the room.…”