Abstract
The two-phase thermosyphon loop is an efficient solution for space cooling. This paper presents the simulation results of numerical studies on the heat transfer and thermal performance of a two-phase thermosiphon loop for passive air-conditioning of a house. The fluid considered in this study is methanol, which is compatible with copper and is environmentally friendly. These numerical results show that the temperature at the evaporator wall drops from 23°C to 13°C and increases at the condenser. The solar flux density has a strong influence on the condenser temperature. The mass flow rates and masses at the evaporator and condenser increase with temperature. The variation of evaporating and condensing temperature affects the performance of the system. For a constant evaporating and condensing temperature of 2°C and 29°C, the COP is 0.77 and 0.84 respectively. With these results, the use of the two-phase thermosyphon loop in air conditioning is possible to obtain a thermal comfort of the occupants acceptable by the standards but with a large exchange surface of the evaporator.
Highlights
This paper presents the simulation results of numerical studies on the heat transfer and thermal performance of a two-phase thermosiphon loop for passive air-conditioning of a house
The objective of this study is to numerically model a two-phase thermosyphon loop for passive air conditioning in hot and dry tropical countries such as Guinea in the Mamou region using the finite element method
The evaporator was validated from an experimental study by [8], who performed an experiment on the self-regulation performance of a two-phase thermosiphon loop with double parallel evaporators
Summary
In hot and humid countries, the ambient temperature and relative humidity can reach 41 ̊C and 84% respectively In these tropical countries, air conditioning becomes essential to maintain thermal comfort conditions for humans in buildings. Air conditioning equipment can consume up to 50% - 80% of the total electricity consumption of residential, public and commercial buildings in both developed and developing countries [2]. In developing countries such as Guinea, the cost of electricity for the consumer from recently completed hydroelectric dams and conventional fossil fuel power plants continues to rise due to high transmission and distribution losses.
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