Effects of the cooling section on the heat transfer performance of wall solar-water heating

Abstract

This research combines thermosyphon loops with building walls and collects solar heat from building walls to heating working fluid in the thermosyphon loops The heated working fluid can be used for other purposes to increase energy usage The study explore the effects of the cooling section on the heat transfer performance of wall solar-water heating by experiments The experimental results show that in the mixed convection mode the flow rate of the working fluid in the thermosyphon loops will be greatly improved and the heat transfer efficiency will also be effectively increased Because of the model design the big potential difference of the 30 cm cooling system caused a faster flow rate of the working fluid in the hermosyphon loops and improved the heat transfer effect Also in 20 °C cooling water the system will have better heat transfer effect However in the low wattage low-temperature cooling water and mixed convection mode the working fluid becames turbulence and supplied less heat which led to the phenomenon that the flow rate of the working fluid is easily amplified after the calculation of the data obtained from the experimental points The heat transfer results from strong to weak are : the mixed convection mode with a 30 cm cooling system the natural convection mode with a 30 cm cooling system the mixed convection mode with a 45 cm cooling system and the natural convection mode with a 45 cm cooling system

Date of Award	2019
Original language	English
Supervisor	Chi-ming Lai (Supervisor)