Development of a solar thermal water pump with air-water vapour
The objective of this research was to design and to develop a solar thermal water pump.The pump was powered by hot air-water vapour produced from a flat plate collector coupled with the auxiliary electric heater substituting for an evacuated tube solar collector.The solar water pump system comprised a flat plate solar collector(SC),an overhead tank(OT),a hot water storage tank(ST),an electric heater tank(HT),a liquid piston tank(LT),and a one-way valve for water circulation control.One metre discharge head and 1-3 m suction heads were tested.The LT was filled with the 10%air and 90%water.The pump could operate at the LT temperature of about 98 oC.It was found that,for the suction heads of 1 and 3 m,the total pump efficiency was around 0.0140-0.0301%,and the thermal efficiency was around 32.5-36.3%,respectively.The pump could suck around 7-8 l water from a well in a cycle.The energy inputs were 18 MJ of which 55%was from the auxiliary electric heater and about 45%from solar energy,during 2-h period.The average temperature in storage tank(ST)was around 42.9-46.7 oC sufficiently high for residential use.It was concluded that the suction heads affected the pump efficiency.Increasing air into the system could reduce some energy consumption.Moreover,the pump of 240 l capacity was tested.The energy inputs were only taken from auxiliary electric heater.System operation was controlled by hand.Suction heads of 1,2,3 and 5 m were tested.It was found that the pump could suck water of about 80-90%of pump volume.In addition,temperature,pressure and water pumped per cycle were presented.
Flat plate solar collector Thermal water pump Hot water Heater Hybrid
Panusak Moonsri Janthana Kunchornrat Pichai Namprakai
Division of Energy Technology,School of Energy,Environment and Materials,King Mongkuts University o Division of Energy Management Technology,School of Energy,Environment and Materials,King Mongkuts U
国际会议
桂林
英文
1-27
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）