High pressure Copper Coil Solar water heater

  Copper Coil Solar water heater Features description 

1) Copper coil as twice heat exchanger makes a pressurized and instant solar water heating system, tap water connects directly with copper coil for continuing water supply. 

2) Hot water output is instant continous and not limited by water storage tank 

3) An assistant tank can be quipped for storage tank water refill and makes it a completely automatic running system 

4) Instant water heating ensures more clean and convinient hot water use. 

Vacuum tube: Hail-resisting borosilicate glass with high-tech single-target selective coating ensures an efficient solar collecting, tri-target vacuum tube with its patent interference coating even makes the efficiency improved by 12% and especially with a high temperature resistantce (380oC). 

Inner water tank: Food-grade stainless steel SUS304-2B as inner tank keeps the water clean and drinkable, together with advanced welding technics to ensure a long lifespan ( more than 15 years). 

Water tank shell: Silver fluorocarbon (PVDF) plate as outer shell with its super anti-erosion character could be installed in inland weather. 

Insulation Layer: High-density polyurethane integrated foam-forming with twice slaking treatment, preserves hot water constantly as long as 70~80 hours. 

Supporting Bracket: Strong stainless steel plate with a good weight bearing and wind resistance (140 km/hr), stainless steel ensures a long lifespan to acid rain, easy installation, universal bracket suitable for either flat or slope roof installation. 

Accessories: Stainless bolts & nuts, water-proof silicon rubber, anti-aging dustproof rubber seal, plastic pipe holder and ventilating cap to ensure their lives as long as other parts of the system 

Optional Devices 

Assistant tank, to automatically feed tap water into storage tank to keep it sufficient always 

Electrical heater, as an auxiliary heating element in case of raining or clody days so as to ensure a continous hot water supply 

Intelligent controller, automatically controls water refill and startup of auxiliary heating devices 

Anode Magnesium bar, good at eleminating water scale with consumption of itself gradually. 

Warranty: 3 years international responsibility for integrated system exchange and 15 years for glass vacuum tube compensation due to original quality problems

Working Principle of Copper Coil Pressurized SWH

Because proportion difference exists between hot water and cold water, cold water flows downward and hot water goes upward. In other words, hot water always floats on cold water because of its larger proportion.

In nonpressurized system, cold water in storage tank flows downward into the glass vacuum tubes, and there it is heated with the solar energy absorbed with the coating sputtered on inner tubes, and when cold water in glass tubes becomes hot, it rises upward back to storage tank because of the larger proportion, how much hot water rises upward to the top of storage tank, how much cold water will flow downward into glass vacuum tubes at the same time, hence the circulation presents in the nonpressurized system.

The water circulates constantly between storage tank and glass vacuum tubes as long as the energy is absorbed from the solar radiation, and in this way the cold water in storage tank becomes hotter and hotter. Eventually, all cold water in storage tank will be heated enough for a whole day ready for our daily use.

A pile of copper coil installed in the storage tank will be heated by the hot water surrounded, so when cold water from inlet goes through copper coil, it absorbs the heat very efficiently all the way through copper coil pipe till out from outlet ready for daily use, this is so-called twice heat-exchange, in this way we get instant hot water continuously without the limitation of storage tank.