solar water trough heater

A 50/50 propylene glycol and water mixture from the collectors through a coil of pipe in the solar tank, and then is pumped back through the collectors. The potable water is warmed by heat transfer through contact with the pipe. These systems are pretty much the only choice in very cold climates. When there is not enough energy for sun, an electrical or gas back up element will be automatically switched on by controller.

Flat-plate collectors are the most common solar collectors for use in solar water-heating systems in homes and in solar space heating. A flat-plate collector consists basically of an insulated metal box with a glass or plastic cover (the glazing) and a dark-colored absorber plate. Solar radiation is absorbed by the absorber plate and transferred to a fluid that circulates through the collector in tubes. In an air-based collector the circulating fluid is air, whereas in a liquid-based collector it is usually water.
Flat-plate collectors heat the circulating fluid to a temperature considerably less than that of the boiling point of water and are best suited to applications where the demand temperature is 30-70°C (86-158°F) and/or for applications that require heat during the winter months.
Flat collectors can be mounted in a variety of ways, depending on the type of building, application, and size of collector. Options include mounting on a roof, in the roof itself, or free-standing.

1.Simple Installation, no maintenance, effective operation 
2.Easy retrofitting to existing systems 
3.Suitable for single and multiple solar heating application systems 
4.Preferred option for extremely cold areas and questionable water quality 
5.Incoming potable water is routed to the solar storage tank 
6.Porcelain enamel or SUS316 stainless steel storage tank with electrical or gas back up 
7.Double-walled copper coil heat exchangers in storage tank prevent contamination of household water  

Certificate: SRCC, CE, ISO9001, Solar Keymark