Evacuated tube solar collector
Evacuated tube solar thermal collector
Evacuated tube solar collectors usually consist of a heat pipe inside a vacuum-sealed tube. As the area of one tube is small, to increase the heat collection area a number of tubes are connected to one manifold, Depending on the collector size 10–20 tubes are used.
The heat pipe is a sealed copper pipe, which is attached to a black thin copper fin and forms the collector absorber plate. Each tube is terminated to a metallic vessel which is attached to the sealed pipe and acts as a condenser. The heat pipe contains a small amount of volatile fluid (usually methanol or ethanol) which, as long as there is sunshine, undergoes an evaporating-condensing cycle. The solar heat evaporates the liquid and converts it into a vapor which due to its lower density risers to the heat sink (metallic vessel) where it condenses by transferring its latent heat to the flowing fluid, usually water. The condensed fluid then returns back to the solar collector due to gravity. The cycle is repeated as long as there is sunshine and thus solar heat to evaporate the fluid. Water or water-glycol mixture usually flows through the manifold heated up from the condensation of the vapor. The circulated heated liquid is then directed either through a heat exchanger to supply heat to a process or is stored in a storage tank for later use.
Evacuated tube solar collector installation videos:
ONOSI Evacuated tube solar collector
ONS-HPC01/14(01-2) Solar Collector
Description
Evacuated tube solar collector uses heat pipe to heat. As dry connection, prevent water running in the pipe. Its advantages includes small heat capacity, fast heat transfer, resistant to freezing, heat shock, pressure strength, good thermal insulation, no leakage and easy maintenance, etc. The solar collector was designed as heat pipe collector for dry plugging, thus let the collector has a better performance on sealing pressure. They can be separated installation to assemble a large-scale solar collector module, solving the incapability of withstanding pressure of all-glass vacuum tube.
This product is designed for arctic weather in Europe in recent years, it is fit for Europe, Russia and other cold areas.
Features:
1)No water in the vacuum tube eradicates the problem of blocking by scale, prevent the pipe cracking.
2)Strong capability of withstanding high pressure. The pressure of solar collector is set as 0.7Mpa.
3)Through heat transfer aluminum-wing, the selective coating passes the energy to phase change heat pipe and the inside heat transfer medium passes the energy to working medium in flow channelwithin two phase transitions,
4)The heat pipe which is one-way heat transfer has small heat capacity, low starting temperature and fast speed. Thermal conductivity of refrigerant has good compatibility with commonly used metal materials.
5)Heat pipe has distinguishing thermal conductivities. Its thermal resistance is almost zero, resulted in 7,000 times higher than the silver material. And the heat flux could reach 26000kw / ㎡.
6)High temperature resistance features. As the configurationof heat transfer medium useinorganic elements, even if the pipe wall temperature ≥ 300 ℃, the pipe will not burst.
7)Heat pipe has low temperature resisting feature which enables it work under -50℃
Parameter table:
About Us
ONOSI solar specializes in manufacturing and selling solar thermal systems, water purification systems, etc. The main products are: high-end heat pipe solar collectors, air solar collectors, solar Ionizer, solar micro-kitchens, solar water heaters, etc.
The company fully implements the ISO9001:2018 international quality system authentication, through field inspections by authoritative organizations such as TUV and SPF. Won the certification of SOLAR KEYMARK, SRCC, CE, ROHS,etc.
The company focuses on product development and innovation, and has a number of invention patents and utility patents. ONOSI trademark has been registered in more than 22 countries all over the world.
The company has own rights for import and export, has been exported to Netherlands, Italy, Germany, Austria, Chile, Brazil, Guatemala, South Korea, Japan and so on,more than sixty countries and regions, the export quantities are top among the same enterprises.
