Why is the flat plate solar collector more expensive than the vacuum tube?I would like to know what is the cost of flat plate solar collector than vacuum tube?I have the need to increase the pool of solar energy, do not know what kind of cost-effective
Three. Characteristics of flat solar energy:1 flat plate solar in 70s has been invented and applied, since 80s the invention of the vacuum tube solar, solar flat plate in the industry as a whole is slowly out of the market (in Guangdong, Yunnan, Hainan province is still in the promotion and use of solar water heaters), also experienced sunning type solar, flat type solar vacuum tube. Solar energy, the development of vacuum heat pipe type solar energy.
Advantages and disadvantages of air tube solar collector and flat plate solar collectorFlat solar characteristics:Plate solar heat collector:Copper aluminum composite anode plate core collector; all red copper selective coating plate core collector; total copper nitrogen titanium oxide coated core collector threeTwo. Manufacturing method of flat plate solar collector:The heat collector plate core and its manufacturing method of flat plate solar collector, the plate core consists of two pieces of metal sheets stacked together around the seaming process together, made of flat type metal absorber, and insulation galvanized plate at the bottom, the upper glass plate covered with rubber seal groove by light panel around. The groove on the bottom and the back pressing together, form a working path horizontally and vertically connected with each other.
2 flat plate solar working principle is the principle of the glass greenhouse heating of hot water. From the way of making it can know the low efficiency of flat plate solar, solar energy enterprises in some high efficiency such as its high absorption rate: alpha s = 92%, the low emissivity epsilon: H = 10% days the average thermal efficiency of D over 55%. is a kind of irresponsible. As a collector it will also be in the endothermic heat, and heat transfer are only three ways: radiation, conduction and convection. Three kinds of heat transfer of flat plate solar are very obvious, with the emissivity set the water temperature in the heat increases. In fact, the flat plate solar collector thermal efficiency of less than 54%.
