Pre-Heated Solar Heater
PHP
Pre-Heated Pressurized Solar Water heater is similar to compact non pressure solar water heater, but designed with a coil heat exchange inside of water tank. Because the coil can withstand the pressure of city water, it can be recoganized as pressure solar water heater too. Normally the hot water inside of water tank is only for heat storage. People will use the water inside of coil. It is fresh and pressurized warm water. It can be used for room heating too if you install several pieces of solar water heater in series and then connect it to floor heating pipe.
Corrosion Resistant of Coil
KESUN AISI 316 stainless steel surface with special treatment
Without any corrosion after salt spray test.
Test facility:
Salty spray testing machine
Test condition:
- 240 hours continuous test -Spray pressure 1.5bar
- Room Temp. 35℃±1℃
- Pressure can temp. 47℃±1℃
- Humity 85% up
- Solution PH value 6.5~7.2
- NaCl analytical pure
- Solution concentration 5%
- Spray amount 1.0~2.0 ml/80cm2/H
- Tested quantity 10 pcs
Copper
Electrical corrosion
Electrical corrosion happen is due to the electrochemical reaction between two different metal material. Both
stainless steel inner tank and copper pipe are corrosion resistant material. But it will rusted when you put them together. That is why we change to
use flexible stainless steel coil instead of copper coil.
Other AISI 316 stainless steel
Rust spot happen after 72 hours
Test facility:
Salty spray testing machine
Test condition:
- 72 hours continuous test -Spray pressure 1.5bar
- Room Temp. 35℃±1℃
- Pressure can temp. 47℃±1℃
- Humity 85% up
- Solution PH value 6.5~7.2
- NaCl analytical pure
- Solution concentration 5%
- Spray amount 1.0~2.0 ml/80cm2/H
- Tested quantity 3 pcs
The different fixing way of coil
KESUN flexible pipe is fixed with plastic support.
The stainless steel flexible pipe are fixed on a plastic frame tightly. And then whole group will be put inside of water tank. The coil will be average located inside of water tank well. There is no need welding to fix the coil into tank.
Other company flexible pipe is fixed by welding.
In some other factories, they tie up the coil on a stainless steel bar. And then weld the bar to inner tank. It is big risk to damage the inner tank. And the coil will move inside of tank when the pressure water pass through the coil
The different direction of coil
Kesun coil direction
It is horizontal direction of Kesun coil. The cold water inside of coil is heated from bottom circle to up circle gradually. As you know the hot water are aways on top. So the hot water will come out from top circle finally.
Other company coil direction
Due to the fixing way, they can design the coil circle around the fixing bar only. When it works, the water inside of pipe will bring the heat energy of hot water from top of water tank to down part, it is not a good heat exchange way.
Hot Tags: pre-heated solar heater, China pre-heated solar heater suppliers, manufacturers, factory, 2kw solar plant, solar collector tube, solar panel for home, 300 ltr solar water heater, feeder tank for solar water heater, solar home heating system
Previous
No InformationYou Might Also Like
Send Inquiry