Low Pressure Solar Water Heating
1. OEM offered
2. More appealing
3. High efficiency
4. Most economical
Working Theory of Low Pressure Solar Water Heating:
Since the density of hotter water is much small than colder water, the hotter water is always floats upon colder water.
The coat of vacuum tube absorbs solar irradiation to warm water inside tube, hotter water rises from tubes to storage tank, and the same time colder water in storage tank sinks down to vacuum tubes, this natural convection will last till the water in whole system reaches the highest temperature due to local solar irradiation and duration in a single day.
Advantages:
The most economical solar water heater for domestic hot water;
Simple structure with very easy installation and pipeline connection;
INLIGHT argon-arc welding and in-house testing ensures a long lasting tank without any leakage problem;
INLIGHT makes a high-density integral PU insulation layer for a long time heat preservation 75~80 hours;
INLIGHT solar vacuum tube is made of high borosilicate glass with stable performance and no blasting problem for 15 years;
INLIGHT stainless steel frame for both slope and flat roof installation, with stainless steel fastener to protect device from rusty problem;
INLIGHT non-pressure solar water heater can be equipped with many optional devices to make an automatic-operating system;
We install sample solar water heater for every order before delivery to ensure no mistakes or missing parts for customers.
Disadvantages:
The non-pressure solar water heater must be installed as high as possible to ensure a hydraulic pressure for outlet hot water;
It is not convenient to use non-pressure solar water heater in area with an outdoor temperature below (-)20 degrees.
Optional Device:
Assistant tank, a device installed on top of storage tank, with a float ball valve inside to control water refill for storage tank automatically.
Electrical heater, an electricity based heating device installed in storage tank to assist solar water heating in cloudy or rainy days.
Intelligent controller, a device with sensor and valve for automatic water refill and temperature display, if necessary control electric heater.
Anode magnesium: A device installed in hot storage tank to effectively prevent solar system from generating water scale.
Reflective plate: Choose to install aluminum or stainless steel reflective plate under tubes for higher efficiency in solar water heating.
| Vacuum Tube |
Tube size |
Φ47*1500/1800mm; Φ58*1800/2000mm; Φ70*2100mm |
| Absorber |
Single-target AL-N/AL or three-target SS-AL-N/CU coating |
| Tube Qty |
8 ~ 42 Tubes |
| Water Tank |
Capacity |
70L ~ 400L |
| Inner tank |
Food-grade stainless steel plate SUS304-2B |
| Insulation |
Integral high-density polyurethane foam 50-60mm |
| Tank shell |
Color steel plate |
| Bracket |
Material |
Hot dip galvanized steel plate |
| Tilt angle |
20°- 50° according to local latitude |
| Optional Device |
Electrical heater, Intelligent controller, Assistant tank, Anode magnesium |
| Water Output |
45-95 o C according to local solar irradiation and duration |
| Hail Resistance |
Φ25mm |
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