1. Can a solar water heating system be used in place of a traditional gas or electric heating system?

In order to ensure proper efficiency of your water heating system, a solar energy system must be used in conjunction with a traditional gas or electric heating system, rather than as an alternative to a traditional system.

2. Do solar systems produce hot water in the winter?

Erjin solar systems will operate and produce hot water during the winter months but may require anti-freeze protection where applicable.

3. Do solar systems produce hot water on a cloudy/overcast day?

Erjin solar systems will be able to provide heating during cloudy or overcast days, but may require the use of traditional gas or electric heating system to produce required temperatures.

4. Can I use a solar collector with my existing hot water system?Most often times solar collectors can be used with an existing system by utilizing a simplistic solar conversion valve that connects to your existing water tank.

5. What happens if one of the solar tubes is broken?The tubes are very strong and not easily broken, but can be replaced very easily. They are inexpensive and available.

6. What is the payback/ROI of the system?

Depending on factors including geographic location of the system, insolation levels (amount of solar radiation) in that area and annual usage of the system, an average household of 4 persons can expect to recover the cost of a solar system within 4 to 6 years.

7. What is the life of the solar collector systems?

Erjin solar systems have a life expectancy of greater than 20 years with a manufacturer's warranty of 3-5 years.

8. Do Erjin solar heating systems require any maintenance?

Maintenance of the system is negligible; however, an annual assessment of the solar system is recommended to help to maintain efficiency levels and to help avoid potential long term problems.

9. Can evacuated tube solar collector be used for swimming pools?

Due to the enormous amount of energy required to heat a swimming pool, normally the answer is no, as there is not enough space to put a number of collectors required to contribute significantly to the pool heating. That is to say, if you have the space and money to devote to a solar thermal heating system for your pool, there is no reason why it cannot be done.

Thus, we designed a patented project collector to realize this. The collector is about 2 m2 in size and can provide 200 liters hot water daily.

10. How to calculate hot water usage?

When choosing a solar system for hot water, we must first determine our need for hot water, in quantity as well as in preferred temperature. The typical temperature used for calculation is 45°C, but the required quantity must be calculated according to specific daily needs.

Hot water usage calculation

1) ResidencesIn family residences, the needs for hot water remain stable during the whole year. An indication for the needs is given by the number of individuals living in the building (or apartment). Usually, the per capita daily consumption of hot water at 45°C is calculated taking into consideration of the following:Low consumption: 35 liters per capita / dayMedium consumption: 60 liters per capita / dayHigh consumption: 80 liters per capita / dayIn the case where we want to connect the solar installation to the washing machine and the dishwasher, we would have to increase the calculated daily needs of consumption as follows:Washing Machine: 20 liters / day (1 wash per day)Dishwasher: 20 liters / day (1 wash per day)Example:A family of 4 needs around 240 liters of hot water daily in order to have a medium daily consumption. (60 liters per capita x 4 persons) If we include a washing machine and a dishwasher, then we must calculate a consumption of 280 liters per day.

2) Hotels - HostelsIn buildings such as hotels, hostels, etc..., the needs for hot water are related to the number of guests. In this case, the daily consumption is calculated by the average occupancy of the rooms, from the period of May until August. Using this basis, the size of the proposed installation is determined. Here below we indicate the per capita daily need for hot water at 45°C.Hostels with shared bath: 35 liters / person / dayHotels: 40 liters / person / day2 -3Star Hotels: 50 liters / person / day4-5 Star Hotels: 80 liters / person / day

Total specification:

1) Inner tank:stainless steel SUS304-0.5mm, GB standards

2) Vacuum tube:QB-AL-N/AL-47-1500, 58-1800; three target vacuum tube or purple golden vacuum tube 58-1800;

3) Outer tank: painted steel 0.4m, aluminum-zinc coated steel 0.45mm; stainless steel SUS 201/ 304 0.4mm

4) insulation: polyurethane 50mm or 55mm, intelligent and integral foaming

5) Frame: coated galvanized steel 1.5mm, or stainless steel SUS 201 1.2mm

Advantage:

1) The material of the outer tank is Galvanized Steel. The material of the inner tank is SUS304 stainless steel, which can satisfy national demand and beyond this standards.

2) The life of the vacuum tubes is 15 years.

3) Stable and reliable performance, good resistance.

4) Temperature when exposed to sun without water: 250degree, 2.5 hours to boiling point if using single tube.

5) It resists 25mm hail.

6) Heat preservation: 72 hours.

7) optional accessories: assistant tank, electric heater, magnesia rods, intelligent controller.

8) 5 years warranty for main machine.

ll glass evacuated tubes are the key component of solar collectors. The evacuated tube is similar to a conventional Dewar flask and consists of two borosilicate glass tubes, a glass with high chemical and thermal shock resistance. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection.

We use the tubes which use the successfully developed innovative Advanced Solar Selective Coatings in commercial scale, which achieve the highest thermal efficiency and good thermal stability. Solar selective coatings absorb most solar radiation while simultaneously suppressing the thermal emittance loss from coating surfaces. They vary mainly in their optical property and thermal stability.

Excellent results have been obtained by using DC magnetron sputtering technology. A solar absorbance of 0.94 - 0.96 with an emittance of 0.04 - 0.06 at 100 centigrade has been achieved.

THE SOLAR focus on providing simple and effective olutions for families and busines concerned with the effects of climate change and rising energy costs. The Solar is growing to be the leader in solar thermal history, products include solar water heater, solar collector,split solar water heating system, vacuum tube, solar power generation, solar air-conditioning, and solar swimming pool. we supply our good quality products and brings in advanced technology and detecting equipment in purchasing of material standard. we are making great efforts in the field of using new energy in order to leave a well environment to our progeniture.

Next, please allow me to introduce the compact solar water heater non-pressured (we usually called CNP System). CNP is very popular in China, Mid-east, India, and so on. Comparing with SS and CP, CNP has a lower price, but the same high temperature. However, it is not very welcome in cold place, because it is too cold in some country in winter, like Russia, even 30 centigrade under zero. Especially at night, the CNP will be in really hard time, because there is no sun.

The Principle of this solar energy water heater can get from us.

Keywords: solar water heaters, solar collector, solar collector u pipe, solar energy, non pressure solar water heater, pressurized solar water heater, split solar water heater

We can also supply the OEM for you.

We manufacture solar water heater and also we install this projects, we have professional engineer and installation team,

so we can design the project for you.

This project is useful for school, hospital, factory and hotel, it is very famous in China, because it can saving energy and protect

environment, provide a good living environment for future generations