Tips to buy solar water heaters

Solar water heaters is no stranger to us, environmental protection, as long as the sun can supply a steady stream of hot water, but do not spend a penny. Logically speaking penetration of solar water heaters should be quite high, but the fact is the opposite, which is why? Previous solar water heater collector plate must be installed on the roof and the tank, and therefore only suitable for use from the building and villas, real estate can not provide such a location.

As technology improved, and now solar water heater collector panels can be mounted on the outside terrace housing, and the tank can be mounted on the interior, which can not be installed to solve the housing problem. That being the case, you are not full of interest for solar water heaters do? Following Xiaobian gave you to buy solar water heater maintenance skills, interested friends may wish to look.

Part1: first understand before purchasing solar water heater

Solar water heaters solar energy into heat, the water is heated to high temperatures from cryogenic to meet the demand for hot water. Solar water heaters can be divided according to the structure in the form of two tubes Plate peace, vacuum tube to be installed on the roof, while the flat housing can be mounted on the outside terrace.

Both works the same: a first sun through the heat absorbing tube shine on a black glass layer a second layer of the heat absorbing layer of glass, the heat absorption of sunlight, since vacuum insulation between two layers of glass, the heat the rumor is not only passed the water glass, the water inside the tube is heated. Hot water after heating surfaces along the tube up into the heat storage tank, the relatively low temperature of the water along the barrel face into the glass tube backlight supplement, so continue the cycle, so that heat water continuously heated storage bins, so as to achieve the purpose of water.

The advantages of solar water heaters: green energy, with hot sunny time without spending a penny; temperature stability; long life, leak, leak, etc. does not happen, the security;

The disadvantage of solar water heaters: more expensive; higher installation requirements; summer a long time, high temperature storage tank, easily lead piping aging; winter or cloudy need to use auxiliary electric heating;

Solar water heater for the crowd: Although the initial investment in large solar water heaters, but the use of very low cost, especially the long hours of sunshine, large areas of strength, with hot water without spending a penny. Since there is no use of gas and electricity, it will not happen, or leakage of gas poisoning, etc., the use of safety. Products are not only suitable for rural self-help housing and villas, and even real estate can also be installed.

Part2: master the skills to buy solar water heaters

First, choose the brand and service

To select a manufacturer specializing in the production of solar water heater products , best quality brands , so as to have a good product quality and excellent after-sales service system and commitment.

Second, look at the quality of the vacuum tube

Is a key component of the vacuum tube water heater , vacuum tube under the same external conditions get much heat directly affects the water level . To carefully observe the coating on the inner glass tube when choosing its color is generally black , dark blue or dark gray , uniform coating of good quality color film no scratches, no peeling or shedding phenomenon, the glass no stones, placed upright support , not loose.

Third, look at the insulation layer and the liner material selection, process technology

Between the solar water heater tank shell and liner with a layer of insulation materials, insulation for hot water plays a very crucial role in the use of polyurethane insulation materials made life of up to 15 years.

Where the hot water storage tank , preferably a stainless steel plate , the thickness of about 0.5 mm . In short , consumers should choose imported polyurethane , water tank insulation layer thicker .

Fourth, look at the thermal performance indicators

The higher the temperature of the water tank is not , it shows better thermal performance , but to the average daily efficiency as high as possible , with an average heat loss coefficient as low as possible . Followed by a pressure test to see whether the qualified water heater , pressure test not up to standard water heater leak easily lead to a waste of water and can not be used.

Fifth, look stent design

Bracket support collector and tank insulation shelf. Requires solid structure, high stability , anti snow , anti-aging , does not rust. Material is generally stainless steel, aluminum or steel spray.

Sixth, select tank capacity

The lowest average family bathing water : Male 30L, female 40L, if the family includes a kitchen , including water , you can estimate the per capita water consumption 40L total water ; household solar water heaters in winter temperature is generally calculated by 50-60 degrees , converted water heater water capacity , also according to the water heater case to decide the actual purchase .

Part3: the use of solar water heaters Precautions

First, the tank dry air can not pay immediately after sun

Even in winter, dry air sun can never pay immediately the tank , because the vacuum in the air drying, the tube temperature can reach 2500C, so dry in the tank or first Sheung Shui before sunrise or the sun must after half an hour downhill , to prevent bombing .

Second, the use of electric auxiliary heating care to prevent dry

Equipped with an auxiliary heat source should be checked regularly and auxiliary heat exchanger device is working properly or not. For the auxiliary heat source is electric heating tube , and before use, make sure reliable leakage protection device , or can not use . Special attention should be used with auxiliary heating , Sheung Shui , water tank should be made not less than 50 % in order to prevent dry heating . In the bath, paying particular attention to unplug , live use is strictly prohibited .

Third, the proper use of power with tropical

When installing heating cables must pay attention to choose the quality of clearance products , to ensure the normal use and reduce risks. Note the use of tracer promptly closed after thaw , try not to use the voltage instability.

Fourth, make sure that the water heater can withstand winds invasion

In winter winds, solar water heaters are installed outdoors , so you want to install the water heater and roof stability to resist the invasion of the gale . In case of windy weather on the solar water heater can be filled with water to increase the water heater wind , load-bearing capacity , and disconnect the electric heating, instrumentation power .