Types of Solar Water Heaters Solar water heaters can be roughly divided into the following categories:
1. From the heat collection part:
(1) Glass vacuum tube solar water. Heating: can be divided into It is divided into all-glass vacuum tube type, heat pipe vacuum tube type, U-shaped vacuum tube type/vacuum tube heat collection and heat storage drying type integrated sun. The most commonly used is the all-glass vacuum tube type, which has the advantages of safety, energy saving, environmental protection and economy. Especially solar water heaters with auxiliary electric heating function, which use solar energy as the main source and electric energy as the auxiliary energy source, so that the solar water heater can work normally all year round and the efficiency is still relatively high when the ambient temperatureyou is low. Its disadvantages are that it is relatively large in size, the glass tube is fragile, scale is easily accumulated in the tube, and it cannot work under pressure.
(2) Flat plate solar water heater: it can be divided into tube plate type, wing tube type, snake tube type, flat box type, round tube type and of heat pipe. Its advantages: good integrity, long service life, few defects, low safety risks, capable of operating under pressure, safe and reliable, large heat absorption area, easy to combine with buildings, and strong resistance to heat. dry air. Performance is also very stable. . Its disadvantage is that there is no vacuum inside the cover and its thermal insulation performance is poor. Therefore, the heat collection performance is poor when the ambient temperature is low and consumes relatively littleloss of energy when using auxiliary heating. Thermal efficiency is lower when the ambient temperature is low or when the leaving water temperature must be high. If damaged by freezing, the entire heat collector plate must be replaced. It is suitable for southern regions where there is no ice in winter.
(3) Ceramic hollow flat plate solar water heater: Ceramic solar panels are thin-walled hollow flat box solar collectors with ordinary ceramic as the base and black porcelain on the base. vanadium-titanium with three-dimensional mesh as surface layer. Ceramic solar panels are made of porcelain material as a whole, which is waterproof, has high strength and good rigidity, does not corrode, does not age, does not fade, is not toxic, harmless and non-radioactive. the absorption rate does not decreasewill not and has high long-term photothermal conversion efficiency.
Tested by the National Solar Water Heater Quality Supervision and Inspection Center, the sunlight absorption rate of ceramic solar panels is 0.95 and the gain of Daily heat of concrete structure ceramic solar roof is 8.6 MJ, which is much higher than the national standard. Ceramic solar panels have low manufacturing and operating costs, do not attenuate the absorption rate of sunlight, and have the same lifespan as the building. They can be used to share the structural layer, insulating layer and waterproof layer with the original structure. is simple and the thermal insulation effect is better than the original roof. The concrete structure ceramic solar roof, sunny wall and balcony guardrail integrated into the building provide hot water, heating and cooling.air conditioning to the building and providing thermal energy to industry; , agriculture and livestock; and can be used for large-scale solar hot water production and wind power generation in deserts, seawater desalination, brackish water desalination and conversion of deserts to agricultural land .
2. Classification from structure:
(1) Compact solar water heater: the vacuum glass tube is directly inserted into the water tank, and the water in the water tank is heated . by circulating the rise in temperature of the heated water, it is the most classic solar water heater on the market.
(2) Split type water heater: The split type water heater separates the collector and the water tank, which can greatly increase the capacity of the solar water heater, does not use not the waterfall working method, and expands the scope of use.around.
3. Divided bywater tank pressure:
(1) Pressurized solar water heater: The water outlet of the solar water heater is under pressure. Typically it runs on surface water and does not necessarily use a pressurized water tank.
(2) Pressureless Solar Water Heaters: Ordinary solar water heaters are pressureless water heaters. The water tank has a pipe connected to the atmosphere, which takes advantage of the height difference between the roof and the roof. the House. The water creates pressure. Its safety, cost and service life are much greater than the pressure type.
Solar water heater is a device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters intodepending on their structural forms. Evacuated tube solar water heaters are mainly used, accounting for 95% of the domestic market share. Household evacuated tube solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into thermal energy mainly relies on vacuum heat collecting tubes which use the principle of hot water floating. and cold water flows to cause microcirculation in the water.
What are the types of solar water heaters?
Pressurized solar water heaters are common in our lives, so what about such a heater pressurized solar water, I believe everyone? Who has never used it knows that I have a question like this, and I will answer it below. By the way, what are the advantages and disadvantages of solar water heaters under presif we ? common in our lives, so such pressure solar water heaters are common in our lives. How about a solar pressure water heater? I think everyone who has never used one has asked me this question, I will answer it for you below? . By the way, I will also give you an answer. What are the advantages and disadvantages of a solar pressure water heater?
1. How about a solar pressure water heater? pressurized solar water heater?
When choosing a solar water heater, you should choose a pressurized water heater. Because the pressurized water outlet is stable, it will not become hot or cold. 2. Secondly, it is recommended to choose a hot plate water heater according to the pressure type. Since the heat collector plate water heater is split type, the pressure water tank can be placed inside. HeThere is no need to install it on the roof as a whole like a vacuum tube water heater, which not only solves the problem of roof pressure, but also ensures the problem of insulation of the water tank. water.
The pressurized water tank of the selected solar water heater must have an enamel coating. The enamel inner tank has good anti-corrosion effect, strong pressure resistance and long service life. As long as it meets the three points above, it is essentially a thermally efficient solar water heater. Of course, based on this, try to use imported heat collecting plates and anti-freeze media. Although its price is a little higher, it has thermal efficiency and a long lifespan.
2. What are the advantages and disadvantages of pressurized solar water heaters?
(1) Advantages of pressurized solar water heaters p>
The superconducting heat pipe of the pressurized solar water heater transfers heat in one direction. Due to its low thermal capacity, its starting temperature is relatively low, so the temperature rises quickly. In addition, the superconducting heat pipe has strong low temperature resistance. although it will not be frozen in a very low temperature environment.
The inner tank of the pressure water tank uses high-frequency welding, which can be directly connected to the tap water system and can work automatically.
Water will not leak inside the vacuum tube of the pressurized solar water heater, which greatly improves the thermal efficiency of the product, and the vacuum tube will not be frozen or cracked in cold weather.
Even if only one pipe of a pressurized solar water heater is broken, the water heater can still operate normally.
The solar pressure water heater is fully automatic pressure operation, which is convenient.
(2) Disadvantages of solar pressure water heaters
Since the pressure water heater has a relatively large area when installed, it has a certain cooling effect. thermal insulation on the floor.
Since the hot water pipe of the pressure water heater is long, a lot of water is wasted with each use.
A pressurized water heater must be exposed to the sun all day to heat the water, so it cannot guarantee that hot water will be available at all times, and the comfort level at this regard is relatively weak.
Solar pressurized water heater lighting panels should be installed on the roof, but installing them on the roof will affect the overall aesthetics of the building. This will be more evident in high-end residential areas. , and was relaxedwill improve over time. May damage roof waterproofing.
Regarding the nature of photoelectric complementarity, in fact, pressurized solar water heaters are not yet fully realized.
What are the advantages and disadvantages of pressurized solar water heaters and what are the advantages and disadvantages of pressurized solar water heaters Have you seen it? As the saying goes, there are pros and cons, so don't you do it? Don't be too careful when buying. Pressure is fine as long as you like it.
How much pressure can solar water heaters withstand
Classification from structure:
1) Compact solar water heater : The vacuum glass tube is directly It is inserted into the water tank and uses the circulation of heated water to increase the temperature of the water in the water tank. This is the most conv solar water heatermarket.
2) Split type water heater: Split type water heater separates the collector and water tank, which can greatly increase the capacity of solar water heater, does not use the waterfall working method, and expands the scope of use.
Depending on the pressure of the water tank:
1) Solar water heater under pressure: The water outlet of the solar water heater is under pressure. Typically it runs on surface water and does not necessarily use a pressurized water tank.
2) Pressureless Solar Water Heater: Ordinary solar water heaters are pressureless water heaters. The water tank has a pipe connected to the atmosphere, which takes advantage of the height difference between the roof and the roof. house.Pressure is created when using water. Its safety, cost and service life are much greater than the pressure type.
This article can bewithstand the pressure of tap water pipes about 0.1-0.3 kg/c㎡.
Generally speaking, the pressure of tap water pipes is about 0.1-0.3 kg/c㎡, while the design and carrying capacity of The output of the solar water heater is generally between 0.2 and 0.5. kg/c㎡ enters. Therefore, the pressure that a solar water heater can withstand is generally between 0.1 and 0.5 kilograms per square meter.