The solar water heater is a heating device that converts solar energy into thermal energy and heats water from low temperature to high temperature to meet the hot water needs in the living and production of people. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters based on their structural shapes. Evacuated tube solar water heaters mainly account for 95% of the domestic market share.
The advantages of solar water heaters include:
Energy saving: part of household living expenses is spent on water and electricity, but l he use of solar water heaters can save more than 90% electricity and gas costs. Very economical.
Environmental protection: it reduces the development of other non-renewable energy sources, which has a positive effect.
Safety: when using heatersolar powered water heaters, there is no hidden danger of poisoning or electric shock, and they are safe and reliable.
Economic: the initial investment is relatively large, but it remains relatively economical in the long term.
Disadvantages of solar water heaters include:
Inconvenient installation: The brackets must be installed on the roof, which takes up a lot of space.
Difficult maintenance: The dust on the solar water heater should be cleaned regularly to avoid excessive dust accumulation and affect the use effect.
Not suitable for cold areas: Due to the poor thermal insulation capacity of solar water heaters, they may not be able to meet the hot water demand in cold areas in winter.
When choosing a suitable solar water heater, you should consider the following factors:
Safety: Solar water heaters shouldwind be installed in sunny locations such as roofs or balconies, so safety issues must be considered. Choose a solar water heater of a well-known brand and reliable quality, and carefully check whether it has safety protection measures such as lightning protection and electrical protection.
Heat collection area: The larger the heat collection area, the higher the heating efficiency of the solar water heater. The appropriate heat recovery area should be selected based on household size and water consumption.
Water quality: Solar water heaters should use tap water. Water quality issues must therefore be taken into account. If the local tap water quality is poor, you should choose a solar water heater with filtering function.
Maintenance costs: solar water heaters requiret regular cleaning and maintenance, therefore maintenance costs must be taken into account. Choosing a brand with good after-sales service and a long warranty period can reduce maintenance issues.
Energy costs: Solar water heaters are powered by solar energy, so energy costs must be considered. Appropriate energy bills should be chosen based on household financial circumstances and local electricity prices.
Floor space: Solar water heaters must take up a certain amount of space, so floor space must be considered. You can save space by choosing a solar water heater that is space-saving and easy to install.
Lifespan: The lifespan of a solar water heater depends on the quality of the material and the manufacturing process. You should choose a solar water heater with a long lifespan and low maintenance cost.ance.
Brand Reputation: Choosing a solar water heater brand with high brand awareness and good reputation can guarantee product quality and after-sales service.
In summary, there are many factors to consider when choosing a solar water heater. You should carefully compare the performance and prices of different brands and models, and choose a solar water heater that suits the needs and your family. budget.
Advantages: solar water heaters have no noise, no pollution, no poisoning and other dangers, reliable installation, low carbon and environmental protection itself has high-tech processing technology, good heat transfer performance, and hot water The power is large and suitable for use by multiple people in the family; during the cold winter, the solar water heater has a strong capacityanti-freeze tee and in summer, installing a large area solar energy can also insulate the ground.
Disadvantages: The solar water heater is large in size, inconvenient to install, and has certain restrictions on installation conditions due to its large size and complex objects, maintenance is more tedious and needs to be repaired by professionals; Solar energy has a negative impact on sunlight. It is relatively resource dependent so areas with cloudier and rainier days are not suitable for solar energy.
Detailed information
Theoretically, solar water heaters are a one-time investment and cost nothing to use. It's actually impossible.
The reason is that no matter where you are, the weather is cloudy, rainy and snowy and there is insufficient sunshine in winter every year. In this climate, hot water is mainly heatede with electricity (some products are heated with gas). On average, more than 25-50% of hot water must be heated entirely with electricity each year (this varies by region). , and there are many cloudy days). Actual electricity consumption in the region is even higher.
Statistical data in the Shanghai area in the past three years shows that the annual average rainy day reaches 67%, and 70% of the thermal energy of solar water heaters comes from electricity or gas).
As a result, the actual power consumption of solar water heaters is higher than that of heat pump water heaters. In addition, the “anti-freeze belt for electric heating (only available in northern regions)” installed on the external pipeline of the solar water heater also consumes a lot of electricity. In addition, solar water heaters also have many technical flaws.structural issues that are difficult to resolve.
The solar water heater lighting panel needs to be installed on the roof, which is large and cumbersome, affects the beauty of the building (more obvious in high-end residential areas), and can easily damage the waterproof layer of the roof.
Reference documents:
Baidu Encyclopedia - Solar water heater