Friends who visited rural areas may have discovered a very common phenomenon, that is, almost every household has a rooftop solar water heater, but it is very rare in town, and it's even common. to see him. Less than. For what ? Is it because solar water heaters are not easy to use? Of course, this is not the case. If it wasn't easy to use, this product would probably have been off the market a long time ago.
In fact, solar energy can directly use the sun's energy to heat the water in the water tank, and 95% of solar water heaters at home are solar water heaters vacuum tube domestics, which mainly use heat. collection tubes, water storage tanks and supports. It is composed of related parts and components. The conversion of solar energy into thermal energy mainly relies on evacuated collector tubes. water to reachhot water required. In this way, it is not only environmentally friendly and healthy, but also saves a lot of electricity bills at home.
Although city dwellers rarely use it, the reason why it is very popular in rural areas is also very simple: First, most cities are high-rise buildings and water heaters Evacuated tube solar panels are usually placed on the roof. , one household at a time. Installation, this type of operation mode is difficult to achieve in the city, and residential property also allows private installation of large objects on the roof, unless there is an independent outdoor balcony on the top floor. It's different in rural areas. Generally speaking, people in rural areas build houses on their own property. The place is relatively large and bright, and it is only a small building ofthree floors at most, so it is very convenient to install. solar water heaters, as shown in the picture below.
The second is that if you use a solar water heater, the hot water will definitely be sufficient in summer. Even if it's cloudy or rainy, you don't have to worry about running out of hot water. water at home. But in winter, if there is not enough sunlight, hot water will not be enough. But it is still possible to wash your face and brush your teeth, but it is very difficult to take a shower. But it's different in rural areas. Once winter arrives, many people do not have heating or air conditioning at home, so they do not take a bath at home, but go to a public bathhouse. Additionally, public baths in rural areas are very busy. cheap. If you have a swim ticket, basically two. You can wash it once for only 1 yuan, whereas in the city it iscosts less than ten yuan and more than 30 or 50 yuan. This is therefore one of the reasons why city dwellers hesitate to use solar water heaters.
So what can we use if we don't use solar water heaters during urban decoration? There are generally two types. One is an electric water heater, which is usually converted by electric heating and then stored in hot water before it can be used. water heater, it is generally suitable for homeowners with a small number of people at home.
The other is a gas water heater. The gas water heater mainly uses natural gas energy conversion to heat hot water and can be heated at any time. It is an instantaneous water heater and it is very practical. use. In recent years, it has also become very popular among homeowners. But before installing a gas water heater, it is best to first determine whether the supplyGas supply is available in the community. Some communities do not provide it. When installing, be sure to install the gas water heater in a ventilated area and not in the room. bathroom.
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Is it convenient to take a bath at Shandong University of Technology and Commerce? Wouldn't it be embarrassing if everyone in the big bathhouse took a bath together? I heard everyone goes in naked. This is to ask me.
First of all, it is very profitable to provide hot water to the bath industry, and then I will see how much water You have. to be delivered every day.
The current price of hot water at around 75 degrees in the market is 22 yuyears per ton. If you use waste heat steam from thermal power plants to produce hot water, the cost is about 12 yuan. yuan per ton, which is a relatively good method.
It is impossible to use coal boilers to heat hot water. The government will never allow it. Don't even think about using gas boilers, oil boilers and electric boilers. the costs are staggering!
Unless you build a solar hot water plant to produce hot water, the cost per ton is very low, about 4 yuan.
If you have the capacity, build a 200 ton factory. hot water installation per day. The investment in a solar water plant is about 1.5 million.
According to the current water price, the cost can be recovered in two years. This system can be used for 15 years. and the remaining 13 years will be net profit.
There isa net profit of at least 900,000 yuan every year, accounting for an income of more than 10 million yuan in 2013.
Shandong Technology and Business College has two public baths. Old public baths are rarely used in the business district. In 2012, a new solar bath was built next to the three restaurants. The new one is very modern and easy to use, so everyone goes there now. There are storage cabinets after entering. Everyone undresses and puts away their clothes before entering the bathhouse. There were a lot of people and no one was paying attention to you. The newly arrived freshman was a little shy and walked in in his underwear, which made everyone look at him more visibly Haha.
Besides, there. is a boys' dormitory on West Campus, with room for 6 people. Each dormitory has its own bathroom.
Moreover, there isThere are many public baths and swimming centers around the school