“< H2 > hospital solar water heating system solution
On the one hand, modern hospitals should reflect modern equipment and have the concept of energy conservation, environmental protection and green fashion. They will consider installing solar hot water projects
Air energy heat pump
The joint supply of hot water system is not bad for the general hospital, so the initial investment is relatively high, which is not a problem for the hospital. The system is stable and safe to meet the daily hot water supply demand of the hospital
Correct installation method of solar energy
Solar energy installation requires many tools, including drilling, fixing, water supply pipe, overflow pipe and other installation. If these are not professional, they are prone to loopholes, affecting the use and service life of solar energy
1. Installed in a sunny position
The solar water heater shall be installed in a place without sunshade, with the main body facing the sun (about 10 degrees due south or West), and fixed firmly to prevent the water heater from falling down in bad strong wind weather
2. Installation body
Assembly sequence of water heater main body: first assemble the support frame, then install the thermal insulation water tank, then install the vacuum heat collection pipe, and finally install the diffuse reflection plate (i.e. anti grating)
3. Install the water tank and vacuum pipe
Align the vacuum tube with the hot ring on the inner wall of the vacuum water tank, and then carefully screw some lubricant back into the hot ring of the vacuum water tank, and then carefully install it on the tail pipe
When installing the thermal insulation water tank, there are five holes on the covers on both sides of the water tank, and the installation method can be flexibly selected according to the actual needs. However, no matter which installation method is adopted, the ventilation pipe must be properly installed, with upper ventilation and lower overflow, so as to avoid expanding or shrinking the water tank due to poor ventilation
What are the solutions that iTunes can’t install
New tracks and playlists are automatically copied to the iPod, and the deleted tracks in the computer music library will also be deleted in the iPod
The problem of installing water heater on the top floor needs decoration at home. The water pressure on the top floor is not enough. How to choose water heater
If the water pressure is low, you only need to install a booster pump at the front of the water heater. Now the domestic booster pump is small and cheap, often about 200 yuan. The booster pump has three states: manual, automatic and off. When taking a shower, select automatic to ensure smooth water flow
How to install solar energy in high-rise buildings
In fact, it is very difficult to install solar hot water system in high-rise buildings such as hotels and high-rise communities. There are three major problems that must be solved in order to ensure adequate supply of hot water. 1. The problem of water pressure. The pressure of hot water on each floor is unstable, which is easy to burst and cause losses at all costs. 2. The hot water supply is insufficient. Because the floors are high and each floor needs hot water supply, it is easy to cause the problem of insufficient hot water supply. 3. For the design of control system, if the local design of control system is unreasonable, it is easy to cause insufficient hot water supply and even paralysis of system operation. Therefore, the design and installation of solar water heating system in high-rise buildings requires the construction party to have high technical strength. At present, the technology of Shuimu solar energy in the solar energy industry is very mature, and they can do it in buildings below 34 floors. With the shortage of energy in China and the promulgation and implementation of the renewable energy law, the application of solar energy as renewable energy in buildings has attracted more and more attention. Many local governments have issued a series of documents to force small high-rise houses to install solar water heaters. At present, some theories that high-rise buildings are not suitable for the installation of solar heat collection projects hinder the popularization of solar energy in cities, builders dare not venture to invest, and many solar energy enterprises are also deterred from facing high-rise buildings. In fact, whether it can be installed or not is ultimately due to the solution of technical and safety problems and whether the “”integrated”” design of solar water heater and building is implemented. For example, rilida solar energy Shanghai Jingwei urban oasis large-scale solar heat collection and water supply system project has scientifically and reasonably solved the problem of solar energy installation on the 14th to 21st floors and ended the dilemma restricting the in-depth development of the integration of solar energy and high-rise buildings
Located in the North Qilian block of Baoshan District, Shanghai Jingwei urban oasis is a large-scale ecological home base invested and constructed by Hong Kong real estate tycoon Jingwei group, covering an area of about 1 square kilometer and a total construction area of 1.5 million square meters. Jingwei urban oasis is an international fashion community integrating planning, transportation, environment, culture, education, business district, medical treatment, sports, intelligence and service. It won the silver medal in the selection of residential area planning and design projects in Shanghai in 2003
In the face of solar energy installation obstacles for high-rise residents, rilida has long been prepared. In terms of installation technology, rilida adopts high-end U-tube split wall mounted solar water heater. The solar collector is separated from the water tank. The collector is installed outside the wall and the water tank is placed indoors. With the unique embedded design, the external unit of air conditioner is installed behind the collector, so as to achieve one dual use, which not only saves space, rows of fashionable and beautiful solar collectors, but also turns into architectural works of art and sun avoidance tools, like shutters, realizing the perfect combination of solar energy and high-rise buildings; In terms of product quality and safety, rilida’s high-end U-tube split wall mounted solar water heater adheres to rilida’s long-standing “”high-energy efficiency standard””. It has many superior properties, such as windproof, antifreeze, high thermal efficiency, balanced water temperature and so on. No matter which floor of the community residents live, they can enjoy hot water with appropriate temperature at home; In terms of combination with buildings, rilida adopts personalized design according to the characteristics of more than 2500 households. The length of customized vacuum tubes alone is 88cm-180cm, with a total of more than 20 specifications. The number of personalized designs of a project is the largest in the solar energy industry. Most importantly, rilida participated in the whole process of house design and truly realized the perfect combination of solar energy and architecture
In the large-scale solar energy heat collection project of Shanghai Jingwei urban oasis, rilida is committed to breaking through the technical problems of the combination of solar energy and high-rise buildings, improving the personalized scheme of solar energy design and installation, improving the added value of the project, and achieving the optimal combination of effect, quality and cost. This has important reference significance for the fine cooperation between solar energy and real estate industry in the future and building modern energy-saving buildings
2、 Several problems to be considered when using solar hot water system in small high-rise residence
1. When selecting different solar hot water system schemes, priority should be given to the reliable operation of the system, convenient management, easy amortization of auxiliary energy costs, hot and cold water costs and operation costs, so as to achieve simple and convenient management, easy acceptance by residents, and no contradiction between property and residents
2. How to solve the problem of using solar hot water for users living in low floors should be considered
3. In the design of solar system, the problem of insufficient solar hot water production in cloudy and rainy weather should be considered. In order to ensure the reliability of hot water supply, the system design shall be equipped with auxiliary heating system to ensure that users supply hot water 24 hours a day or regularly
4. The system shall give priority to using solar energy to heat hot water. When solar energy is insufficient, auxiliary energy shall be used to supplement heating. Realize the purpose of making full use of solar energy and reducing the cost of auxiliary heating energy
5. Solar hot water system shall be reasonable, reliable and advanced; The operation of solar energy and auxiliary heating system shall be fully automatic and pv mounting systems
intelligent; On the premise of ensuring the project quality and effect, reduce the project cost as much as possible and improve the cost performance of the system
6. The layout and placement of solar hot water system shall be coordinated with the surrounding buildings, and the daily use, maintenance and repair shall be convenient
7. The design of solar hot water system shall be carried out simultaneously with the design of building engineering. The reserved pipelines and embedded parts for pv mounting systems the installation of solar hot water system in the early stage shall be in place to facilitate the installation of solar hot water system in the later stage
3、 Solution selection of solar hot water system
In the design and installation of solar hot water system in small high-rise residential buildings, there are mainly the following four solutions to choose from. The advantages and disadvantages of these solutions are analyzed below, and then the best choice is made
Solution (I) install a household solar water heater (household single system) on the roof of each household
Advantages:
1. The solar energy of each household is independent and does not affect each other
2. During operation, there is no charge management problem
3. The system has the lowest investment, stable operation and mature technology
4. Simple and convenient installation
Disadvantages:
1. The solar energy of low-rise households is affected by water pressure, which is inconvenient to use or even impossible to use
2. The solar energy of each household is an independent system. No matter which solar energy has problems, it must be repaired on the roof. Therefore, the frequency of upstairs repair is the highest, which is not convenient for roof management and maintenance
3. It is inconvenient to place and coordinate with the building, which affects the view
4. There are two pipes up and down each household, and the laying space of too many pipes is limited
5. Hot water resources cannot be shared, and there is a problem of “”uneven drought and flood”” in hot water resources
Solution (II) install a set of split solar hot water system, the heat collection unit is installed on the balcony or south wall, and the heat storage tank is placed indoors (household heat collection and household water storage system)
Advantages:
1. Household solar energy is independent and does not affect each other
2. During operation, there is no charge management problem
3. Each household’s water tank can be placed in a convenient place indoors, such as basement, equipment room, toilet, kitchen, balcony, attic and so on
4. The system has high investment, stable operation and mature technology
Disadvantages:
1. The installation of heat collection unit shall be safe and reliable, otherwise there are potential safety hazards
2. The effect of natural circulation is not ideal. The forced circulation of water pump is used, which costs electricity. The water pump has noise and increases the control function
3. The facade of each household shall be considered to be beautiful, otherwise the installation position of each household shall be considered
4. Affected by the inclination angle, the balcony type has low daylighting efficiency and high cost
5. If there is a problem with the heat collecting unit, the maintenance may be inconvenient, so it is necessary to use high-grade products
6. The sharing of hot water resources cannot be realized, and there is a problem of “”uneven drought and flood”” in hot water resources
Schematic diagram of household heat collection and household water storage system
Solution (III) install a solar hot water system with centralized water storage on the roof of the building to supply water to each household through pipelines (centralized heat collection and water storage system)
Advantages:
1. Hot water resource sharing can be realized, which is not limited by the height of the floor
2. It is convenient for flexible layout according to the building conditions and can be coordinated with the building
3. There is only one system with reliable operation and low upstairs maintenance rate. The property can be responsible for the maintenance and management of floor solar energy
4. The system has low investment, stable operation, low operation cost and mature technology
Disadvantages:
1. The consumption of auxiliary energy is affected by cloudy and sunny weather, which is not convenient to calculate the operation cost and expense
2. During operation, hot water needs to be charged; Improper formulation of charging standards is easy to cause contradictions between property and residents
3. A large hot water storage tank needs to be placed on the roof, and the roof load-bearing should be considered in the architectural design
Solution (IV) install a centralized solar heat collection system on the roof, send the heat energy to each household through the pipeline, and heat the heat storage tank installed in each household (i.e. centralized heat collection and household heat storage system)
Advantages:
1. Each household uses the hot water and auxiliary energy in their own water tank without charging
2. It is not limited by the height of the floor, and can realize the sharing of solar thermal energy resources
3. During operation, there is no charge management problem
4. There is only one system with reliable operation and low upstairs maintenance rate. The property can be responsible for the maintenance and management of floor solar energy
5. It can be flexibly arranged according to the floor building conditions, which is the easiest to coordinate with the building
6. The heat collection system is centrally placed on the roof, and the water storage tank of each household is placed in a convenient position in each household
Disadvantages:
1. For convenience, safety and reliability, pressure bearing heat storage tank with electric heating function shall be adopted. Therefore, the cost of water tank is high, resulting in high system cost
2. In order to avoid the phenomenon of heat mixing due to different temperatures of water storage tanks, the electrical control system shall be specially designed
Although the cost of the fourth solution is high, it has outstanding advantages. It does not need to consider the problems of water tank load-bearing, electric auxiliary heating reservation, line reservation, heating water circulation, hot water billing and so on. It is the development direction of unified installation of solar water heaters in small high-rise houses in the future. Therefore, the solar hot water system used in small high-rise residential buildings should be designed according to solution 4. If the real estate developer is limited by investment, the following methods can be adopted. This solution can make real estate developers’ investment in solar energy lower than other schemes
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