Abstract: This article on Shanghai's "days of villas," "Construction / solar hot water systems integration," Overview of the implementation project, described in the process of project implementation experience and feelings, from a technical and market point of view of the solar system And the results achieved outstanding efforts in the direction.
Key words: building integrated solar hot water system antifreeze
With the introduction of modern society 0 continuous development of productive forces and constantly improve the living standards of mankind, have gradually increased the demand for energy, conventional energy resources become scarce and the living environment of the serious problems facing humanity. In the development of new and cleaner energy resources in the course of solar energy as an important renewable energy and become the focus of attention.
So far, the development and utilization of solar energy has experienced several decades of development, gradually became the forefront of green energy technology. Solar energy for its economy, cleanliness and safety features can well meet the human needs of life to enjoy luxury. Because the use of solar energy and construction between the inseparable relationship, and the vigorous development of the domestic real estate industry to the use of solar energy has brought boundless vitality, more and more real estate on the performance of the strong interest.
The following are introduced "Construction / solar water heating systems integration" project in Shanghai, "the villa days" of the implementation.
1 project Overview
"On days villa" by the Shanghai Sheshan Country Club Limited responsible for the development of the project in a long history and beautiful scenery of Shanghai's Songjiang District, with a total investment area of 2.51 × 106m2. Through the Solar Temple and the Beijing Industrial Co., Ltd., in cooperation together with the construction of solar water heating systems integration process, has made "National Development and Reform Commission / United Nations Foundation," the support and "solar water heater industry in China Development Office, "with the help of experts. By the use of solar energy through the implementation of the programme has repeatedly demonstrated and discussed, finalized a flat roof for the collector, indoor as "sub-type of pressure tank" of solar hot water system plan. "Sub-type of pressure tank" with two upper and central heating rods, since the temperature control. 。 24 h ensure that the villa's water supply.
October 2003, the United Nations UNDP project by the experts to carry out the implementation of the inspection, the "days of villa" of solar hot water system for the recognition and appreciation. Today, four sets of model villas solar hot water system has opened more than six months time, running in good condition. Successful experience in the draw, "the Villa days," the first phase of 98 villas are full sets of promoting solar water heating systems.
2 project feelings
"The villa days", "Construction / solar water heating systems integration" project for nearly a year of time, we feel there are mainly the following aspects.
2.1 The success of experience 1) building elevation of the building to reduce the impact of legislation, "the villa days" choose the thickness of the smaller flat-panel collector (8 cm), these collector plates sits flat on the sloping roof, and the roof Watts remain between 1 ~ 2 cm of the installation space. People from far away, like the roof skylight set up a light, clever realization of the solar components and the integration of construction, added a dynamic construction.
2) the indoor environment because "the pressure of solar hot water system," the placement of water tanks from the restrictions, so completely under water tanks free interior space layout, or in the garage, or on the mezzanine floor, and even on Outdoor, the installation freedom, the construction of the functional use of space and do not have an impact, easy to use.
3) the laying of pipelines Separated solar hot and cold water pipes can be placed under the water tanks and indoor plumbing from top to bottom with the other channels go well, to achieve a comprehensive pipeline for the future management and maintenance.
4) use of antifreeze as a medium cycle thermal media to ensure that winter will not be exposed Donglie solar energy pipelines, the use of safe, reliable, clean.
5) water tanks, "the pressure of solar hot water system," water tanks, water pressure is the hot and cold water pipes in water pressure, no additional circulating pump, the principle of simple, easy installation.
devices for the realization of the true sense of the 24 h hot water supply, the "days of villas" in the water tanks of the upper and central allocation since the temperature-controlled electric heating rods, to resolve the Shanghai winter cold, rainy weather or for excessive water consumption Where the problem of inadequate water supply.
2.2 shortfall in domestic and foreign manufacturers of solar energy experts and the guidance of help, this project has made certain achievements, but due to certain factors, we believe that the following aspects to be perfect.
。 1) As early as the construction project was first established, we plan to develop a solar collector plates will be embedded in the roof of the structure of the solar hot water system.。 Because to do so: a collector plate can be turned into building components; two solar collectors plate can be a really balanced skylight indoor lighting. Later, due to China's construction technology and construction skills restrictions (such as processing nodes, roofing and drainage, etc.), have had to be shelved in the collector panels on the roof. To achieve true "integration", the future of solar hot water systems required to meet the functional requirements of living in the structure of the building is necessary and useful components.
2) the production processes of solar energy technology development in China is still at the initial stage, so we concentrate on technology research at the same time, efforts should be made to improve product quality, simultaneous development of manufacturing and construction process. At present, "the villa days" of solar hot water heating system is a long pipe, heat loss and more: the use of hot water each time, the need to Fangdiao collector plates in the pipeline between the tank water, with the use of the water outflow of eloquence Requirements of the hot water, virtually causing water wastage. Therefore, solar hot water pipeline to design, the first section of hot water pipes and insulation, and other parts of the problem is that we focus on one of the issues to be resolved.
With the three proposals the continuous improvement of living standards, people have proposed a "life experience, exquisite experience," the slogan. We must, therefore, the appearance of solar energy products and functional design study of solar energy to achieve maximum coordination with the natural environment and comfort. In building on their use, makes the following recommendations for your consideration.
3.1 technical point of view 1) the extent and use of solar thermal collectors board (of) lighting and illumination of perspective is directly related to the proposed building design in the beginning of the solar system to consider the design. Through solar energy technology and architectural design to the joint efforts of staff, to maximize use of solar energy resources and the greatest degree of architectural design to meet requirements.
2) programme design must take into account collector board (of) the wall or roof with a combination of detail, such as handling, including the rain structure, the connection between the components and so on. And, as far as possible the realization of solar energy components of the module and diversification of the economy and line pipe to design reasonable norms.
3) node in handling the requirements of both components connected solid, easy maintenance entry. Because any omission could affect the use of solar features.
4) In the course of construction of pipelines to be considered on the joint seal, to facilitate the installation and maintenance of components and other factors. Precautions such as embedded in the roof fixed component; non-Shangren sloping roof consider the future replacement of the collector plates revealed Tikou and maintenance access.
3.2 economic point of view 1) full use of solar energy to reduce dependence on supplementary heating resources. Design requirements of the board space solar collectors and water storage tanks reasonable size, the choice of auxiliary heating device reasonable. Large amount of hot water in the circumstances, gas (natural gas) auxiliary heating more advantages and economy.
2) At present, the cost of solar energy products and construction costs, savings in energy costs compared with costs still higher. 。 However, through the use of high-quality materials improve product quality, extend the service life, optimizing the size, and other means of solar energy components, solar energy products will be able to achieve lower unit costs.
3.3 policy point of view 1) the promotion of a technology can not do without the support of the Government, if China can, as some European countries to promote solar energy to vigorously support, the use of solar energy technology development will certainly be achieved spectacular results, solar energy use Will enjoys popular support.
2) Because there is no domestic solar energy technology through a standardized, the solar energy market mixed. So call on the Government to strengthen supervision efforts, reduce waste of resources and potential safety problems, so that people can more confidently choose to use solar energy products.
3.4 development perspective 1) solar energy resources is inexhaustible, use a broad scope. We should vigorously develop solar-thermal energy technology, photoelectric technology and other renewable energy sources (such as ground-source heat pump, etc.) The application of technology to meet the building heating, water, lighting and refrigeration, and other needs, believe that these low-power The value of technology will create more attention.
2) application of solar energy technology should be integrated intelligent control and other high-tech common development, truthfully show inlet temperature of intelligent control (that is, or maintain a constant temperature, or different people to meet the different requirements of the water temperature, to achieve freedom and regulate the operation of the time), Intelligent transfer of energy or energy storage, and other functions.
4 conclusion of solar hot water systems and building the perfect combination, is in practice on the basis of continuous improvement, I believe that with the gradual maturity of solar energy technology and engineering experience in the practice of the continuous accumulation of solar energy technology will play a greater Advantages for the community to make greater contribution.