Radiant Floor Heating Equipment
quot;Solar heating system" means a new era of energy
With the development of national economy, increasing energy demand, energy use tense, and a large number of conventional energy use will adversely impact on the environment. Solar energy as a renewable, inexhaustible, while not increasing environmental load, will be an important future energy mix components. Abundant solar energy resources in China is one of the countries, the total annual radiation around 3300-8300 MJ / (m2.a), National 2 / 3 area area greater than 2000 hours of sunshine hours, annual terrestrial solar radiation to the equivalent of 2.4 trillion tons of standard coal, with good conditions for solar energy utilization. In building energy consumption, the domestic hot water,
Heating Energy accounts for a considerable proportion of the use of solar energy to meet domestic hot water, heating energy consumption of these low-grade energy efficiency requires a huge, therefore, solar heating technology is gaining attention.
Overview Solar heating system Solar heating system is a solar heating system as a heat source, use of solar collectors to convert solar energy into heat energy, the supply of heating buildings in winter and hot throughout the year other systems. Solar heating can be divided into active and passive in two ways. Passive solar heating through the building and the environment towards the rational layout, interior space and exterior form of smart processing, and building materials and structure, the proper choice, so that the building in winter full collection, storage and distribution of solar radiation heat. Active solar heating system consists of solar collector systems, thermal storage system, at the end
Heating Heating system, automatic control systems and other energy auxiliary heating, heat transfer equipment, a set that, compared to passive solar heating, the heating condition is more stable, but at the same time, investment costs are increased, the system more complex. With the economic and social development, active solar heating began large-scale application.
Solar heating applications in recent years, construction projects, the more focused and representative of a new residential areas around Beijing in the County of solar heating project. As the relative scattered rural residential, low density, not by large investment and maintenance of high levels of central heating mode, while the traditional coal-fired heating method has low efficiency, pollution of the environment, high cost issues, promote safety in rural areas
Environmental protection , Low cost solar heating system meets the objective requirements of the new rural construction. Solar heating is much greater than the required area of solar collector systems require a larger installation location for the high-rise buildings or residential high density urban areas there is the problem of inadequate installation of construction conditions, limits the application of the general construction in rural residential floor area ratio lower, no significant block, construction of solar heating projects with good conditions. Beijing Pinggu District, residential solar heating project progress earlier, there are many successful application experience.
Solar heating system equipment Common collector solar collector has two kinds of flat and vacuum tubes. Which can be divided into all-glass vacuum tube type vacuum tube type, U-tube vacuum tube and heat pipe vacuum tube collector. Currently in China
Solar water heaters Market, flat panel solar water heater accounts for about 10% market share, the rest were evacuated-tube solar water heater, solar water heaters account for the flat abroad for more than 90% market share in the mainstream of China and the world solar energy market, there is a huge difference. As the combination of solar heating systems and building close, so the collector combination of products and construction, failure rate, service life, high performance requirements, flat-plate collector simple structure, compressive strength, resistance to external shocks, for pressure to run, from overall appearance, structural strength, installation and operation and so are very suitable for integration with the building. In thermal performance, despite the flat-plate collector as the insulation properties of vacuum tube collectors, but because of its effective area greater than the vacuum tube collector light, so the thermal efficiency higher than the vacuum tube collector. Early flat-plate collector can not freezing winter’s shortcomings, as technology advances have already been resolved. Solar heating works, the non-heating season energy surplus vacuum tube collector prone tube, the vacuum was reduced and so on, and flat-plate collector is able to more easily solve this problem, therefore, the current solar heating project in Beijing Many projects use a flat-plate collector.
Auxiliary heat source to provide heating for residential solar hot water heating system, and provide hot water for residential solar hot water system in the water characteristics are different, does not require a continuous supply of hot water heating and hot water must be continuous supply and stable and reliable. Solar radiation by day and night, season, latitude and altitude limitations of natural conditions and rainy weather, random factors such as the existence of large intermittent and unstable, so the solar heating system, auxiliary heat source must be set. Auxiliary heat source to solar energy resources in accordance with local conditions, availability of conventional energy sources, building heat load and ambient conditions and other factors, make comprehensive economic analysis to determine the appropriate auxiliary heat source and a reasonable percentage of solar heating, solar heating can select the auxiliary heat source are mainly small-scale fuel (gas)
Boiler Urban heating network or regional boiler house, industrial waste heat, electric boilers, heating pipes, ground source heat pumps and biomass fuels. The construction of solar heating in the rural project, due to urban heating network is not easy to reach and gas pipelines, oil and electricity prices will be higher, therefore, support the application of many types of energy biomass fuel. Such as Beijing Pinggu han Village as, auxiliary heat source with biomass boilers using biomass briquette forming device, the local fruit pruning branches crushed compressed into fuel rods or fuel block, as the biomass boiler fuel, but also for cooking fuel, compression molding a biomass fuel burning than traditional biomass density, combustion efficiency, storage and easier to use when the labor intensity of small, auxiliary heat source is a good way.
Solar heating due to thermal density of the lower end, collector temperature is difficult to achieve a higher level. General
Radiator Require a higher heat medium temperature (70 degrees Celsius), while the solar system is not easy to reach the water temperature requirements. Therefore, solar heating systems, radiant floor heating usually means the end of heating. Floor heating temperature required for hot water between 35 to 55 degrees Celsius is precisely the solar collector can provide suitable temperature.
Floor Heating System
To the ground surface as heat, heat the main way to spread radiation, and convection heat to radiator-based system compared to a better comfort, warm head and cool feet feel more in line with the body heat
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