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3 changes the current capacity system (VWV)
So-called changes the current capacity system (VariableWaterVolume, is called VWV), is enhances the heat source machine by the certain water temperature supply air conditioner the efficiency, but changes by the special water pump delivers the water volume, while convenient achieves saves the effect which the water pump uses electricity. Changes the water volume system to depend on the water pump to the water pump system energy conservation efficiency the control mode and the VWV use proportion but different, whether there is the general VWV control mode section speed change (SP) and the bidirectional valve control mode. Above three kind of air-conditioning system is the present building air conditioning most often the system which designs. The central air conditioning control also is the pipeline, the fitting, the valve body or the valve centralism hypothesis control fluid provides the air conditioning. Therefore effectively combines the central air conditioning control namely to be able the active control to consume energy, the design conforms with the energy conservation the air-conditioning system.
In recent years, the our country majority of areas, in particular southeast the coastal area summer the air conditioning energy consumption suddenly was rising, the air conditioning uses electricity the tendency which increases sharply to cause the electrical network power supply to be intense. Statistics have indicated, our country every year the burning hot season air conditioning consumed the electricity to occupy 1/3 in recent years which the entire society uses electricity, the massive electrical energies swallow by the industry and the civil construction air conditioning, in particular large-scale construction central air-conditioning system, like each kind of commercial construction (office, market, hospital, hotel and so on) central air conditioning because its space big, person current capacity many, operation time long, management complex characteristic, causes the movement energy consumption to be quite high, the commercial construction air conditioning energy consumption nearly occupies its total energy consumption 50%. The central air conditioning design capacity is according to the biggest load computation, but in a major part building year only has several dozens days time central air conditioning to be at the biggest load condition. The central air conditioning cold load throughout is in during the dynamic change, like every day sooner or later, each season in turn, every year samsara, the environment and the humanities condition, real-time will be affecting the central air conditioning cold load. General, the cold load undulates in 5 ~ 60% scope, the majority building every year at least 70% is in this kind of situation. But the majority central air conditioning actually opening machine capacity far is smaller than the installed capacity, if take the most greatly cold load as the maximum work rate actuation, creates between the actual need cold load and the maximum work rate output contradiction, actually creates the huge energy waste, the national economy and the society develops for brings the very tremendous influence. This has brought the stern topic for the central air conditioning energy conservation control, also gives the general energy conservation control domain the worker brought enormously has displayed the talent the space.
The power load gap increases, the electric power supply tense aspect with difficulty obtains in recent years relaxes. Therefore, energy conservation in particular electricity saving, not only has the significant social significance moreover to have the urgent practical significance. Positively studies the development promotion green environmental protection new air conditioning technology and the equipment, the suppression air conditioning energy consumption increases, has become the building warmly to pass air conditioning domain urgent and the popular research topic. The dependence technology innovation, the system innovation, the energy conservation falls consumes, enhances the energy use efficiency, guaranteed are least in the "energy consumption, in the environmental pollution smallest" foundation, realizes the "energy conservation first, structure many Yuan, environment friendly" energy developmental strategy.
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