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英文原文
How Air Conditionernergy conrvation technology
香菇肉酱rearch
1. Introductions
叶的成语The energy conrvation may say is the building character automatic control system starting point and the home to return to. It is well known, in the intelligent construction, HV AC (heating, ventilates and air conditioning) the system consumes to have to occupy the building consumption total energy enormous partial proportions, approximately about 50% ~60%. Specially cold: East the unit, the cooling tower, the circulating water pump and the air conditioning unit, the new atmosphere unit, all are consumes energy the big houhold. Therefore really has esntial develops one effective air-conditioning system energy conrvation method, especially us is in improves in the existing building air-conditioning system automation the aspect.
DDC (Directdigitalcontr01) the direct of numerical control, is a structure simple operation easy control d
evice, it may borrow by the connection switches over the equipment to make the systems control along with the load change, like the air conditioning cold water circulatory system, the air conditioning box frequency conversion automatic amount of wind adjustment and the cooling tower radiation ventilator frequency conversion holds controls and so on, may let an air-conditioning system more effective revolution, like this, not only brings the very big economic efficiency for the estate management, moreover also may cau the system to move under a better operating mode, thus lengthens the equipment the rvice life as well as achieved provides goal of the comfortable air conditioning environment and the energy conrvation.
The general building commonly ud air-conditioning system has CA V, V A V, VWV and so on, respectively has differently holds controls the way, all may u DDC to control.
1）decides the amount of wind system (ConstantAirV olume, is called CA V).
Decides certainly the amount of wind system the amount of wind which blows out for the air conditioner certainly, provides coldly (is warm) the gas which the air conditioning region needs. When air conditioning region load variation, then changes the blast temperature to deal with in the room to shoulder, and achieves the
maintenance indoor temperature to the comfortable area request. The commonly ud central air-conditioning system is AHU (air conditioner) and the cooling water pipe system (the FCU system). The two generally decides the amount of wind (CA V) to supply the air conditioning area, in order to deal with in the room the partial loads change, decides the amount of wind system in AHU to change warm by the air conditioner blows of process, controls in the general FCU system by cold water valve ON/OFF adjusts the blast temperature.
2）changes the amount of wind system (V A V)
Changes the amount of wind system (VarlableAirV olume, is called V A V) is the air conditioner (AHU or FCU) may move changes the amount of wind. The commonly ud central air-conditioning system is AHU (air conditioner) and the cooling water pipe system FCU system. The two generally decides the amount of wind (CA V) to supply the air conditioning area, in order to deal with in the room the partial loads change, decides the amount of wind system in AHU to change warm by the air conditioner blows of process, controls in the general FCU system by cold water valve ON/OFF adjusts the blast temperature. However the two has wasted the massive energy on the blast system. Becau in long-term low load time the air feeder also carries out the entire amount of wind revolution to consume the electricity, this not only is not easy to maintain in the stable room humidity
the condition, also wastes the massive blasts revolution energy. Changes the amount of wind system is aims at the blast system to consume the electricity shortcoming the energy conrvation countermeasure.
3）changes the current capacity system (VWV)
有志不在So-called changes the current capacity system (VariableWaterV olume, 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 us electricity. Changes the water volume system to depend on the water pump to the water pump system energy conrvation efficiency the control mode and the VWV u proportion but different, whether there is the general VWV control mode ction speed change (SP) and the bidirectional valve control mode. Above three kind of air-conditioning system is the prent 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
一片落叶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 conrvation 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 us electricity the tendency which increas sharply to cau the electrical network power supply to be inten. Statistics have indicated, our country every year the burning hot ason air conditioning consumed the electricity to occupy 1/3 in recent years which the entire society us 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 becau its space big, person current capacity many, operation time long, management complex characteristic, caus 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 veral dozensdays 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, eac
h ason in turn, every year samsara, the environment and the humanities condition, real-time will be affecting the central air conditioning cold load. General, it also gives the general energy conrvation control domain the worker brought enormously has displayed the talent the space.
The power load gap increas, the electric power supply ten aspect with difficulty obtains in recent years relaxes. Therefore, energy conrvation 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 increas, has become the building warmly to pass air conditioning domain urgent and the popular rearch topic. The dependence technology innovation, the system innovation, the energy conrvation falls consumes, enhances the energy u efficiency, guaranteed are least in the "energy consumption, in the environmental pollution smallest" foundation, realizes the
"energy conrvation first, structure many Yuan, environment friendly" energy developmental strategy.
In our telecommunication production, air conditioning energy conrvation supervisory work weaker,
the energy waste phenomenon is rious, therefore strengthens air conditioning the maintenance management and the technological transformations, may achieve the energy conrvation the goal.三国演义的观后感
2. Air conditioning energy conrvation system rearch survey
1) Through the load control, achieves the energy conrvation goal. (a) The burning hot ason new atmosphere load occupies the entire cold load 25-40%, reduces the new atmosphere load, reduces the new atmosphere energy consumption, the choice smallest esntial new amount of wind, also can achieve the goal. But the new amount of wind smallest supply on the one hand the country had the standard, moreover the new amount of wind insufficient will affect the air quality, will endanger the human body health. (b) Outside the optimized construction the surrounding protection structure energy conrvation design, us the heat prervation thermal insulation material technology, reduces the air conditioning load, the realization construction energy conrvation, but simultaneously also caus the building cost ri, the promotion to receive the certain limit.
2) gathers can the air conditioning. Gathers coldly through the ice, avoids the daytime to u electricity the peak, at night stores up the air conditioning freezing water refrigeration, daytime does not start the air conditioning main engine only to u the aqueous system to circulate. This method it
长隆野生动物世界
lf certainly does not conrve energy the province electricity, but optimized the electrical network power supply, to already implemented the time sharing electrovalence the area, played "to economize does not conrve energy" the role, had the area promotion significance.
3) water source heat pump. Is opposite says to the air and the soil, the water is the most ideal spatial transfer cold heat source, the water source heat pump also therefore has the environmental protection, is highly effective, the energy conrvation and so on the multitudinous merit, but our country water source heat pump engineering rearch is not very mature, compares with some developed countries also has the certain disparity. At the same time, the water source heat pump although has very many merits, but receives the geology, the environment, the policy and so on the limit quite is also big, this caud the water source heat pump to be restricted in an our country more widespread application.
中秋节快乐英语4) In the central air-conditioning system individually consumes energy the equipment energy conrvation transformation. (a) Air blower and water pump general frequency changer velocity modulation energy conrvation, this is at prent us more technologies. This method simple practical, electricity saving effect obvious, but product and so on water pump, air blower is the system auxiliary engine partially, occupies the overall system energy consumption approximately is 4
古代人的衣服0%, therefore the excavation space is limited. (b) The refrigeration main engine, the refrigeration unit's power consumption holds the very big share in the air-conditioning system, saves this part of consuming energy is the entire air-conditioning system economy movement key. At prent generally all us reduces the indoor temperature standard, enhances the cold water temperature and so on the measure realization refrigeration main engine energy conrvation.Above veral methods deficiency has only considered the partial energy conrvation, but had not considered from the overall system overall situation.
5) the dynamic load track energy conrvation control system take the entire central air-conditioning system as a body, unceasingly changes the condition according to the air conditioning area load, through changes in the main engine and the circulatory system various parameters movement change situation, the lock following load change, realizes in meets the load need under the premi the prompt quota supplies cold quantity, namely achieves "according to must supply", basically achieved "does not lag, are not many for, many gives" the goal. This method not only compared with the permanent current capacity water pump gentle breeze machine has realized the auxiliary engine largest scale energy conrvation, moreover optimized the main engine movement operating mode, might achieve the overall system conrved energy 15-35%. This is this topic rearch key point.
3. Dynamic loads tracks energy conrvation control plan
The traditional central air-conditioning system adjustment plan is: Us the permanent current capacity pattern or the heat sink side permanent current capacity but the load side changes the current capacity pattern, the system must shoulder is according to the biggest load, the worst meteorological condition and the worst u working conditions designs, when actual moves 50% above time, the system must shoulder all below 50%, the existence has the enormous energy dissipation. Also when shoulders Q when the change, the traditional system movement parameter simply cannot achieve the synchronized adjustment, the lag adjustment method
