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Electrical design of building energy efficiency


, Using a variety of energy-saving switch or device is an effective energy-saving methods. Under the lighting used, and can be taken to control the lighting district,[link widoczny dla zalogowanych], or proper lighting switch points Il2.3 increase energy-saving high-efficiency fan and water pump fan and water pump; attention to selection and matching. Select the type and rating fan and water pump should be as far as possible consistent with the condition, the equipment running at high efficiency range; speed control traffic, reduce throttling losses. Often require changes in the production process flow, multi-site use of baffles or valves to regulate air flow or by shorting some of the methods, the waste is very serious, more economical method is to adjust the speed of the original motivation to regulate traffic; rational design of pipe network reduce the pipe resistance. Pipeline network design, the diameter of the trend and should be carefully calculated and called pipe wall has a high finish to reduce the power loss; in the network or on the impeller coated composite materials. In recent years the advent of the XCA composite material has high elasticity, high strength and easy with the metal bonding characteristics of the coating in the pipes of its internal and impeller,[link widoczny dla zalogowanych], the impeller can be reduced, pipe and fluid friction, reduce wear and tear; use energy-efficient measuring instruments. Measuring instruments are indispensable to the network of subsidiary equipment. Common Venturi meter, orifice meter, elbow flow meters, electromagnetic flow meters and ultrasonic flow cards are in use, the larger head loss, and electromagnetic flowmeter and ultrasonic flowmeter head losses are very small, although the price high, but long-term operating conditions,[link widoczny dla zalogowanych], the technical and economic indicators is a superior 14}. 2.4 The reasonable choice of energy-efficient distribution transformers transformer capacity and Number. Under the load condition, considering the investment and annual operating costs, a reasonable distribution of the load, select the load capacity and power transformer to adapt, to work in high areas. Transformer and the transformer load and the loss of efficiency, but also with load power factor is related to use energy-saving transformer, replacement or reconstruction of high energy consumption of the transformer. According to statistics, use energy-saving transformer and transformer-circuit voltage compared to the no-load losses and short-circuit losses, 1OkV series were reduced by 41.5% and l3.9%, strengthening the operation and management, to achieve economic operation of the transformer. In the case of load change, such as the number and put into operation the same number of transformer units, the load factor and efficiency will be changed to make it beyond the scope of economic operations, and therefore in time or the removal of part of the transformer to prevent the light load and transformer No-load operation. Long-term light-load (load rate of 3O% or less) of the transformer, the actual load should be replaced when necessary, small-capacity transformers to achieve energy saving. 2.5 HVAC system HVAC system energy efficiency of public buildings the energy consumption of buildings account for at least more than 5O% of total energy consumption, the system energy saving potential. About the specific principles should be followed: Optimal Control of start and stop electrical and mechanical equipment, variable air volume, variable flow system optimal control; winter and summer when the pump is divided into part-load control; with ice storage system combining low-temperature air control energy-saving control parameter t, standard setting, including temperature, enthalpy control, the use of the indoor CO2 concentration control fresh air and so on. 2.6 Power Saving Device for AC automatic voltage stabilizer centralized control of power saving devices, the use of loss, distortion of the internal energy absorption system and converted into useful electrical energy,[link widoczny dla zalogowanych], through the device itself, the inductance and mutual inductance formed inductive load system can improve the utilization of electric power load system, which improve the power factor. Energy-saving devices in the power system in series. System input power of centralized control and multi-faceted management, improve power quality, power supply parameters will be adjusted to the load device most suitable working condition 【5J. 3 Conclusion life of the building is usually a lO0 for 50 years, in the long-term use, both the power system or electrical equipment,[link widoczny dla zalogowanych], there is a huge energy saving potential. Therefore, in order to achieve distribution system and economic operation of electrical equipment.
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