The use of automatic control technology on the refrigeration unit has two main functions: on the one hand, it protects the normal operation of the machine and equipment; on the other hand, it protects the safety of the operator and automatically adjusts the machine equipment reasonably. According to relevant statistics, automatic control can save energy by 10% and 15% than manual control, and the power saving effect is obvious.
Energy-saving in the design of the power supply system accurately calculates the power load, determines the reasonable power distribution capacity, and reduces the transformer loss. In the design process of the power supply system, it is difficult to accurately calculate the power load for the freezing project, because there are some in the freezing construction. The parameters (such as the required factor) vary greatly. There is no uniform standard. This requires the designer to accumulate and investigate relevant data, reflect the real load of the project as accurately as possible, and select the transformer of the appropriate capacity according to the calculation load. Loss of the transformer.
When selecting a transformer, try to use a transformer with a low loss, energy-saving type, a copper core wire with a core and a relatively large number of winding turns. The structure and size of the transformer are constant, but the magnetic resistance is effectively reduced. Reducing copper loss and increasing short-circuit reactance can achieve energy saving.
According to the distribution capacity, determine the economic load of the transformer. After the power load is determined, the power distribution capacity is determined, that is, the economic load of the distribution transformer is determined. There are two principles in determining the economic load of the distribution transformer: 1) The principle of the highest efficiency; (2) The principle of the lowest annual energy loss (the lowest annual operating cost).
According to the power of the transformer (including active power and reactive power), the loss is the smallest, that is, the principle of highest efficiency, and considering the initial investment of the transformer to determine the capacity of the transformer. Although it is difficult to ensure that the transformer works in the highest efficiency state in the freezing construction. However, the freezing construction period is relatively short, and this method should be the better choice. It is a method often used by power supply and distribution companies to determine the transformer capacity according to the method of minimum annual energy loss and minimum annual operating cost.
The energy-saving compressor in the process of using the energy-saving compressor during the use of the equipment is an indispensable equipment in the freezing construction. It consumes a large amount of electricity. If the efficiency of the compressor can be improved during use, the power consumption can be reduced. , saving costs and improving efficiency. When using the compressor, the following points should be noted: (1) When a small amount of cooling is required during the freezing construction process, it is better to use a low-capacity air compressor to make the compressor according to the actual progress of the freezing construction project. Operating under high load conditions, reducing power loss; reducing costs. When the refrigeration capacity is large at the initial stage of freezing, the high-capacity air compressor is operated at a high load, that is, the efficiency of the compressor is improved, the formation of the frozen wall is accelerated, and the cost is saved. However, in the course of use, it is necessary to prevent the phenomenon of large horse-drawn cars, that is, the compressor works under low load, which will cause unnecessary loss; at the same time, it is also necessary to prevent the phenomenon of small horse-drawn carriages, that is, air compressor capacity. If it is too small and the load is too large, it will cause great damage to the compressor, reduce the service life, and even cause the air compressor to be destroyed. At the same time, it may cause less cooling capacity, and cannot output the cooling capacity required during design, and prolong the freezing time. Not only will it not be able to save energy and reduce consumption, but it will delay the construction period and increase investment.
(2) Strictly control the compressor oil pressure and oil level, and regularly lubricate the oil. The oil pressure and oil level are too high, the fuel consumption is increased, and the power loss is increased. The oil accumulated in the system should be periodically discharged to improve the heat transfer effect of the system and reduce the power consumption.
(3) After the compressor is running for a period of time, parts may be worn or damaged, and the sealing performance may be poor. These will lead to an increase in power consumption. Therefore, the compressor should be regularly inspected during the construction process so that the compressor components are in normal working condition. To reduce power loss.
Regular defrost to improve the heat transfer efficiency of the condenser. During the use of the evaporator, the frost layer accumulates thicker and thicker, resulting in thermal resistance. If it is not removed in time, it will affect the heat transfer efficiency, reduce the cooling capacity and increase the power consumption. Therefore, it should be timed to flush the tank to improve the heat exchange efficiency of the evaporator and reduce the loss. However, defrosting will also increase the system load and increase the energy consumption, so the time interval of defrost should be strictly controlled.
Energy saving of the pump during use (1) Clear the flow passage blockage or impurities in the water pipe/impeller in time to increase the water output of the pump; (2) Increase the motor speed and enhance the power of the pump. In order to increase the motor speed, the power frequency can only be increased. The method of increasing the power frequency is to convert 50 Hz AC into DC power through the electronic component diode rectifier, and the DC power is converted into AC power for the motor through the inverter control circuit and the power electronic component IGBT. . As long as the parameters of the variable frequency control circuit are changed, the frequency of the output power source and the speed of the motor can be changed, thereby changing the efficiency of the water pump.
Conclusion In the design and operation process of frozen sinking construction, comprehensive treatment of various losses, through effective energy-saving measures, energy saving, efficiency, energy saving can be more than 20%, can create greater profit margins for enterprises.
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