Release time：2019-09-06 | Source：HUA LI JI DIAN.
Analysis of the principle of energy conservation
1、The principle of power saving can be seen by the principle of the pump of the fluid transmission equipment: the flow rate of the pump is proportional to its speed, the pressure of the pump (the pressure) is proportional to the square of its speed, and the shaft power of the pump is equal to the product of the flow and pressure, so the shaft power of the pump is three times the power of its speed. According to the above principle, it can be seen that changing the speed of the pump can change the output power of the pump. For example: if the power supply frequency is reduced from 50Hz to 45Hz, then P45\/P50 x 453\/503 x 0.729, i.e. P45 s 0.729P50 (P is the motor shaft power); 0.512P50 (P is motor shaft power)
2、The principle of freezing and cooling cycle saving power Is now qualitative analysis of the principle of power saving of refrigeration and cooling cycle system. It is assumed that a circulating water pump is changed to variable frequency control, the average flow rate is 0.8;Power-saving rate ( W original - W power-saving) \/ W original x 100% s (1-W power-saving \/ W original) x 100% W - P x T; ? ?Power-saving rate(1- P Power-saving/P Originally) ×100% =[1-（n Power-saving/n-Originally）3]×100% =[1-（0.8）3]×100% =48.8%≈49%； ?(Note: W: Work, i.e. the power consumed by the pump; P: power; T: time; Q: flow; H: head; n: speed; K 1: coefficient; K 2: coefficient K 0: coefficient)
Effect analysis
1、The original unit of the motor will appear a large impact current, the use of energy-saving system control, can make the motor start ingress with current rise flatly, without any impact;?With the use of variable frequency control, the motor can be soft stop, to avoid the damage caused by regenerative current, is conducive to extending the service life of the equipment.
2、This energy-saving control system system adopts the energy-saving system equipment of Sweden's REGIN Swiss, combined with the non-differentiated software identification of hardware operation, and no need to configure the refrigeration pump, cooling water pump, cooling tower fan, valve control box and other control equipment.
3、Save your unit machine room workers labor intensity, due to the high level of automation, there is no need to configure the central air-conditioning room for the building control system. The energy-saving system can realize the modern computer control of the central air-conditioning system, achieve the unattended effect, realize the automatic energy-efficient operation of the central air-conditioning system, and facilitate the seamless connection with the building control system.
4、With the REGIN Ruijing energy saving control system, the circulation speed of water can be controlled according to the temperature signal feedback from the temperature sensor, so as to carry out accurate temperature control. Without the need for a separate hydraulic balancing system, the air conditioning refrigerant flow can be dynamically adjusted as the load changes.
5、Circulating water system with valves to adjust the speed of water circulation, when the valve closed hours, circulation of water when the resistance increases, waste a lot of electrical energy.?With the use of variable frequency control system, the valve can be opened, by adjusting the speed of the motor to adjust the speed of water circulation, saving a lot of electrical energy.
6、to greatly reduce the noise when the motor is running and to save the amount of steam during operation.?As can be seen from the above, when the flow (air volume) control is carried out with the energy-saving system, a large amount of power can be saved. Refrigeration, cooling circulation system in the design is in accordance with the maximum demand on-site consideration, the pump according to the maximum operating conditions of a single equipment to consider, in the actual use of more than 95% of the time cycle pump are working in the non-full load state.The use of valve adjustment not only increases the system cycle pressure and throttle loss, but also causes the whole heating system to work in a fluctuating state due to the regulation of the cycle, while the installation of the variable frequency control system can solve the problem once and for all, and can also achieve automatic control and recover the investment through energy saving. At the same time, the soft start function and smooth speed control characteristics of the inverter can realize the smooth adjustment of the system, so that the system work condition is stable, and extend the service life of the unit and pipe network.
7、The energy saving effect is remarkable: the whole unit system is more than 28% energy saving.
