Circular cooling system and control method thereof
A control method and circulating water cooling technology, applied in the field of cooling water circulation, can solve problems such as large energy saving space, insufficient control, and power waste, and achieve the effects of improving energy efficiency, refining control logic, and reducing power consumption
Pending Publication Date: 2018-10-12
CHANGSHA ECONOMIC & TECHNICAL DEV ZONE XIANGYUAN POWER SUPPLY CO LTD
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Problems solved by technology
[0003] However, in this design, the cooling water pump is a power frequency water pump, and the water pump and the fan adopt a linkage design, which starts and stops synchronously according to the target temperature of the circulating water. The design is simple and clear, but the control is not fine enough, which will cause a lot of unnecessary waste of electricity, and the energy saving space is large.
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Embodiment 1
[0031] A circulating water cooling system connected as figure 2 As shown, it includes a plate heat exchanger 1 and a circulating water pipeline and a cooling water pipeline for heat exchange in the plate heat exchanger 1, the circulating water pipeline includes a circulating water pump 4 and workshop equipment 5, and the cooling water pipeline includes a cooling water pump unit and a cooling tower 2. The cooling tower 2 is equipped with a cooling fan unit, the cooling fan unit includes 3 frequency conversion cooling fans 8, the cooling water pump 3 includes 3 frequency conversion cooling water pumps 3, and the circulating water pipeline is located at the outlet of the plate heat exchanger 1. The first temperature sensor 6, the second temperature sensor 7 is arranged at the outlet of the cooling tower 2 in the cooling water pipeline, and the system includes a third temperature sensor (not shown in the figure) for measuring the outdoor wet bulb temperature, and the system also i...
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The invention relates to a circular cooling system and a control method thereof. A cooling water pump of the system is changed from a power frequency pump to a variable frequency pump; a cooling fan is changed from power frequency to variable frequency; meanwhile, three temperature sensors respectively monitor a water outlet temperature of circulating water, a water outlet temperature of cooling water and an outdoor wet ball temperature; and a controller respectively controls the frequency and the working number of the cooling water pump and the cooling fan. Compared with the prior art, the startup, the stop and the frequency of the cooling pump are controlled through the temperature of the circulating water, the startup, the stop and the frequency of the cooling fan are controlled throughthe temperature of the cooling water, and the outdoor wet ball temperature is added as a reference frame, so that the control temperature target of a cooling tower is optimized, and the cooling efficiency of the cooling tower is maximized.
Description
technical field [0001] The invention relates to the technical field of cooling water circulation, in particular to a circulating cooling system and a control method thereof. Background technique [0002] In the production workshop, there are a large number of production equipment that need cooling water for cooling, such as air conditioners, compressors, etc. The circulating water transfers the cold energy to the workshop equipment and is cooled by the plate heat exchanger, while the cooling energy for the circulating water comes from the cooling water of the cooling tower. The cooling tower is equipped with a fan to cool the cooling water. In the existing control method, its logic is as figure 1 As shown, first judge whether the circulating water outlet temperature T1 of the circulating water coming out of the plate heat exchanger is greater than 23°C, if not, turn off all cooling water pumps and all fans; if so, judge again whether the circulating water outlet temperature...
Claims
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Login to View More IPC IPC(8): F25D17/02F25D29/00
CPCF25D17/02F25D29/00F25D2700/12
Inventor 叶俊张健卫
Owner CHANGSHA ECONOMIC & TECHNICAL DEV ZONE XIANGYUAN POWER SUPPLY CO LTD