信息来源: http://www.hqldsb.com 时间:2017-5-17 11:01:35
When the brine unit is used, the cooling water tower and the water pump are required, and the temperature of the precipitation can be lower when the cooling tower is used independently, but its cooling effect is not very obvious and unstable. In everyday use, regardless of what kind of machinery and equipment, we primarily think about the power consumption of the size. As we all know, some equipment at the time of operation, the damage occurred higher. Below for cooling water tower operation as an example, analysis will form what unnecessary waste.
Incorrect operation of cooling tower system: operation of cooling water tower, cooling water tower and operation of cooling tower fan.
We all know that saline water machine startup, host load, condensation pressure is high, so most of them adopt a normal operating unit to open the two sets of cooling tower fan practices (that is to open a cooling tower fan) standby group decreased after. Then close the load of a cooling tower fan, this approach the questions in operation without rebuke, closed cooling tower fan in the future did not keep up, easy to form waste.
Here is an example of the two cooling towers at A and B to illustrate this question:
Chilled water pump, cooling water pump, saline water machine cooling tower and cooling tower fan, are designed according to the matching, originally one can operate normally, but in order to quickly decrease the host load, temporarily open a cooling tower fan, is really a useful way. The actual operation and misoperation are analyzed as follows:
It is assumed that the cooling water meets 68, 6kPa (0.7kg / cm), the flow rate of pressure drop is 120kg / s, A and B, two cooling towers and fans work together. In theory, the water quantity in and out of the A and B towers is 6Okg / s, and the actual water temperature is usually about 2 degrees lower than that of the 1 cooling towers. When the main load is lowered, two cooling towers are opened and the fan is spoiled, so turn off the B cooling tower fan. The doubt is that after the B tower fan is turned off, the inlet and outlet valve of the B tower is not closed, and the cooling water of 60kg / S is not cooled by the fan. B tower is not cooled 60kg / s water and A tower after cooling 60kg / s water collection, into the condenser, its water temperature than open A tower (refers to closed B tower water.120kg / s water from the A tower through) to 2 higher
At about 4 degrees Celsius, and this condition stops until the unit stops working. The addition of cooling water temperature will inevitably lead to the increase of condensing pressure, the addition of power consumption of main engine and the decrease of refrigerating capacity.
Most salt water unit operators operate the cooling tower by turning all the cooling towers in and out of the water valve, while the cooling tower is driven or stopped according to the demand. We usually pay attention to the cooling tower fan power consumption, and neglect the cooling water temperature progress, and worsen the unit running conditions, forming long-term electrical waste.
Although cooling water tower is the subordinate equipment in the cooling system of water cooling chiller, it is an important task to send out the total heat absorbed by the whole system. Therefore, whether the cooling tower is operated accurately or not is directly related to the whole system
Refrigeration and energy saving. In contrast because of misoperation of cooling tower above, and from the start to the whole course of shutdown there, so the loss is very big, suggest that saline water machine operators in the operation process of some extra attention to prevent unnecessary waste form.