Is it better to control the inlet or outlet water volume of the cooler?

Generally, the cooling water outlet is controlled to facilitate control of the temperature of the cooled medium.

Controlling the outlet can ensure the heat exchange efficiency of the cooler. If the entire circulating water system is relatively large. The significance of export control is not great.

Control the cooling water outlet flow for easy control.

You can control both the inlet and the outlet. If you use a regulating valve to control it, you should still control the inlet. The pressure inside the control outlet cooler will be a little higher.

If you ask an instrument engineer about this issue, 9 out of 10 of them will tell you to adjust the return water flow. . My experience is that you can directly adjust the water supply. The regulating valve is directly installed on the water supply pipe close to the equipment nozzle. During the actual operation of multiple devices, it was found that the regulating valve installed on the water supply pipe has sensitive adjustment and stable control, while the return water regulating valve does not have such a good regulating effect (this does not mean that the return water regulating solution is not feasible). The so-called "guaranteeing that the circulating water is full" mentioned by my friend on the second floor is almost not a reason. This is a problem that should be avoided during piping. It is also very easy to solve. All piping personnel with a little experience know it. The advantage of controlling flow in the upper water is that the system responds quickly, the valve action is sensitive, and the PID parameters are easy to adjust. However, the return water adjustment has a lag. If it is a pressureless return water system, the adjustment difficulty will increase. If manual valve control is used, it is convenient and fast to adjust the water supply. If the cooling water volume changes greatly, it is best to slightly close the valve on the return water, and then adjust the water supply valve, and it will be easy to adjust. It is best to bring this kind of confusion to the scene to solve it. You will know it by doing an experiment. It will take about 20 minutes. It is not difficult.

It is possible to control entrances and exits! This does not hold true for improving pressure and heat transfer efficiency by controlling the outlet. The cooling water has a low inlet and a high outlet. For glass coolers and the like, if the outlet is controlled, the pressure will be too high, which may cause the cooling water pipe to leak. So I personally think it’s better to control Rukou! :handshake

I think it is better to control the outlet so that the medium can be fully cooled inside.

The control inlet for small flow is better, easy to adjust, and has a faster response speed. Control export lag is large. It doesn’t matter if there is a large amount of traffic.

I think controlling the outlet or inlet depends on the specific situation. If the temperature of the cooling medium exceeds 100°, controlling the inlet flow rate may cause air blockage and make water circulation difficult. If the cooling medium temperature is below 100°, controlling the inlet flow rate is faster.

Passing by, interesting, what kind of water is used for cooling when the cooling medium temperature exceeds 100°? Will the cooling water partially evaporate? What will be the outlet temperature of the cooling water? How to control?

Of course, this can be controlled, the pressure of the cooler is stable, the equipment is protected, and the heat exchange effect is maximized.

Our factory generally controls export volume.

The inlet should be controlled and the outlet should be controlled. If the pressure of the cooler is too high, the temperature will not be easy to control.

The outlet should be controlled. The heat exchanger should first ensure that it is filled with water, and then adjust the flowing water volume.

:) This depends on the physical and chemical properties of the medium being cooled. For example, in media such as sulfuric acid, if the water side pressure is large and the acid side pressure is small, once the heat exchange tube leaks, it will cause serious consequences. In addition to the liquid column static pressure, the water side pressure is mainly determined by the pump outlet pressure and water outlet resistance. From this perspective, it must be a controlled entrance. As for whether the cooling water side can be filled with water, it depends on whether the piping is reasonable, not the control of water volume. :handshake As for the cooling effect, since water is liquid, it mainly depends on its flow rate in the cooler, that is, the resistance drop of the cooler itself, and both of these are only related to the cooler structure and the actual water circulation volume, and have nothing to do with the valve being set at the inlet or outlet. This post was last edited on 2008-3-4 23:41 ]

Personally, I think it is better to control the outlet, which can fully realize heat exchange. Controlling the inlet can enhance the heat exchange effect, but the water consumption is large and it is not economically feasible.