Causes of water leakage in the liquid cooling pipe of the energy storage tank

Did water cooling distribution pipe leak in a 175 MW hydroelectric power plant?

This paper reported the investigation of leakage occurred on the water cooling distribution pipe in a 175 MW hydroelectric power plant. The pipe has been used around 2 years. The pipe has a function to flow through the cooling water from penstock to the heat exchanger.

What causes pipe leakage?

2. The leakage of the pipe occurred on the base metal and was initiated from the inner wall and due to the elbow of the pipe and excessive root penetration causing turbulent flow and severe erosion–corrosion. 3.

How does pressure affect leakage?

It is now well established that leakage is directly proportional to the pressure at the leak point in a pipe such that a pressure drop is inevitable. In order to compensate this drop in pressure, the pumping energy required to supply demand at a constant pressure has to be increased.

Does leakage affect pumping energy required in a distribution pipe?

In this paper, the impact of different types of leaks on the excess pumping energy required in a distribution pipe is investigated. It is now well established that leakage is directly proportional to the pressure at the leak point in a pipe such that a pressure drop is inevitable.

Why did a pipe leak on a base metal?

Nondestructive inspection found that the surface of inner wall of the pipe experienced erosion–corrosion and from metallography analysis, it is strongly evidenced that the leakage occurred on the base metal due to the severe erosion–corrosion at the localized area.

What causes water cooled wall pipes to fail?

This study investigates a specific failure case of water-cooled wall pipes in a thermal power plant. Unlike conventional failures caused by quenching cracks, the failure in this case involves passivated quenching cracks, which is a relatively uncommon and complex phenomenon.