Explain the main function of a surge tank and describe how it works in a hydroelectric scheme. A 900 mm steel pipe 1000 m long supplies water to a small power plant. To protect against the effect instantaneous closure of a valve at the plant, a simple surge tank 2 m in diameter is fitted in teh pipeline system. Given that the original flow is 5 m/s, calculate the height required for the surge tank. The surge tank is not to overflow. Calculate also the time required for the water level in the surge tank to reach its maximum value. Ignore friction losses. Explain the main function of a surge tank and describe how it works in a hydroelectric scheme. A 900 mm steel pipe 1000 m long supplies water to a small power plant. To protect against the effect instantaneous closure of a valve at the plant, a simple surge tank 2 m in diameter is fitted in teh pipeline system. Given that the original flow is 5 m/s, calculate the height required for the surge tank. The surge tank is not to overflow. Calculate also the time required for the water level in the surge tank to reach its maximum value. Ignore friction losses