Umm Al Houl Combined Cycle Power Plant is part of Qatar’s biggest power and water projects and will be in the Qatar Economic Zone 3, south of the capital city of Doha. The power plant will be able to supply up to 2.52GW of electricity and 590,000m³ (136 million gallons) of drinking water a day to 2.5m homes in the area. The CW system consists of four similar condenser blocks. Two blocks are tied together at a common pump manifold. The manifold receives the discharge from 4 vertical pumps to 2 condensers. Normally all the pumps are in operation. These pumps are sized for 2x50%service based on the requirements of a single condenser. The pumps take cool seawater from a common intake structure and after passing it through the condenser, discharge the heated seawater into a seal well with a weir. SCOPE: The scope of the document is to evaluate the susceptibility of the Circulating Water (CW) system to a water-hammer. Different events such as opening and closing valves, starting and stopping pumps will be simulated. The objectives of this Surge analysis are as follows:
1. The maximum pressure in the piping system under any transient scenario is within
2. the limits of the limiting pressures of GRP piping material.
3. The minimum pressure is above the vapor pressure of the fluid
4. The valve operation timing in accordance with pump start-up and closure is acceptable.
5. The pipe sizes, material properties are acceptable to keep the surge pressures within limits.


  • Introduction
  • Operation philosophy of Surge analysis
  • Summary of Input considered
  • Schematic drawing of the system
  • Transient Cases defined for the analysis
  • Summary of Output results
  • Discussions and recommendations
  • Graphical representation of results
  • Input and Output results generated from Software