Cooling Tower Sequence Of Operation
Sequence of operation 15985 3 note.
Cooling tower sequence of operation. A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. 3 cooling towers operate with operation of their associated condenser water pump or with the operation of the acu condenser pump see sequence 41. The sequencing for the logic does not apply to the remote control selection. Concern for the operation of the cooling tower.
Each ddc controller to perform an enthalpy calculation to determine when it is more energy efficient to use outside air for cooling. The chiller is isolated and the water from the cooling tower and the conditioned space is bypassed to the heat exchanger. The towers themselves are enclosed steady flow devices for cooling water by evaporation through direct contact with air. Cooling tower ct 1 2.
Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet bulb air temperature or in the case of closed circuit dry cooling towers rely solely on air to cool the working fluid to near. They extract heat to the atmosphere through evaporative cooling. In auto mode the sequencing logic controls each component based ona reference signal and a setpoint. Cooling towers work on the principle of heat rejection.
Warm condenser water is sprayed over a media or fill material and air is moved through the material via a fan. Closed loop cooling tower sequence of operation thread tools. The most common cooling towers are cross flow type. For most industrial manufacturing electric power generation and even air conditioning needs cooling towers are a critical element of the design.
Sequence of operations excerpt chilled water system consists of one 1 600 cooling ton trane cvhe 3 stage centrifugal chiller with associated chilled water pumps condenser water pumps and one 1 two stage cooling tower supplies chilled water to all fan unit cold deck coils for building cooling. View profile view forum posts view forum threads professional member join date feb 2017 location new york posts 1 661 post likes we have very few evaporative condensers in our area that i ve seen. Ice will form first at any of the air water interfaces in the cool ing tower such as the inlet louver area. With operation of a pump open selected tower supply isolation valve and allow tower temperature control to function bas.
Based on these data and the enthalpy calculation ddc controller will modulate outside air. During the free cooling operation the cooling tower does not need to remove the heat of compression since the chiller is not operating. This cold water is produced at the cooling towers which makes the selection and operation of the towers an integral component to maximizing the overall system efficiency. Designer uc to choose between eec and tec.
The goal is to. Low ambient conditions allow the cooling tower to provide chilled water.
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