In power plants, the power generation reduced and with low operating efficiency, once particulate matter and sludge clog the air filters of gas turbines eventually. The differential pressure transducer is an idea solution to monitor continuously the both sides pressure between filter, then get data about turbine filter when it need be cleaning or replaced. As an essential machine, gas turbines are very important for modern power generation system.
As we know, the natural gas or coal is input in turbine filter combustion chamber, the fuel or combusts are mixes with pressurized air while igniting, then the combustion rotates blades of turbine, the compressor was driven by the blades drive the compressor, at same time it directs pressurizes additional air into the combustion chamber, spin the generator to create electricity. The air filter is very important for power generation, because gas turbine need clean air and fuel without particulate, but over time, the filter will be covered by particulate, it's a liability for it, the pressure loss and power out reduce proportionately, we have to rectify it, or else the turbine operational lifetime will be short. The even mere particulate also drop in pressure when ambient air flows through it, though the filter is new, the pressure reduce more once the filter collects sludge, moisture and particulates, thus it become dirty quickly. When the pressure reduce a certain level, the contaminated filter should be cleaned, therefore the power plants required accurate pressure measurement equipment to monitor pressure loss.
Differential pressure transducer is ideal application for this case.
The Demand for Continuous Monitoring of Turbine Filters
Filter manufacturers suggest two pressure-loss values: 1) the first installed value 2) the value of "fully loaded" and it should be replaced or cleaned.
The process engineer demand continuously pressure loss record data to monitor various factors which impacted filter performance, to identify valuable factors.
For example, in case the record shows the pressure reduce seriously on one fog day, it suggests that the material of filter is not suitable well to moisture condition.
In damp climates, people convert a more moisture-resistant filter could increase the operating efficiency of a gas turbine, at same time reduce replacement filter and labor costs.
Continuous monitoring also help the engineer to judge whether the filter is clogged or other reason cause a gas turbine's poor performance, and it's useful for engineer to decide to clean or replace the filters.
Differential Pressure Transducers Provide Accurate, Real-time Data about Pressure Loss
Gas turbines common use Differential pressure transducers and DP transmitters, which send readings to remote locations, are commonly used in gas turbines. These small devices report the pressure difference as pressure loss, when measure the pressure on both sides of the filter. At most facilities, both high-pressure and low-pressure events will trigger an alarm in the control system. High-pressure alarm typically open while a filter is fully loaded or entrained with moisture. Most low-pressure alarm relate to the filter media tears or material failure, or leakage through the filtration system seals. When the pressure loss becomes excessively high, the alarm will be shut down, since a completely blocked filter can lead turbine components to overheat and become damaged.
Compact XVYAN Differential Pressure Transmitter XY-PTDP
Offers Accuracy and Flexibility
With a "0~0.6kpa; 0~2.5kpa; 0...6MPa" range, it is applied to filter monitoring in new turbines produced , with a small footprint, lightweight can free fit in tight spaces on compactly designed gas turbine skids.
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