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+ By kaupshenoyassociates
Manufacturers give compressor specification data such as FAD, power and other efficiencies at certain standard operating conditions. But, most compressors normally operate between two set pressure points for loading and unloading. Therefore app uses a hypothetical pressure ratio of average discharge pressure to ambient to compute different performance indices. Further, any change in operating conditions such as atmospheric pressure due to altitude, temperature, humidity etc. could also have considerable impact on compressor performance. A typical example is shown in screen shot. Thus app can be a helpful tool for different operation and maintenance personnel to evaluate compressor performance time to time.
Ambient properties such as atmospheric pressure, temperature and humidity values are taken as key input to the computation model. The app computes the pressure for any given altitude. Data for some of the higher altitude (> 1000m) cities around the world are also provided for convenience.
Compressor Specification Data:
A typical compressor specification data sheet is show in the screen shot. FAD, pressure rating and motor hp and rpm data are the minimum requirement based on manufacturers data sheet. Additional data pertaining to reciprocating cylinder data helps to determine the range for FAD for general verification. Volumetric efficiency is primarily depended upon cylinder clearance and generally present in most compressors and in the range of 2% to 8% of total swept volume.
As the compressor put more hours on service, the natural wear and tear could bring down the performance of any compressor. Therefore, it is often necessary to run tests to determine its capacity and also any excess leakage in the compressed air system. This app helps to run quick tests to estimate the losses and concern for any further investigation.
A comprehensive result summary provided that includes heat load for the inter coolers, moisture content etc. as shown in screen shot. Additional information is provided in app notes that includes FAD, leakage computation models for quick reference.
Tags: compressor fad calculation, compressor fad, system compressor, capacity, compressor specification sheet, compressed air, compressor applications, air compressor.
1. Modified screen layout with new toolbar buttons as shown in screen shots. All screen layouts have been preset to portrait for all text field accessibility.
2. Added buttons to compute ambient pressure and swept volume while editing when virtual key pad is displayed in the respective screens.
3. Added extra validation checks and now free from any run time exceptions in various Android devices.
4. Updated the computation model, display formats and app notes for better clarity.