How to Find Out Work Done by a Compressor?
📌 Introduction
Compressors are vital in industries such as HVAC, refrigeration, chemical plants, and utilities. They consume significant energy, so calculating the work done by a compressor is essential for energy managers, auditors, and engineers. This helps in assessing performance, identifying savings opportunities, and preparing for technical interviews.
⚙️ Formula for Work Done by a Compressor, the work input for an isentropic compression process is given by:
🔍 Step-by-Step Process
1. Measure inlet conditions: Pressure (P1) and temperature (T1).
2. Measure outlet pressure: (P2).
3. Select polytropic index (n): For air, typically 1.3–1.4.
4. Apply formula: Calculate work per kg of air.
5. Multiply by mass flow rate: To get total compressor power requirement.
📊 Practical Example
🌍 Importance of Work Calculation
- Energy Audits: Identifies high energy consumption and saving potential.
- System Design: Ensures correct motor sizing and compressor selection.
- Maintenance: Detects inefficiencies due to wear or leaks.
- Interview Prep: Common mechanical engineering interview question.
✅ Conclusion
The work done by a compressor can be calculated using the isentropic compression. Practical examples show how pressure ratio, temperature, and polytropic index affect energy consumption. Understanding this helps engineers improve efficiency, reduce costs, and prepare for interviews.
