Energy-Efficient Motor Retrofit Analysis in a Thermal Power Plant: A Case Study
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2025
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| author | Sandeep Singh Dr. Sarbjeet Kaur Bath |
| author_facet | Sandeep Singh Dr. Sarbjeet Kaur Bath |
| contents | This paper presents energy-efficient motors' retrofit analysis for low-tension (LT) auxiliary motors at the Lehra Mohabbat Thermal Power Plant (LMTPP), Punjab, India. The study focuses on considering the replacement of aging motors of class IE1 with the class IE4 motors of ABB, in the boiler and clarifier feed pump systems. An audit of motor inventory is conducted to assess their rated powers, load factors, and operational hours. Using nameplate data and catalog values, the analysis has been done to evaluate energy and cost savings and to estimate a simple payback period (SPP). The proposed replacements demonstrate an efficiency improvement between 4–6%, with estimated energy savings of 177,569 kWh/year and associated annual cost savings exceeding ₹9 lakh. CO₂ emission reduction of approximately 146 metric tons/year is projected based on national grid emission factors. The results indicate that transition to IE4 motors is technically feasible, economically justifiable, and environmentally beneficial, particularly in high-duty-cycle systems such as thermal power plant auxiliaries. |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18106520 |
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| publishDate | 2025 |
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| spellingShingle | Energy-Efficient Motor Retrofit Analysis in a Thermal Power Plant: A Case Study Sandeep Singh Dr. Sarbjeet Kaur Bath Energy-efficient motors IE1 motors IE4 motors Thermal power plant Simple payback period (SPP) COâ'' emissions Motor retrofitting This paper presents energy-efficient motors' retrofit analysis for low-tension (LT) auxiliary motors at the Lehra Mohabbat Thermal Power Plant (LMTPP), Punjab, India. The study focuses on considering the replacement of aging motors of class IE1 with the class IE4 motors of ABB, in the boiler and clarifier feed pump systems. An audit of motor inventory is conducted to assess their rated powers, load factors, and operational hours. Using nameplate data and catalog values, the analysis has been done to evaluate energy and cost savings and to estimate a simple payback period (SPP). The proposed replacements demonstrate an efficiency improvement between 4–6%, with estimated energy savings of 177,569 kWh/year and associated annual cost savings exceeding ₹9 lakh. CO₂ emission reduction of approximately 146 metric tons/year is projected based on national grid emission factors. The results indicate that transition to IE4 motors is technically feasible, economically justifiable, and environmentally beneficial, particularly in high-duty-cycle systems such as thermal power plant auxiliaries. |
| title | Energy-Efficient Motor Retrofit Analysis in a Thermal Power Plant: A Case Study |
| topic | Energy-efficient motors IE1 motors IE4 motors Thermal power plant Simple payback period (SPP) COâ'' emissions Motor retrofitting |
| url | https://doi.org/10.5281/zenodo.18106520 |