Energy-Saving Retrofit of Shanxi Senze's 12MW Back-Pressure Unit #2, an EPC Project, Passes Final Acceptance

On December 3, 2025, the energy-saving acceptance was successfully passed for the Energy Performance Contracting (EPC) project—the 12MW Back-Pressure Energy Efficiency Retrofit of Unit #2 at Shanxi Senze Coal & Aluminum Group. This project was fully invested in and implemented by our company under the EPC model. Since its one-time successful startup and grid connection on November 11, 2025, all operational parameters have remained normal and stable. This project represents the third successful energy-saving retrofit collaboration between the two companies, building upon the previous completions of the EPC projects for Unit #1 and Unit #3. We hereby express our warm congratulations.

The original unit operated under the following conditions: a rated steam flow of 90 t/h, inlet steam pressure of 8.83 MPa, temperature of 535°C, and back-pressure exhaust steam at 0.785 MPa. With an installed capacity of 12 MW and a maximum output of 15 MW, it was a highly energy-intensive unit. It suffered from severe steam leakage through both front and rear gland seals, poor flow path efficiency, and low internal efficiency, resulting in a high specific steam consumption. Furthermore, its startup time exceeded ten hours, rendering it highly uneconomical and inefficient in operation.

Following the complete replacement of the original energy-intensive unit with our company's high-efficiency model, the unit's energy performance has improved significantly, with startup time reduced to under four hours. A comparative analysis by both partners under equivalent pre- and post-retrofit conditions confirmed remarkable energy savings. The project has now successfully passed the energy-saving acceptance test.Under rated operating conditions, the measured energy efficiency improvement reached 28.7%, saving 3,700 kW/h of electricity. When operating under a stable long-term load of 14 MW, energy savings exceed 4,000 kW/h. Both the energy conservation and economic benefits have far surpassed initial expectations.

The successful completion of this project and its remarkable energy-saving results have once again earned high praise from the client, demonstrating our company’s strong execution capabilities and commitment to integrity in service. This achievement stands as another benchmark success for our company.

We hereby express our sincere gratitude to the client and all participating partner organizations. At the same time, we warmly welcome potential energy-consuming enterprises to visit our site for inspection, guidance and exchange, aiming for mutual benefit and win-win cooperation.