Audit of process technology is one of the most difficult to define from all audit areas, due to the multitude of different technological processes which may be encountered in companies. However, every technological process makes use of energy media, in each technological process there are control systems, as well as the systems that deliver media to the process. These are, as a part of the audit of technological processes, the sources of knowledge about possible energy savings and optimization potential.
The study includes the analysis of the potential reduction of media demand (electricity, heat, cooling water, chilled water, compressed air) by receiving units operating within process equipment. Within the scope of audit, we analyze the performance of technological machines, such as:
Possibility to implement heat and other media recovery from technological installations, including the possibility of their utilization, is analyzed and measured. Audit will point out the energy-saving technical solutions, the parameters of the recovered medium will be calculated, and the concept of its development will be presented together with the assessment of the real efficiency of the investment.
The summary of the audit includes the presentation of economic effects achieved through implemented changes, together with approximate costs of recommended implementations and savings resulting from the upgraded system operation.
|Investment||Energy savings [MWh]||White Certificates [toe]||Savings [USD/Y]||Investment costs [USD]||SPBT [Y]|
|Modernization of the compressed air system within the technological chain||1 821.880||73.946||147 916.24||170 571.43||1.2|
|Modernization of process drives||16 896.863||101.906||1 383 038.89||1 250 202.04||0.9|
|Modernization of the lighting in the area of technological process||315.417||36 466.80||36 642.29||1.0|
|Modernization of the dedusting and ventilation system||9 044.642||1 108 280.51||2 051 223.83||1.9|
|Heat recovery from machinery and process installations||82 991.092||6 563.872||3 194 183.57||4 763 617.08||1.5|
|Other||9 851.676||681 502.85||1 411 648.92||2.1|
|Total||438 679.893||91 959.584||21 370 375.72||95 747 520.98||4.5|
Overall, in consequence of the audit recommendations within the scope of technological process, DBE's clients reduced their energy consumption by approximately 438 GWh and thus achieved the average annual savings of nearly USD 22 million. The total payback period covering all investments is only 4.5 years.