Page 330 - Sustainable On-Site CHP Systems Design, Construction, and Operations

Sustaining Operational Ef ficiency of a CHP System 303

A technician checks the pump controller, finds that the operating range and calibra-
tion are not correct, and replaces the table for these variables in the control code with a
table from the manufacturer based on testing the pump in the system (before initial
firing). Upon replacing the table and waiting for the system to reach steady operation,
the CxV system reports that operation is as expected. This aspect of operation of the
CHP plant has now been corrected and verified by the CxV system.

Summary
In this chapter we provided information on why sustaining operations of CHP is impor-
tant as well as algorithms for CHP system performance monitoring and commissioning
verification (CxV), including system-level and component-level performance metrics.
We also discussed how verification of commissioning can be accomplished by com-
paring actual measured performance to benchmarks for performance provided by the
system integrator and/or component manufacturers.
The CxV scenarios also showed how the results of these comparisons can be auto-
matically interpreted by software to provide conclusions regarding whether the CHP
system and its components have been properly commissioned and where problems are
found, guidance can be provided for corrections. Application of algorithms to CHP
laboratory and field data has also been illustrated, and the chapter concludes with a
discussion on how these algorithms can be deployed. Monitoring and verification of
performance as illustrated in this chapter will become increasingly important as fuel
prices increase, CHP systems become more widely used, and concern with sustainability
of our energy systems increases.

References

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