Abstract
This chapter experimentally tests a proposed simplified online robust control strategy for practical applications to avoid the low delta-T syndrome for chilled water systems including complex systems. On top of the conventional control strategies, a temperature set-point reset scheme is developed aiming at providing the reliable temperature set-point for enhancing the operation reliability of chilled water pumps. In addition, a flow-limiting control scheme is employed to perform the function of actively eliminating the deficit flow in the bypass line by a feedback mechanism. The site test results show that the temperature set-point given by the proposed strategy is reliable and the system temperature difference is significantly raised by eliminating the deficit flow problem. When compared to the conventional control strategies, 78% of the total chilled water pump energy was saved in the test period. The actual pump energy saving percentage could be 39% in a year after implementing the robust control strategy in the studied system.
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References
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Gao, DC. (2019). Simplified Online Robust Pump Speed Control Strategy for Practical Implementation. In: Diagnosis and Robust Control of Complex Building Central Chilling Systems for Enhanced Energy Performance. Springer, Singapore. https://doi.org/10.1007/978-981-15-0698-7_7
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DOI: https://doi.org/10.1007/978-981-15-0698-7_7
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Online ISBN: 978-981-15-0698-7
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