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Scheduling of Multiple Chillers in Trigeneration Plants

Author

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  • Chris Underwood

    (Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK)

  • Bobo Ng

    (Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK)

  • Francis Yik

    (Atal Engineering Ltd, North Point, Hong Kong SAR, China)

Abstract

The scheduling of both absorption cycle and vapour compression cycle chillers in trigeneration plants is investigated in this work. Many trigeneration plants use absorption cycle chillers only but there are potential performance advantages to be gained by using a combination of absorption and compression chillers especially in situations where the building electrical demand to be met by the combined heat and power (CHP) plant is variable. Simulation models of both types of chillers are developed together with a simple model of a variable-capacity CHP engine developed by curve-fitting to supplier’s data. The models are linked to form an optimisation problem in which the contribution of both chiller types is determined at a maximum value of operating cost (or carbon emission) saving. Results show that an optimum operating condition arises at moderately high air conditioning demands and moderately low power demand when the air conditioning demand is shared between both chillers, all recovered heat is utilised, and the contribution arising from the compression chiller results in an increase in CHP power generation and, hence, engine efficiency.

Suggested Citation

  • Chris Underwood & Bobo Ng & Francis Yik, 2015. "Scheduling of Multiple Chillers in Trigeneration Plants," Energies, MDPI, vol. 8(10), pages 1-25, October.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:10:p:11095-11119:d:56801
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    References listed on IDEAS

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    Cited by:

    1. Benedetto Conte & Joan Carles Bruno & Alberto Coronas, 2016. "Optimal Cooling Load Sharing Strategies for Different Types of Absorption Chillers in Trigeneration Plants," Energies, MDPI, vol. 9(8), pages 1-16, July.
    2. Akhtar Hussain & Van-Hai Bui & Hak-Man Kim & Yong-Hoon Im & Jae-Yong Lee, 2017. "Optimal Energy Management of Combined Cooling, Heat and Power in Different Demand Type Buildings Considering Seasonal Demand Variations," Energies, MDPI, vol. 10(6), pages 1-21, June.
    3. Ryszard Bartnik & Zbigniew Buryn & Anna Hnydiuk-Stefan & Waldemar Skomudek & Aleksandra Otawa, 2020. "Thermodynamic and Economic Analysis of Trigeneration System Comprising a Hierarchical Gas-Gas Engine for Production of Electricity, Heat and Cold," Energies, MDPI, vol. 13(4), pages 1-33, February.

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