Operation Algorithms and Computational Simulation of Physical Cooling and Heat Recovery for Indoor Space Conditioning. A Case Study for a Hydro Power Plant in Lugano, Switzerland

Dimitris Katsaprakakis, Vasilis Kagiamis, George Zidianakis and Luca Ambrosini
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Dimitris Katsaprakakis: Wind Energy and Power Plants Synthesis Laboratory, Department of Mechanical Engineering, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion Crete, Greece
Vasilis Kagiamis: Xenikakis S.A., Knossos Av. Heraklion Crete, 71409 Crete, Greece
George Zidianakis: Wind Energy and Power Plants Synthesis Laboratory, Department of Mechanical Engineering, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion Crete, Greece
Luca Ambrosini: Azienda Elettrica di Massagno (AEM) SA, 6900 Massagno, Switzerland

Sustainability, 2019, vol. 11, issue 17, 1-36

Abstract: This article presents the computational simulation process and the operation algorithms of the VAV and VRV systems, for indoor space conditioning, with extensive physical cooling and heat recovery. Through the introduction of appropriate operation algorithms, the article aims to highlight the high energy saving potential on indoor space conditioning, by exploiting physical cooling and heat recovery processes. The proposed algorithms are evaluated with a case study for a hydro power plant building located in the area of Lugano, Switzerland, with significant cooling needs for the whole year, due to high internal heat gains from indoor electrical equipment. This fact enables physical cooling during winter, for the cooling load coverage, and heat recovery, for the concurrent heating load coverage in different thermal zones of the building. Analytical operation algorithms are developed for a VAV and a VRV system. Both algorithms are computationally simulated. With the VAV system, 86.1% and 63.7% of the annual cooling and heating demand, respectively are covered by physical cooling and heat recovery. With the VRV system, 58.5% of the annual heating demand is covered by heat recovery. The set-up cost of the VAV system is almost twice higher than the set-up cost of the VRV system.

Keywords: physical cooling; heat recovery; heating and cooling of buildings; variable air volume; variable refrigerant volume; energy saving; buildings energy performance; computational simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
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