Abstract
The performance of a hybrid cooling system that combines a screw water chiller with a ground source heat pump (GSHP) was measured and analyzed at various cooling loads. In addition, the hybrid cooling system in a building was modelled sophisticatedly using EnergyPlus and then validated with the measured data. The coefficient of performance of the GSHP was lower than that of a conventional chiller in the monitored building, but the hybrid cooling system helped to stably provide the required cooling capacity at high-load conditions. The mean bias error and the normalized root-mean squared error of the predicted cooling load of the building were -8% and 12.4%, respectively. The hybrid cooling system was simulated by varying four operating parameters: the operating schedule, chilled water temperature (TCW), dry-bulb temperature (TDB), and entering water temperature (TEW). The TCW is ascertained as being the most effective control parameter in the hybrid cooling system.
Original language | English |
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Pages (from-to) | 2006-2012 |
Number of pages | 7 |
Journal | Energy |
Volume | 35 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2010 May |
Keywords
- Ground source heat pump (GSHP)
- HVAC system
- Modeling
- Screw water chiller
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Pollution
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering