Based on field measurement data, the air-conditioning system consumes more than 40% of the building total energy use, followed by 30% of lighting, and 30% of miscellaneous pumping systems.. Among them, 60% power was consumed by chiller plants, while the chilled water pumping and air side equipment each accounts for another 20%. It is no doubt, that the energy efficiency improvement of chillers is one of the most important items in building energy conservation.
It is common practice to design an air-conditioning system based on peak cooling load, namely, peak cooling demand on August 17, 3 p.m. Therefore, the chillers were mostly over-sized, while most of the time the chiller plant is operating under partial load conditions (PLF), which consumes more energy resulting in higher kw/RT and lower COP.
It is the goal of this project to develop intelligent operation strategies of chiller plants under various seasonal conditions and to validate the effectiveness by full-scale experiment.
At first, a typical central air-conditioning system will be selected and operated under various PLF conditions with the supply and return chilled water and flow rates recorded for energy calculations. By applying the simulation procedure developed by the ASHRAE using regression technique, the performance curve of a specific chiller under various PLF can be obtained with the kw/RT value identified.
By simulating the multiple chiller cooperating combinations, an optimal operation strategy can be developed with the best economic benefits. Through the execution of this project, such an operation strategy, developed and validated under local weather conditions warrants good potential for engineering applications
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0616104-103745 |
| Date | 16 June 2004 |
| Creators | HSU, PEI-CHUN |
| Contributors | none, none, none |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616104-103745 |
| Rights | unrestricted, Copyright information available at source archive |
Page generated in 0.0018 seconds