| Author: | Chen, Zeyi |
| Title: | Optimizing extra-low temperature DX system |
| Advisors: | Lee, Wai Ling (BSE) |
| Degree: | M.Eng. |
| Year: | 2017 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Air conditioning Air conditioning -- Design and construction |
| Department: | Department of Building Services Engineering |
| Pages: | viii, 76 pages : color illustrations |
| Language: | English |
| Abstract: | The proposal of the extra-low temperature dedicated outdoor air system (XT-DOAS) could make fully use of the advantages of the dedicated outdoor air system (DOAS) as well as make it better applicable in the hot and humid area like Hong Kong, which could avoid the issues of the conventional air-conditioning (AC) system. This study is to optimize the XT-DOAS so as to have the best energy and thermal comfortable performance by the employment of the EnergyPlus simulation investigations. The simulations were carried out based on two equipment performance data from a pilot study and the manufacturer, and a realistic building and corresponding system characteristics. In order to optimize the system, three key variables of the system were focused, the supply air temperature (TSA), the treated outdoor air temperature (TOA) and the number of stages. It can be concluded that the optimal system configuration and setting were TOA 8°C, TSA 18°C and 2-stage which could have a relative desirable performance for both energy saving and thermal satisfaction. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991021959950203411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 2.99 MB | Adobe PDF | View/Open |
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