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Integrated simulation of building thermal performance, HVAC system and control
Thesis (PhD)--University of Pretoria, 1997.
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| Format: | Thesis |
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University of Pretoria
2014
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| _version_ | 1867613668604116992 |
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| access_status_str | Open Access |
| author2 | Mathews, E.H. |
| author_browse | Mathews, E.H. |
| author_facet | Mathews, E.H. |
| collection | Thesis |
| dc_rights_str_mv | © 1997 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD)--University of Pretoria, 1997. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/37304 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:48.717Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/37304 Integrated simulation of building thermal performance, HVAC system and control Mathews, E.H. Van Heerden, Eugene Thermal simulation tool HVAC simulation System simulation Building modelling Energy management systems UCTD Thesis (PhD)--University of Pretoria, 1997. Practicing engineers need an integrated building, HVAC and control simulation tool for optimum HVAC design and retrofit. Various tools are available to the researchers, but these are not appropriate for the consulting engineer. To provide the engineer with a tool which can be used for typical HVAC projects, new models for building, HVAC and control simulation are introduced and integrated in a user-friendly, quick-to-use tool. The new thermal model for buildings is based on a transfer matrix description of the heat transfer through the building shell. It makes provision for the various heat flow paths that make up the overall heat flow through the building structure. The model has been extensively verified with one hundred and three case studies. These case studies were conducted on a variety of buildings, ranging from a 4m2 bathroom, to a 7755 m2 factory building. Eight of the case studies were conducted independently in the Negev Desert in Israel. The thermal model is also used in a program that was custom-made for the AGREMENT Board (certification board for the thermal performance of new low-cost housing projects). Extensions to the standard tool were introduced to predict the potential for condensation on the various surfaces. Standard user patterns were incorporated in the program so that all the buildings are evaluated on the same basis. In the second part of this study the implementation of integrated simulation is discussed. A solution algorithm, based on the Tarjan depth first-search algorithm, was implemented. This ensures that the minimum number of variables are identified. A quasi-Newton solution algorithm is used to solve the resultant simultaneous equations. Various extensions to the HVAC and control models and simulation originally suggested by Rousseau [1] were implemented. Firstly, the steady-state models were extended by using a simplified time-constant approach to emulate the dynamic response of the equipment. Secondly, a C02 model for the building zone was implemented. Thirdly, the partload performance of particular equipment was implemented. Further extensions to the simulation tool were implemented so that energy management strategies could be simulated. A detailed discussion of the implications of the energy management systems was given and the benefits of using these strategies were clearly illustrated, in this study. Finally, the simulation tool was verified by three case studies. The buildings used for the verification ranged from a five-storeyed office and laboratory building, to a domestic dwelling. The energy consumption and the dynamics of the HVAC systems could be predicted sufficiently accurately to warrant the use of the tool for future building retrofit studies gm2014 Mechanical and Aeronautical Engineering unrestricted 2014-04-01T09:11:41Z 2014-04-01T09:11:41Z 1997-06-02 1997 Thesis Van Heerden, E 1997, Integrated simulation of building thermal performance, HVAC system and control, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/37304> D14/4/26/gm http://hdl.handle.net/2263/37304 © 1997 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Thermal simulation tool HVAC simulation System simulation Building modelling Energy management systems UCTD Integrated simulation of building thermal performance, HVAC system and control |
| title | Integrated simulation of building thermal performance, HVAC system and control |
| title_full | Integrated simulation of building thermal performance, HVAC system and control |
| title_fullStr | Integrated simulation of building thermal performance, HVAC system and control |
| title_full_unstemmed | Integrated simulation of building thermal performance, HVAC system and control |
| title_short | Integrated simulation of building thermal performance, HVAC system and control |
| title_sort | integrated simulation of building thermal performance hvac system and control |
| topic | Thermal simulation tool HVAC simulation System simulation Building modelling Energy management systems UCTD |
| url | http://hdl.handle.net/2263/37304 |