ASHRAE 90290-2003 System Performance Evaluation and Design Guidelines for Displacement Ventilation《为置换通风的系统的性能评估和设计指导方针》.pdf
《ASHRAE 90290-2003 System Performance Evaluation and Design Guidelines for Displacement Ventilation《为置换通风的系统的性能评估和设计指导方针》.pdf》由会员分享,可在线阅读,更多相关《ASHRAE 90290-2003 System Performance Evaluation and Design Guidelines for Displacement Ventilation《为置换通风的系统的性能评估和设计指导方针》.pdf(140页珍藏版)》请在麦多课文档分享上搜索。
1、System Performance Evaluationand Design Guidelines forDisplacement VentilationAbout the AuthorsQingyan (Yan) Chen is a professor of mechanical engineering at Ray W. HerrickLaboratories, Purdue University, West Lafayette, Indiana. He received his B.Sc. degreefrom Tsinghua University and M.Sc. and Ph.
2、D. degrees from Delft University of Tech-nology. He has published over 80 archival journal papers and more than 60 conferencepapers. Since 1995, he has been the principal investigator or co-principal investigatorof 30 sponsored research projects, including five from ASHRAE. He has been electedto the
3、 International Academy of Indoor Air Sciences. Currently, Prof. Chen serves asan associate editor for the International Journal of HVAC nor may any part of this book be reproduced,stored in a retrieval system, or transmitted in any way or by any meanselectronic,photocopying, recording, or otherwitho
4、ut permission in writing from ASHRAE.ASHRAE STAFFSPECIAL PUBLICATIONSMildred GeshwilerEditorErin HowardAssistant EditorChristina HelmsAssistant EditorMichshell PhillipsSecretaryPUBLISHING SERVICESBarry KurianManagerJayne JacksonProduction AssistantPUBLISHERW. Stephen ComstockvContentsPREFACE . . . .
5、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viiACKNOWLEDGMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ixCHAPTER 1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6、. .11.1 Displacement Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21.2 Special Features in U.S. Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.3 Objective of This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
7、CHAPTER 2LITERATURE REVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72.1 Temperature Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72.2 Flow Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142.3 Co
8、ntaminant Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212.4 Comfort Aspects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262.5 Energy and Cost Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292.6 Des
9、ign Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33CHAPTER 3EXPERIMENTAL STUDY ANDVALIDATION OF CFD PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353.1 Experimental Facility. . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、 . . . . . . . . . .363.2 Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393.3 Experimental Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .423.4 Computational Fluid Dynamics Model . . . . . . . . . . . . . . . .
11、 . . . . . . . .423.5 Validation of CFD Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .453.6 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52CHAPTER 4MODELS FOR PREDICTION OF TEMPERATUREDIFFERENCE AND VENTILATION EFFECT
12、IVENESS . . . . . . . . . . . . . . . . .554.1 A Database of Displacement Ventilation. . . . . . . . . . . . . . . . . . . . . . .564.2 Model of the Air Temperature DifferenceBetween the Head and Foot Level . . . . . . . . . . . . . . . . . . . . . . . . . . . .704.3 Ventilation Effectiveness Model
13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . .774.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79System Performance Evaluation and Design Guidelines for Displacement VentilationviCHAPTER 5PERFORMANCES EVALUATIONOF DISPLACEMENT VENT
14、ILATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 815.1 Evaluation Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 815.2 Performance Evaluation of Displacement Ventilation . . . . . . . . . . . . 845.3 Discussion . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94CHAPTER 6ENERGY AND COST ANALYSIS . . . . . . . . . . . . . . . . . . . . . 956.1 Load Calculations. . . . . . . . . . . . . . . .
16、. . . . . . . . . . . . . . . . . . . . . . . . 956.2 Secondary Systems and Plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1006.3 Energy Analysis for U.S. Conditions . . . . . . . . . . . . . . . . . . . . . . . . 1006.4 First Cost Analysis for U.S. Conditions. . . . . . . . . . .
17、. . . . . . . . . . . 1066.5 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107CHAPTER 7DESIGN GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111CHAPTER 8CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . 117NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . 127viiPrefaceThis book presents system performance evaluation and design guidelines fordisplacement ventilation. The authors first reviewed the literature concerning the performance of tradi-tional displacement ventilation. Since U.S. buildings have dif
20、ferent layouts andlarger internal heat gains than those studied in the literature, it was necessary todevelop design guidelines for displacement ventilation for U.S. buildings underdifferent climatic conditions.The design guidelines present two important models that were not available inthe literatu
21、re: a model to calculate the temperature difference between the head andfoot level of an occupant and a model to determine the ventilation effectiveness atthe breathing level. The investigation developed the models from the results of 56cases of displacement ventilation obtained by a computational f
22、luid dynamics(CFD) program. Those cases include a wide range of thermal and flow conditionssimilar to those found in U.S. offices, classrooms, and workshops. The CFDprogram was validated by six sets of detailed experimental data obtained from a full-scale environmental chamber simulating a small off
23、ice, a quarter of a large officewith partition, and a quarter of a classroom. The data include airflow patterns anddistribution of air velocity, temperature, contaminant concentration, and turbulence.The validation also used some data obtained from the literature. The CFD programwas also used to ass
24、ess the performance of displacement ventilation, such as airflowpattern and distributions of air temperature, percentage dissatisfied due to draft,predicted percentage dissatisfied, contaminant concentration, mean age of air, andventilation effectiveness. The investigation also conducted energy and
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASHRAE902902003SYSTEMPERFORMANCEEVALUATIONANDDESIGNGUIDELINESFORDISPLACEMENTVENTILATION 置换 通风 系统 性能 评估

链接地址:http://www.mydoc123.com/p-454439.html