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The 9th International Energy Conference
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:: Volume 19, Issue 2 (7-2016) ::
IJE 2016, 19(2): 0-0 Back to browse issues page
Modeling and life-cycle cost analysis for secondary HVAC systems
Yaser Kialashaki * , Sorena Sattari
Sharif University of Technology , yaserkia@yahoo.com
Abstract:   (3099 Views)

HVAC systems and associated equipment consume a relatively large fraction of total building energy consumption, a significant portion of which is attributed to fan operation. The operation of dampers when installed can cause low energy consumption in supply and/or return fans if they are functioning in proper and optimal manner. In this study, mathematical experessions of individual components of HVAC systems are presented to model secondary HVAC systems based on the knowledge of the underlying physical phenomenon. A life-cycle cost analysis using detailed system modeling and initial and operating costs is applied to evaluate the economic feasibilities of constant air volume (CAV) and variable air volume (VAV) air conditioning systems. Several factors such as the building locations, system characteristics, resistance in the duct and dampers, supply air temperature, damper control, and minimum ventilation requirements are also considered during the evaluations. The results show that the way of the dampers been controlled has a significant effect on fan performance and its energy use. The VAV strategy if properly implemented can provide fan energy saving about 13%. It is found that payback period of VAV is suitable particularly by considering cooling and heating system altogether.

Keywords: HVAC system, modeling, life cycle cost analysis, fan performance, damper control
Full-Text [PDF 618 kb]   (1230 Downloads)    
Type of Study: Research | Subject: Energy Management, Conservation and Rational Use of Energy
Received: 2015/04/24 | Accepted: 2015/06/30 | Published: 2016/10/26
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kialashaki Y, sattari S. Modeling and life-cycle cost analysis for secondary HVAC systems. IJE 2016; 19 (2)
URL: http://necjournals.ir/article-1-854-en.html


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Volume 19, Issue 2 (7-2016) Back to browse issues page
نشریه انرژی ایران Iranian Journal of Energy
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