A Simulation Assessment of Performance of Different HVAC Systems in an Office Building

2010 ◽  
Author(s):  
M. Bojic ◽  
N. Nikolic ◽  
M. Despotovic
Keyword(s):  
Hvac Systems ◽  
Office Building ◽  
Assessment Of Performance

scholarly journals Detailed Assessment of Embodied Carbon of HVAC Systems for a New Office Building Based on BIM

2020 ◽  
Vol 12 (8) ◽  
pp. 3372 ◽  
Author(s):  
Christina Kiamili ◽  
Alexander Hollberg ◽  
Guillaume Habert
Keyword(s):  
Environmental Impact ◽  
Hvac Systems ◽  
Visual Programming ◽  
Office Building ◽  
Building Sector ◽  
Carbon Reduction ◽  
Embodied Carbon ◽  
Building Information ◽  
Detailed Assessment ◽  
Visual Programming Language

The global shift towards embodied carbon reduction in the building sector has indicated the need for a detailed analysis of environmental impacts across the whole lifecycle of buildings. The environmental impact of heating, ventilation, and air conditioning (HVAC) systems has rarely been studied in detail. Most of the published studies are based on assumptions and rule of thumb techniques. In this study, the requirements and methods to perform a detailed life cycle assessment (LCA) for HVAC systems based on building information modelling (BIM) are assessed and framed for the first time. The approach of linking external product data information to objects using visual programming language (VPL) is tested, and its benefits over the existing workflows are presented. The detailed BIM model of a newly built office building in Switzerland is used as a case study. In addition, detailed project documentation is used to ensure the plausibility of the calculated impact. The LCA results show that the embodied impact of the HVAC systems is three times higher than the targets provided by the Swiss Energy Efficiency Path (SIA 2040). Furthermore, it is shown that the embodied impact of HVAC systems lies in the range of 15–36% of the total embodied impact of office buildings. Nevertheless, further research and similar case studies are needed to provide a robust picture of the embodied environmental impact of HVAC systems. The results could contribute to setting stricter targets in line with the vision of decarbonization of the building sector.

A simulation appraisal of performance of different HVAC systems in an office building

2011 ◽  
Vol 43 (6) ◽  
pp. 1207-1215 ◽  
Author(s):  
Milorad Bojić ◽  
Novak Nikolić ◽  
Danijela Nikolić ◽  
Jasmina Skerlić ◽  
Ivan Miletić
Keyword(s):  
Hvac Systems ◽  
Office Building

scholarly journals Cost Control Methods for Efficient HVAC in Office Building

2019 ◽  
Vol 9 (2S2) ◽  
pp. 511-515
Keyword(s):  
Energy Efficiency ◽  
Indoor Air ◽  
Energy Cost ◽  
Sustainable Design ◽  
Hvac Systems ◽  
Building Envelope ◽  
Office Buildings ◽  
Office Building ◽  
Control Methods ◽  
Wall Construction

Achieving Energy Efficiency in Office Buildings plays a key role in reducing the Environmental Impact of Buildings to a larger extent. The Users in the workplace are often affected by the improper design of HVAC systems. In most of the office buildings the Indoor Environmental conditions were not designed, controlled and maintained which in turn increases the Energy cost of the buildings. Sustainable Design of HVAC Systems includes all the mechanical equipments that efficiently controls, monitors and supplies the Indoor Air. The objective of this paper is to (i) Do a comparative study and analyses the various building Envelope in office buildings for reducing the Energy Cost in designing HVAC systems in Office buildings using Ecotect Modelling.(ii) To compare the Energy cost of Water Cooled Screw Chillers and VRF Systems. The above experimentation was held in ELCOT S office building in salem. The findings of this paper revealed that usage of Porotherm wall construction along with VRF SYSTEMS in office buildings found to be effective in achieving sustainable HVAC design.

scholarly journals Performance Diagnosis and Energy-Saving Optimization of the Heat Recovery Unit in An Office Building in Sichuan

2019 ◽  
Vol 136 ◽  
pp. 01047
Author(s):  
Baowei Xu ◽  
Nan Li ◽  
Xinghua Li
Keyword(s):  
Energy Saving ◽  
Air Temperature ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Sichuan Province ◽  
Office Building ◽  
Working Capacity ◽  
Public Buildings ◽  
Performance Diagnosis ◽  
Recovery Unit

In recent years, the number and volume of public buildings have been increasing sharply, which has led to an increase in the working capacity of HVAC systems in public buildings. This paper analyzes and tests a heat recovery unit in an office building in Sichuan Province, China. The fresh air input temperature, the fresh air output temperature and the exhaust air temperature of the heat recovery unit in January in 2018 are analyzed. The positive and negative benefits are calculated, and thus the energy saved by the system during the test is obtained.

scholarly journals Modelling challenges of a heat recovery VRF system in a cold climate using a sustainable office case study building

2021 ◽  
Author(s):  
Cassandra Kani-Sanchez
Keyword(s):  
Model Calibration ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Cold Climate ◽  
Office Building ◽  
System Model ◽  
System Efficiency ◽  
Climate Variations ◽  
Terminal Unit

There is a need to better understand the performance characteristics of HR VRF systems in a cold climate. This study involved the development of a HR VRF system model in EnergyPlus, using field data from a two-storey case study office building. Using the model, this study investigated calibration with site information, climate variations, VRF indoor terminal unit reconfiguration for heat recovery improvements, right-sizing HR VRF outdoor units to raise part-load ratios, and comparing the HR VRF system to other HVAC systems for system efficiency. Challenges with achieving model calibration led to recommendations for monitoring system design and EnergyPlus modelling improvements.

scholarly journals Modelling challenges of a heat recovery VRF system in a cold climate using a sustainable office case study building

2021 ◽  
Author(s):  
Cassandra Kani-Sanchez
Keyword(s):  
Model Calibration ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Cold Climate ◽  
Office Building ◽  
System Model ◽  
System Efficiency ◽  
Climate Variations ◽  
Terminal Unit

There is a need to better understand the performance characteristics of HR VRF systems in a cold climate. This study involved the development of a HR VRF system model in EnergyPlus, using field data from a two-storey case study office building. Using the model, this study investigated calibration with site information, climate variations, VRF indoor terminal unit reconfiguration for heat recovery improvements, right-sizing HR VRF outdoor units to raise part-load ratios, and comparing the HR VRF system to other HVAC systems for system efficiency. Challenges with achieving model calibration led to recommendations for monitoring system design and EnergyPlus modelling improvements.

Hepatocyte Alterations in Guinea Pigs FED Polychlorinated Biphenyls (PCBs), Dibenzodioxins (PCDD), AND DIBENZOFURANS (PCDF)

1982 ◽  
Vol 40 ◽  
pp. 56-57
Author(s):  
J. N. Turner ◽  
D. N. Collins
Keyword(s):  
Guinea Pigs ◽  
Room Temperature ◽  
Dose Group ◽  
Methyl Cellulose ◽  
Uranyl Acetate ◽  
Target Organ ◽  
Office Building ◽  
Lead Citrate ◽  
Control Groups ◽  
Cooling Fluid

A fire involving an electric service transformer and its cooling fluid, a mixture of PCBs and chlorinated benzenes, contaminated an office building with a fine soot. Chemical analysis showed PCDDs and PCDFs including the highly toxic tetra isomers. Guinea pigs were chosen as an experimental animal to test the soot's toxicity because of their sensitivity to these compounds, and the liver was examined because it is a target organ. The soot was suspended in 0.75% methyl cellulose and administered in a single dose by gavage at levels of 1,10,100, and 500mgm soot/kgm body weight. Each dose group was composed of 6 males and 6 females. Control groups included 12 (6 male, 6 female) animals fed activated carbon in methyl cellulose, 6 males fed methyl cellulose, and 16 males and 10 females untreated. The guinea pigs were sacrificed at 42 days by suffocation in CO2. Liver samples were immediately immersed and minced in 2% gluteraldehyde in cacadylate buffer at pH 7.4 and 4°C. After overnight fixation, samples were postfixed in 1% OsO4 in cacodylate for 1 hr at room temperature, embedded in epon, sectioned and stained with uranyl acetate and lead citrate.

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