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 The Impact of Aspect Ratio on External Heat Gain of Multi-storey Office Buildings in Jakarta

2018 ◽  
Vol 16 (1) ◽  
pp. 24-31
Author(s):  
Wasiska Iyati ◽  
◽  
Eryani Nurma Yulita ◽  
Jusuf Thojib ◽  
Heru Sufianto ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Building Design ◽  
Climatic Conditions ◽  
Building Envelope ◽  
External Heat ◽  
Office Buildings ◽  
Office Building ◽  
Cooling Load ◽  
Heat Gain ◽  
The Impact

The narrow land in big cities such as Jakarta, increases the amount of high rise building, especially multi-storey office building. Office building consumes much energy to provide air conditioning to meet the thermal comfort inside the building. On the other hand, the building shape, building envelope, and building orientation to the sun's position are the main factors in building design aspects that affect the amount of cooling load. This study aims to investigate the impact of the aspect ratio or the ratio of the longer dimension of an oblong plan to the shorter, on external heat gain of multi-storey office building. Variables examined include the transparent and solid area of building envelope, the total area of the surface of the building envelope in any orientation, and the volume of the building, as well as the influence of those proportion on the external heat gain. This study uses mathematical calculations to predict the cooling load of the building, particularly external heat gain through the walls, roof and glass, as well as comparative analysis of models studied. The study also aims to generate the design criteria of building form and proportion of multi-storey office buildings envelope with lower external heat gain. In Jakarta climatic conditions, the result on rectangular building plan with aspect ratio of 1 to 4 shows that the external heat gain did not differ significantly, and the smallest heat gain is found on the aspect ratio of 1.8. Results also showed that the greater aspect ratio, the greater reduction of external heat gain obtained by changing the orientation of the longest side facing east-west into the north-south, about 2.79% up to 42.14% on the aspect ratio of 1.1 to 4. In addition, it is known that in same building volume, changing the number of floors from 10 to 50 can improve the external heat gain almost twice.

scholarly journals Implementation of Energy Management Concept and Energy Management System in High Rise Office Building

2019 ◽  
Vol 16 (3) ◽  
pp. 85
Author(s):  
Marsul Siregar ◽  
Firma Purbantoro ◽  
Tajuddin Nur
Keyword(s):  
Energy Efficiency ◽  
Energy Management ◽  
Water Consumption ◽  
Management System ◽  
Green Building ◽  
Efficiency Index ◽  
Office Buildings ◽  
Office Building ◽  
Consumption Index ◽  
Management Concept

Energy Management Concept as part of Green Building Concept is focused to Improve Energy Efficiency Index (EEI) and Water Consumption Index (WCI). The Implementation Energy Management Concept in an office buildings of this study based on the management system model of continual improvement ISO 50001:2011. The purpose of this study was to determine the extent to which the implementation of green building principles in Office Buildings. This study took the case study in an office building in Jakarta Indonesia that has two towers, each tower has 32 floors and 3 basement floors. The method used is descriptive with respect to GREENSHIP Rating Tools for existing building which consists of six categories; Appropriate Site Development (ASD), Energy Efficiency & Conservation (EEC), Water Conservation (WAC), Material Resources & Cycle (MRC), Indoor Air Health & Comfort (IHC) and Building & Environments Management (BEM). The results show that implementation the Energy Management Concept could also made energy performance more efficient, after Implementing through Retrofitting of the Chiller System, Recycle Waste Water, Replacement of Conventional lamp to Energy Saving LED and also Training and Education to all employees and tenants. From comparing data research before implementation of Energy Management Concept in 2014 and after Implementation and retrofitting in 2016, 2017 & 2018, it is found that Energy Efficiency Index (EEI) from 238.8 kwh/m2/Years to 134,04kwh/m2/Year and Water Consumption Index (WCI)From 50 liter/person/Day to 27.18 Liter/person/Day. And the saving cost from electricity bill payments is IDR. 466,803,325.67 / month (18%) and roughly will Break Event Point (BEP) for 3.86 Years

Interpretation of Concerning Comfort of Office Building Design in Cold Regions

2014 ◽  
Vol 507 ◽  
pp. 92-96
Author(s):  
Yao Fu ◽  
Ying Zhang
Keyword(s):  
Architectural Design ◽  
Building Design ◽  
Building Envelope ◽  
Office Buildings ◽  
Office Building ◽  
Cold Region ◽  
Cold Regions ◽  
Building Orientation ◽  
Air Supply

Abstract:This paper interpreted the comfort of office buildings in cold regions in the view of architecture. To make the architect to build a people-centered thinking in architectural design; The analysis of design start discussions from the relation between comfort and architectural design, through building orientation, building envelope structure, indoor fresh air supply and other elements to put forward designing direction in cold region office building .

IMPACT OF RETROFITTING ENERGY-EFFICIENT DESIGN STRATEGIES ON ENERGY USE OF EXISTING COMMERCIAL BUILDINGS: COMPARATIVE STUDY OF LOW-IMPACT AND DEEP RETROFIT STRATEGIES

2017 ◽  
Vol 12 (4) ◽  
pp. 70-88 ◽  
Author(s):  
Ajla Aksamija
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Hvac Systems ◽  
Building Envelope ◽  
Energy Modeling ◽  
Office Buildings ◽  
Existing Buildings ◽  
Design Strategies ◽  
Energy Usage ◽  
Building Systems

This article discusses energy-efficient retrofitting design strategies for commercial office buildings, and examines their effect on energy consumption. The objective of the research was to study how to integrate passive design strategies and energy-efficient building systems to improve building performance, and reduce the energy consumption of existing buildings in three different climate types (cold, mixed and hot climates). First, properties of existing buildings were analyzed based on national CBECS database to determine typical characteristics of office buildings located in Chicago, Baltimore and Phoenix, including size, building envelope treatment and building systems. Then, fourteen different prototypes were developed, varying the building shape and orientation to represent different building stock, and energy modeling was conducted to establish energy usage baseline. Multiple design considerations were investigated based on extensive energy simulations and modeling, where low-impact and deep retrofits were considered. Low-impact strategies included improvements to the building envelope, lighting systems and optimization of HVAC systems operation (without upgrading heating and cooling equipment). Deep energy retrofits also included improvements to building envelope and lighting, and considered changes and improvements to HVAC systems (specifically, integration of radiant systems). Energy modeling was conducted for all prototypes, and results were obtained for the baseline (current energy usage), and energy usage considering low-impact design strategies and deep retrofits. A total of 126 energy models was developed, simulated and analyzed, providing a dataset that captured energy usage for investigated scenarios. The comparative analysis of simulation results was used to determine how specific techniques lead to energy savings in different climate types, as well as for buildings of various shapes and orientations.

scholarly journals Using Residential and Office Building Archetypes for Energy Efficiency Building Solutions in an Urban Scale: A China Case Study

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3210 ◽  
Author(s):  
Chao Ding ◽  
Nan Zhou
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Power Density ◽  
Building Design ◽  
Building Energy ◽  
Building Envelope ◽  
Stochastic Simulations ◽  
Office Building ◽  
Design Parameters ◽  
Building Energy Consumption

Building energy consumption accounts for 36% of the overall energy end use worldwide and is growing rapidly as developing countries continue to urbanize. Understanding the energy use at urban scale will lay the foundation for identification of energy efficiency opportunities to be deployed at speed. China has almost half of global new constructions and plays an important role in building suitability. However, an open source national building energy consumption database is not available in China. To provide data support for building energy consumptions, this paper used a simulation method to develop an urban building energy consumption database for a pilot city in Wuhan, China. First, residential, small, and large office building archetype energy models were created in EnergyPlus to represent typical building energy consumption in Wuhan. The baseline reference model simulation results were further validated using survey data from the literature. Second, stochastic simulations were conducted to consider different design parameters and occupants’ energy usage intensity scenarios, such as thermal properties of the building envelope, lighting power density, equipment power density, HVAC (heating, ventilation and air conditioning) schedule, etc. A building energy consumption database was generated for typical building archetypes. Third, data-driven regression analysis was conducted to support quick building energy consumption prediction using key high- level building information inputs. Finally, a web-based urban energy platform and an interface were developed to support further third-party application development. The research is expected to provide fast energy efficiency building design solutions for urban planning, new constructions as well as building retrofits.

scholarly journals The Danger Of Unsubstantiated Assumptions - Indoor Air Quality

1997 ◽  
Vol 14 (1) ◽  
Author(s):  
Edward W. Saltzberg
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Brain Damage ◽  
Indoor Air ◽  
Building Construction ◽  
Office Buildings ◽  
Office Building ◽  
Television Station ◽  
Industrial Hygienist

This Particular Case Revolved Around An Incident In An Art Department At A Large Television Station. The Plaintiff Contended That Her Exposure To Harmful Chemicals In The Art Department Had Caused Her Serious Brain Damage And Was Suing For A Significant Amount From All Of The Manufacturers Of The Products Used In The Art Department. The Author Represented Just One Of The Manufacturers Of A Product. The Plaintiffs Expert, An Industrial Hygienist, Had Contended That The Plaintiff Had Been Exposed To Considerably Greater Levels Of Toxicity Than Permitted Under The Osha Or Niosh Regulations. He Even Provided Copious Calculations Substantiating His Allegations. However, The Plaintiffs Expert Had Based All Of His Calculations On The Assumption That The Art Department Had Been Typical Office Building Construction And, Therefore, He Assumed In Typical Office Buildings The Outside Air Provided To The Occupied Space Was Approximately Five Cfm Per Person. The Plaintiffs Expert Also Contended That The Air Was Returned And Recirculated. Furthermore, Plaintiffs Expert Contended That The Air Delivery Could Not Be More Than What He Had Assumed Because Air At Greater Than 35 Fpm Velocity Will Blow Papers Off The Desks. All Of His Calculations Were Based On These Critical Assumptions.

Energy efficiency practices for Malaysian green office building occupants

2018 ◽  
Vol 8 (2) ◽  
pp. 134-146 ◽  
Author(s):  
Chukwuka Christian Ohueri ◽  
Wallace Imoudu Enegbuma ◽  
Russell Kenley
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Building Materials ◽  
Office Buildings ◽  
Strategy Training ◽  
Office Building ◽  
Performance Gap ◽  
Content Type ◽  
Behavioural Strategy ◽  
Reduce Energy Consumption

Purpose Green building construction was adopted as a strategy to reduce energy consumption and the overall impact of the built environment on our natural environment. However, in Malaysia, previous studies have reaffirmed that green office buildings consume a substantial amount of energy, compared to their counterparts in Singapore. Moreover, there is still a significant performance gap between predicted energy measurements and actual operational energy consumption of green office buildings in Malaysia, due to occupants’ behavioural discrepancies. Therefore, the purpose of this paper is to develop energy efficiency practices for occupants of green office buildings in Malaysia. The developed practices integrate technology, organisation policy, and occupants’ behavioural strategies, in order to reduce the energy consumption of green office buildings in Malaysia. Design/methodology/approach To achieve the research goal, a mixed (quantitative and qualitative) research method was used to collect data from the research population. In total, 53 respondents working in a green office building complex in Kuala Lumpur Malaysia were surveyed using a questionnaire. Additionally, three top management staff of the green office building and two Malaysian construction professionals were interviewed. The study adopted convenience sampling technique in selecting the research respondents. The data from the questionnaire were analysed using SPSS software (version 22) while the interview data were analysed via thematic content analysis. Findings The findings suggest that the integration of technological strategy (use of BIM tools, sustainable building materials, etc.); organisational strategy (develop, implement and evaluate action plans, use of monitor/control systems, etc.); and occupants behavioural strategy (training, incentives, occupants energy efficiency guide, etc.) will critically reduce energy consumption of green office buildings in Malaysia. Originality/value Based on the findings, energy efficiency practices are developed to guide occupants in reducing the energy consumption of green office buildings in Malaysia. This strategy will contribute to reducing the performance gap that exists between predicted energy and actual energy use of green office buildings in Malaysia. However, the developed energy efficiency practices need to be validated to ascertain its workability in the green office building context.

Facility performance evaluation to develop heating, ventilation, and air-conditioning system design and operation strategies for an office building in Mongolia

2016 ◽  
Vol 25 (8) ◽  
pp. 1209-1225
Author(s):  
Kyu-Nam Rhee
Keyword(s):  
Energy Efficiency ◽  
Performance Evaluation ◽  
Indoor Air ◽  
Air Conditioning ◽  
Office Building ◽  
Indoor Environmental Quality ◽  
Hvac System ◽  
Air Conditioning System ◽  
The Poor ◽  
Low Humidity

A facility performance evaluation (FPE) study was applied to an occupied office building in Mongolia that would be replaced by a new building. The purpose was to identify indoor environmental quality (IEQ) problems and possible solutions in the current building to inform the design and operation of the heating, ventilation, and air-conditioning (HVAC) system for the new building. The results show that the IEQ of the current building was poor due to high temperature, very low humidity and high CO2 concentration, and that the poor thermal uniformity and indoor air quality had caused the occupants’ discomfort. Opening windows by the occupants in winter was one of the problems that affected the thermal comfort and the energy efficiency of the building. Based on the findings of the FPE, this study recommended the design and operation strategies of the HVAC system for the new building to improve its IEQ.

Sign in / Sign up

Export Citation Format

Share Document