scholarly journals Desired points at minimum cost in the “Optimize Energy Performance” credit of leed certification

2017 ◽  
Vol 23 (6) ◽  
pp. 796-805 ◽  
Author(s):  
Emre Caner AKCAY ◽  
David ARDITI
Keyword(s):  
Energy Analysis ◽  
Minimum Cost ◽  
Energy Performance ◽  
Simulation Software ◽  
Cost Information ◽  
Leed Certification ◽  
The Cost ◽  
First Time ◽  
Economical Alternative

This paper presents a method that guides designers in obtaining the desired number of earned points in the “Optimize Energy Performance” credit of the “Energy and Atmosphere” category of LEED version 4 (v4) certification at minimum cost. The model creates different scenarios, identifies the LEED points and costs for each scenario. The energy analysis calculations are performed by Sefaira, the quantities of materials are received from Autodesk Revit, and the cost information comes from the RSMeans Database. A macro in Excel automates the process. An office building was used as a case study to illustrate the applicability of the proposed method. The minimum cost necessary to achieve any number of points in the “Optimize Energy Performance” credit were calculated, such as a minimum cost of $842,500 to obtain 16 points, and $476,684 for 5 points. The primary contributions of this research include (1) the development of a tool that allows designers to pick the most economical alternative for the desired points in the “Optimize Energy Performance” credit, and (2) the first time integrated use of an energy simulation software (Sefaira), a cost database (RSMeans), and a BIM software (Autodesk Revit)

scholarly journals Experimental Nearly Zero Energy Building with Green Technology – Renovation Pilot through Passive House Expertise

2019 ◽  
Vol 111 ◽  
pp. 03029
Author(s):  
Horia Petran ◽  
Szabolcs Varga ◽  
Noémi Fogas
Keyword(s):  
Energy Performance ◽  
Green Technology ◽  
Passive House ◽  
Existing Building ◽  
Zero Energy Building ◽  
Green Materials ◽  
Preliminary Planning ◽  
Solar House ◽  
The Cost

The paper presents the preliminary planning of a demonstration pilot for exemplary renovation of an existing building (“Solar House 1 – Campina”) towards nZEB level using Passive House principles and technologies. The “Solar House” was one of the lighthouses of solar energy developments in the ‘80s in Romania, being built in 1977-1978 in Campina (Centre-South Romania) and represented an experimental building using innovative solar technologies for DHW preparation, active and passive space heating. The decision of transforming the existing building in a demonstration pilot nZEB with green materials was taken and the feasibility study is currently underway. The pilot aims to analyse and test, the cost effectiveness of Passive House (PH) technologies integration in a deep renovation process with the view to achieve the fixed nZEB levels, as an exemplary case study demonstrating the benefits and feasibility of applying PH principles and energy performance evaluation in real context. Both approaches of applying the renovation standard EnerPHit and targeting Passive House criteria are discussed together with the nZEB targets, while the analysis of technical (energy performance) and economic (total costs) feasibility is presented. The proposed building will act as a training and consultancy centre in Campina - created as a model for achieving greater energy efficiency and environmental responsibility in Romania.

scholarly journals Economic and Technical Considerations in Pursuing Green Building Certification: A Case Study from Iran

2020 ◽  
Vol 12 (2) ◽  
pp. 719
Author(s):  
Ali Amiri ◽  
Juudit Ottelin ◽  
Jaana Sorvari ◽  
Seppo Junnila
Keyword(s):  
Raw Materials ◽  
Green Building ◽  
Modern Society ◽  
Developed Countries ◽  
Leed Certification ◽  
Western Asia ◽  
The Us ◽  
The Cost ◽  
Technical Considerations

Buildings use 30–40% of all energy resources and are thus the main consumers in modern society. Moreover, buildings require a vast amount of different raw materials. During the last two decades, several green building certifications have been created in order to consider the social, economic, and environmental aspects of the sustainability of buildings. One of the most famous and widely used of these certifications is Leadership in Energy and Environmental Design (LEED). So far, the use of LEED has concentrated in the US and other developed countries. One reason that restricts the use of this point-based system certification in developing countries is the limited data about its costs. In this study, the extra cost of the certification process were evaluated, besides the changes needed in the design of the building to reach the points required by LEED. At the first stage, the number of points the case study earns in its current format (Scenario 1) were assessed, then the cost difference of getting either the Certified (Scenario 2) or Silver (Scenario 3) level LEED certification for the building was studied. It was found that besides some technical considerations, filling the criteria of the Certified and Silver level increases the total costs of construction by 3.4% and 5.9%, respectively. Further improvement of the building’s energy efficiency would enable the attainment of a higher-level certification. The results of the study could help to promote the use of green building certifications in Western Asia.

scholarly journals On Best Corrected Mixture Problems in Metallurgy: A Case Study

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
F. Dubeau ◽  
M. E. Ntigura Habingabwa
Keyword(s):  
Minimum Weight ◽  
Minimum Cost ◽  
The Third ◽  
Pareto Curve ◽  
Correction Problem ◽  
The Cost ◽  
Extreme Solutions ◽  
Weight Correction

We consider three simple mixture problems occurring in metallurgy. The first problem considered is the classic minimum cost mixture problem. For the second problem, we consider finding a correction to a given mixture, a premix, without considering the cost of this premix. We only consider the cost and the weight of the quantity used as a correction. We show that the minimum cost correction does not correspond to the minimum weight correction, and we built the Pareto curve that gives all intermediate solutions between these two extreme solutions. Finally, the third problem is the correction problem for a nonfree premix. The correction is done to obtain a minimum cost corrected mixture.

scholarly journals PENERAPAN TIME-DRIVEN ACTIVITY-BASED COSTING PADA PERHITUNGAN HARGA POKOK PRODUK USAHA JASA UNIXON

2017 ◽  
Vol 11 (1) ◽  
pp. 12-31
Author(s):  
Astrid Anastasya Jovanka ◽  
L Jade Faliany
Keyword(s):  
Government Regulation ◽  
Capacity Utilization ◽  
Activity Based Costing ◽  
Cost Information ◽  
Time Consumption ◽  
Consumption Ratio ◽  
Using Data ◽  
The Cost ◽  
Research Show

The purpose of this paper is to calculate branding consultant cost using Time-Driven Activity-Based Costing (TDABC). TDABC calculate cost based on activity that is controlled by time. The method that is used in this research is a case study in Unixon, a small business that works in the field of branding, using data from 2016. Interviews were conducted. The cost and activity database was analyzed. The results of this research show that TDABC can be applied in this Company because it qualified the requirements; diversity in product and different time consumption ratio for each product. TDABC provided more accurate cost information by calculating all costs; cost to make and cost to sell. Implementation of TDABC also show time capacity utilization by comparing actual labor hours and work hours that is controlled by government regulation. By understanding this condition, the owner is able to evaluate the amount of job that is done, time consumption, and employee who is involved. To implement TDABC, the Company must consider each steps needed from identifying activity, assign cost to activity, calculate tariff per activity, to calculate cost of product.

A novel model for risk management of outsourced construction projects using decision-making methods: a case study

2020 ◽  
Vol 10 (2) ◽  
pp. 97-123 ◽  
Author(s):  
Amin Mahmoudi ◽  
Mehdi Abbasi ◽  
Xiaopeng Deng ◽  
Muhammad Ikram ◽  
Salman Yeganeh
Keyword(s):  
Decision Making ◽  
Construction Projects ◽  
Project Managers ◽  
Analytic Hierarchy ◽  
Suitable Alternative ◽  
Content Type ◽  
Proposed Model ◽  
The Cost ◽  
First Time

PurposeSelecting a suitable contract to outsource construction projects is an ongoing concern for project managers and organizational directors. This study aims to propose a comprehensive model to manage the risks of outsourced construction project contracts.Design/methodology/approachTo employ the proposed model, firstly, the types of contracts and risks in the organization should be identified, then, to prioritize the contracts, the identified risks are considered as criteria. After receiving the experts' opinions, the best–worst method (BWM) integrated with grey relation analysis (GRA) method was used to prioritize the contracts. BWM and GRA are multi-criteria decision-making methods with different approaches and applications. In the current study, BWM has been employed to calculate the weights of criteria because it has better performance than other methods such as the analytic hierarchy process (AHP). After calculating the weights of criteria, the GRA method has been utilized for ranking the alternatives.FindingsAccording to the results obtained from the case study, the cost plus award fee contract is the most suitable alternative for outsourcing construction projects. The proposed methodology can be practically applied through different types of the projects such as construction or “engineering, procurement and construction”.Originality/valueTo the best of our knowledge, this is the first time a conceptual model has been proposed to select an appropriate contract for construction projects. Also, for the first time, the BWM integrated with GRA method has been used to prioritize project contracts based on the potential risks. The proposed model can contribute to project managers for selecting a suitable contract with the least risk in construction projects.

ENHANCING THE DAYLIGHT AND ENERGY PERFORMANCE OF EXTERNAL SHADING DEVICES IN HIGH-RISE RESIDENTIAL BUILDINGS IN DENSE URBAN TROPICS

2021 ◽  
Vol 16 (3) ◽  
pp. 87-108
Author(s):  
Nadeeka Jayaweera ◽  
Upendra Rajapaksha ◽  
Inoka Manthilake
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Energy Performance ◽  
Simulation Software ◽  
Baseline Scenario ◽  
Building Model ◽  
High Rise ◽  
Lighting Energy ◽  
Shading Devices

ABSTRACT This study examines the daylight and energy performance of 27 external shading scenarios in a high-rise residential building in the urban tropics. The cooling energy, daytime lighting energy and the spatial daylight autonomy (sDA) of the building model were simulated in Rhino3D and Grasshopper simulation software. The best performance scenario (vertical and horizontal shading on the twentieth floor, horizontal shading only for the eleventh floor and no shading for the second floor) satisfied 75 sDA(300lx|50) with corresponding annual enery performance of 16%–20% in the cardinal directions. The baseline scenario, which is the current practice of providing balconies on all floors, reduced daylight to less than 75 sDA on the eleventh and second floor, even though it had higher annual enery performance (19%–24%) than the best performance scenario. Application of the design principles to a case study indicated that 58% of the spaces had over 75 sDA for both Baseline and Best performance scenarios, while an increase in enery performance of 1%–3% was found in the Best performance scenario compared to the Baseline.

scholarly journals Economic and Technical Considerations in Pursuing Green Building Certification: A Case Study from Iran

2020 ◽  
Author(s):  
Ali Amiri ◽  
Juudit Ottelin ◽  
Jaana Sorvari ◽  
Seppo Junnila
Keyword(s):  
Raw Materials ◽  
Green Building ◽  
Modern Society ◽  
Developed Countries ◽  
Leed Certification ◽  
Western Asia ◽  
The Us ◽  
The Cost ◽  
Technical Considerations

Buildings use 30-40 % of all energy resources and are thus their main consumers in modern society. Moreover, buildings require a vast amount of different raw materials. During the last two decades, several green building certifications have been created in order to consider social, economic and environmental aspects of sustainability of buildings. One of the most famous and widely used of these certifications is Leadership in Energy and Environmental Design (LEED). So far, the use of LEED has concentrated in the US and other developed countries. One reason that restricts the use of this point-based system certification in developing countries is the limited data about its costs. In this study, the extra cost of the certification process will be evaluated besides the changes needed in the design of the building to reach the points required by LEED. At the first stage, the number of points the case study earns in its current format (Scenario 1) were found out, then the cost difference of getting either the Certified (Scenario 2) or Silver (Scenario 3) level LEED certification for the building was studied. It was found that besides some technical considerations, filling the criteria of the Certified and Silver level increases the total costs of construction by 3.4% and 5.9%. Further improvement of the building’s energy efficiency would enable the attainment of a higher-level certification. The results of the study could help to promote the use of green building certifications in Western Asia.

scholarly journals A Case Study of an Office Building to Identify Energy Consumption and Carbon Management Solutions Using Physical Data and Simulation Software

2021 ◽  
Vol 945 (1) ◽  
pp. 012049
Author(s):  
Ramesh Subramaniam ◽  
Vignes Ponniah ◽  
Shalini Sanmargaraja ◽  
Eric Lou ◽  
Muhammad Afiq Bin Nor Adli ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Carbon Emission ◽  
Greenhouse Gas Emission ◽  
Building Energy ◽  
Energy Performance ◽  
Simulation Software ◽  
Office Building ◽  
Total Consumption ◽  
Physical Data

Abstract To measure the level of energy performance of a building, there are several categories of energy consumption to be calculated such as oil, natural gas and electricity. In order to significantly minimise the Greenhouse gas emission in an office, it is important to tap into the positive progress of energy efficiency of equipment which contributes to total energy performance of a building. Consequently, to enable accurate building energy consumption of a building, energy modelling method is applied to identify total consumption and cost of energy usage with effects of carbon emission. Hence, this will help to reduce the costing of energy inside building with differences of efficiency options. Therefore, this paper aims to analyse an office building in terms of the level of energy consumption and carbon emission as a case study. The first objective is to identify the amount of energy consumption and carbon emission inside the building using the simulation software. Secondly, to identify the differences between the data recorded through simulation software and physical data. Finally, to identify solutions to decrease the carbon emission by applying measures towards reducing energy consumption inside the building.

scholarly journals Life cycle energy analysis of a green building in Vietnam

2022 ◽  
Vol 1212 (1) ◽  
pp. 012004
Author(s):  
D L Le ◽  
T Q Nguyen ◽  
H C Pham
Keyword(s):  
Life Cycle ◽  
Energy Analysis ◽  
Green Building ◽  
Green Buildings ◽  
Convincing Evidence ◽  
Simulation Software ◽  
Embodied Energy ◽  
Operational Energy ◽  
Life Cycle Energy Analysis

Abstract The paper presents the life cycle energy analysis (LCEA) of an office green building in Hanoi, Vietnam to prove the advantages of green buildings regarding energy efficiency and environmental effects. The case study building is a concrete structured one, which consists of 3 basements, 17 floors, and 1 attic with a gross area of 14,112 m2. In the study, the building’s embodied energy is determined based on the contained energy coefficient of the ith material and its quantity needed. Whereas, the operating energy is computed according to the annual energy consumption of the building, which is stimulated by the EnergyPlus simulation software. Relying on the relative share of the demolition energy with the life cycle energy that has been proposed by previous publications, this category will be estimated. Results showed that the initial embodied energy contributed the largest share to the life cycle energy (61.37%), followed by operational energy (27.61%). It also indicated that the percentage share of the operational energy of a green building is much lower than that of other buildings. The primary reason for this is associated with the usage of environmentally friendly materials and energy-saving equipment in the design option of the green building. Therefore, it can be convincing evidence that may help to change the mindset of decision-makers in Vietnam about green buildings.

scholarly journals Przydatność arkusza rozliczeniowego kosztów do zarządzania kosztami spółdzielni mleczarskiej

2017 ◽  
Vol 5 (3) ◽  
pp. 35-44
Author(s):  
Marzena Ganc
Keyword(s):  
Decision Making ◽  
Euclidean Distance ◽  
Management Decision ◽  
Main Task ◽  
Cost Information ◽  
Distance Method ◽  
Management Decision Making ◽  
Dairy Cooperatives ◽  
The Cost

The aim of the research is to provide an accounting scheme in dairy cooperatives and to determine its usefulness in obtaining cost information for management decision making. Analysis of the nature of the case study. Intentionally selected dairy cooperative referred to as a typical using Euclidean distance method. Managers need reliable cost information. Providing this information is the main task of the cost account, which is one of the most important components of the accounting, with the task group and setting a number of dependencies between processes, and the amount of the costs. Properly drawn up the billing sheet costs should take into account changes in both production and market environment, the dairy cooperative, because these factors justify a demand for information about the cost.

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