scholarly journals A Decision-Making Algorithm for Energo-Economic Sustainability and Efficiency in Buildings: A Case Study in Turkey

2019 ◽  
Vol 111 ◽  
pp. 03024
Author(s):  
Derya Kışla Tekin ◽  
Levent Çolak ◽  
Birol Kılkış
Keyword(s):  
Carbon Dioxide ◽  
Decision Making ◽  
Hybrid Systems ◽  
Green Building ◽  
Hvac Systems ◽  
Payback Period ◽  
Energy Sources ◽  
Line Energy ◽  
System Combination

Today, sustainability and energy efficiency are of prime importance in satisfaction of thermal and electrical loads of buildings. In this study, innovative hybrid solutions alternative to conventional HVAC systems are investigated. Objective of study is to minimize the payback period and CO2 emissions are main objectives. For conventional HVAC systems two sources of energy, namely natural gas and electricity were considered as the base line. Energy sources for the innovative methods were considered to be solar energy, ground heat and waste heat. Conventional system was considered to be a backup system when innovative energy resources are insufficient. Hourly heating, cooling and electrical power loads of Eser Green Building, which already has LEED Platinum certificate were used for the case study, which aims to further improve the energy and exergy efficiency. In the new algorithm being developed, all power conversion systems were defined in a simple input- output transfer function format. A decision-making algorithm and an ExcelTM-based simulation program were developed and tried with Eser Green Building input data for different renewable energy source and system combination conventional systems, energy sources, and equipment in term of investment, operation and total cost, payback period, and carbon dioxide emission values. Payback period of Eser green building is 11,8 years and for two hybrid systems are 13,2 years and 9,2 years, respectively. Carbon dioxide emissions by hybrid systems under the same load conditions were found to be 488 kgCO2/h and 592 kgCO2/h for approaches, respectively.

scholarly journals Optimal Synergy between Photovoltaic Panels and Hydrogen Fuel Cells for Green Power Supply of a Green Building—A Case Study

2021 ◽  
Vol 13 (11) ◽  
pp. 6304
Author(s):  
Raluca-Andreea Felseghi ◽  
Ioan Așchilean ◽  
Nicoleta Cobîrzan ◽  
Andrei Mircea Bolboacă ◽  
Maria Simona Raboaca
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Power Supply ◽  
Carbon Dioxide Emissions ◽  
Green Building ◽  
Energy System ◽  
Generation System ◽  
Photovoltaic Panels

Alternative energy resources have a significant function in the performance and decarbonization of power engendering schemes in the building application domain. Additionally, “green buildings” play a special role in reducing energy consumption and minimizing CO2 emissions in the building sector. This research article analyzes the performance of alternative primary energy sources (sun and hydrogen) integrated into a hybrid photovoltaic panel/fuel cell system, and their optimal synergy to provide green energy for a green building. The study addresses the future hydrogen-based economy, which involves the supply of hydrogen as the fuel needed to provide fuel cell energy through a power distribution infrastructure. The objective of this research is to use fuel cells in this field and to investigate their use as a green building energy supply through a hybrid electricity generation system, which also uses photovoltaic panels to convert solar energy. The fuel cell hydrogen is supplied through a distribution network in which hydrogen production is outsourced and independent of the power generation system. The case study creates virtual operating conditions for this type of hybrid energy system and simulates its operation over a one-year period. The goal is to demonstrate the role and utility of fuel cells in virtual conditions by analyzing energy and economic performance indicators, as well as carbon dioxide emissions. The case study analyzes the optimal synergy between photovoltaic panels and fuel cells for the power supply of a green building. In the simulation, an optimally configured hybrid system supplies 100% of the energy to the green building while generating carbon dioxide emissions equal to 11.72% of the average value calculated for a conventional energy system providing similar energy to a standard residential building. Photovoltaic panels account for 32% of the required annual electricity production, and the fuel cells generate 68% of the total annual energy output of the system.

scholarly journals CAPITAL BUDGETING ANALYSIS OF INVESTMENT PROJECT FEASIBILITY IN PT INTEGRA INDOCABINET TBK

2019 ◽  
Vol 1 (2) ◽  
pp. 251-256
Author(s):  
Adetia Wardani ◽  
Ani Wulandari
Keyword(s):  
Decision Making ◽  
Investment Decisions ◽  
Investment Project ◽  
Secondary Data ◽  
Capital Budgeting ◽  
Payback Period ◽  
Property Companies ◽  
Hurdle Rate

This research is a case study conducted in one of the property companies in Sidoarjo, East Java, namely PT Integra Indocabinet Tbk ,. Based on secondary data, PT Integra Indocabinet has increased sales and profits from 2014 - 2018. Therefore, the owners want to expand their expansion by adding new factory facilities so they can get more optimal profits and can increase exports abroad. The research aims to provide assistance in the form of suggestions for decision making between feasible or not worthy of the investment carried out. Based on the calculation, obtained an NPV value of 195,510,594,699 ≥ 0 which means it is feasible to run, an IRR of 22%> hurdle rate (10%) which means it is feasible to run; Payback Period is 4 years 3 months> 5 years which means it is feasible to be implemented; The Profitability Index is 1.98> 0, which means it's worth running. The results of the analysis show that using Capital Budgeting techniques can be seen that investment decisions for expansion are feasible.

Optimal CO2 Reduction Investment of Power Plants under Uncertainties

2013 ◽  
Vol 726-731 ◽  
pp. 1017-1021
Author(s):  
Su Feng Wang ◽  
Mei Deng
Keyword(s):  
Carbon Dioxide ◽  
Decision Making ◽  
Power Plants ◽  
Carbon Price ◽  
Return Rate ◽  
Control Measures ◽  
Fixed Carbon ◽  
Investment Return ◽  
Decision Making Model

According to the current situation of domestic carbon dioxide (CO2) reduction and the abatement planning of power plants, the decision-making model for optimal CO2 abatement investment in power plants has been built concerning uncertainties on CO2 policies and investment return rate. Under the framework, a case study on power plant was introduced. It is found that (i) higher permits price may stimulate power plants to increase abatement investment under certain return rate, (ii) whether power plants choose to invest more or not depends on the value of returns at fixed carbon price, and (iii) investment and its returns will change in the same directions with the investment return rate. It is suggested that for the mitigation goals to be met in a more efficient way, more stringent CO2 control measures and policies to lower investment costs should be taken into account.

scholarly journals Capital Budgeting Analysis Of Investment Project Feasibility in PT Integra Indocabinet TBK

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Adetia Wardani ◽  
Wahyudiono Wahyudiono
Keyword(s):  
Decision Making ◽  
Investment Decisions ◽  
Investment Project ◽  
Secondary Data ◽  
Capital Budgeting ◽  
Payback Period ◽  
Property Companies ◽  
Hurdle Rate

This research is a case study conducted in one of the property companies in Sidoarjo, East Java, namely PT Integra Indocabinet Tbk ,. Based on secondary data, PT Integra Indocabinet has increased sales and profits from 2014 - 2018. Therefore, the owners want to expand their expansion by adding new factory facilities so they can get more optimal profits and can increase exports abroad. The research aims to provide assistance in the form of suggestions for decision making between feasible or not worthy of the investment carried out. Based on the calculation, obtained an NPV value of 195,510,594,699 ≥ 0 which means it is feasible to run, an IRR of 22%> hurdle rate (10%) which means it is feasible to run; Payback Period is 4 years 3 months> 5 years which means it is feasible to be implemented; The Profitability Index is 1.98> 0, which means it's worth running. The results of the analysis show that using Capital Budgeting techniques can be seen that investment decisions for expansion are feasible.

scholarly journals Optimizing Energy Use, Cost and Carbon Emission through Building Information Modelling and a Sustainability Approach: A Case-Study of a Hospital Building

2021 ◽  
Vol 13 (7) ◽  
pp. 3675
Author(s):  
Shabir Hussain Khahro ◽  
Danish Kumar ◽  
Fida Hussain Siddiqui ◽  
Tauha Hussain Ali ◽  
Muhammad Saleem Raza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Energy Efficiency ◽  
Energy Use ◽  
Green Building ◽  
Green Buildings ◽  
Building Information Modelling ◽  
Information Modelling ◽  
Building Information ◽  
Hospital Building

The construction industry (CI) has a significant impact on the environment and on climate change due to the emission of greenhouse gases like carbon dioxide. Globally accepted Sustainable Development Goals (SDG), specifically SDG 7 (Access to Affordable, Reliable, Sustainable and Modern Energy for All), SDG 9 (Industry, Innovation and Infrastructure), and SDG 11 (Sustainable Cities and Communities) stress the responsible utilization of energy in various industries, including construction. The CI uses almost half of the world’s produced energy. Therefore, this research presents insights into the efficient use of energy in the building sector and shows how energy efficiency can be achieved by altering different parameters and components like orientation, materials, glazing, and HVAC systems through a case study of a hospital building in Green Building Studio (GBS). This paper also aims to use the Building Information Modelling (BIM) approach to make environmentally sustainable decisions to reduce energy waste in projects. Initially, beneficial factors of BIM on green buildings were identified in the literature and later ranked, based on expert opinions collected using a set of questionnaires. Average Index was used for data analysis. The identified benefits were validated by conducting energy analyses on a hospital model through 3D BIM. It was concluded that a substantial share of energy cost, carbon dioxide (CO2), and electricity can be saved using this approach. It was determined that a quick and sustainable design process, improved energy efficiency, enhanced building performance, and provision of better design alternatives are the key benefits of the adoption of BIM by such projects. A Cronbach’s alpha value of 0.822 was obtained, which further validates the results. The proposed approach may lead future structures to be sustainable and enriches the culture of energy-efficient green buildings.

Blockchain in Supply Chain: Case Study of Lottemart Ciputat

2019 ◽  
Vol 5 (1) ◽  
pp. 38-49 ◽  
Author(s):  
B. K. Handoyo ◽  
M. R. Mashudi ◽  
H. P. Ipung
Keyword(s):  
Decision Making ◽  
Supply Chain ◽  
Supply Chain Management ◽  
Information Asymmetry ◽  
New Technology ◽  
Business Case ◽  
Analysis Method ◽  
Chain Management ◽  
Production Processes

Current supply chain methods are having difficulties in resolving problems arising from the lack of trust in supply chains. The root reason lies in two challenges brought to the traditional mechanism: self-interests of supply chain members and information asymmetry in production processes. Blockchain is a promising technology to address these problems. The key objective of this paper is to present qualitative analysis for blockchain in supply chain as the decision-making framework to implement this new technology. The analysis method used Val IT business case framework, validated by the expert judgements. The further study needs to be elaborated by either the existing organization that use blockchain or assessment by the organization that will use blockchain to improve their supply chain management.

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