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Gaziemir, Turkey

Yucer C.T.,Air Force NCO College | Hepbasli A.,Yasar University
Energy and Buildings | Year: 2014

This study deals with exergetic and exergoeconomic analyses of a building heating system, which is examined from the generation component to the envelope of the building. The energy and exergy flows between the components are calculated using the predesign tool for an optimized building design. To the best of the authors' knowledge, the specific exergy costing (SPECO) method is applied to a building along with a low-exergy (also referred to as Lowex) analysis for the first time. By adding the value from the generation to the emission components, the exergetic cost coefficients of the products are determined to be 174.67 $/GJ and 256.89 $/GJ, respectively. Exergetic cost effectiveness (ECE) parameter is used to decide about which components will be improved. The first two high values are found to be 0.469 and 0.0057 for the generation and the building envelope, respectively. © 2014 Elsevier B.V. Source


Acikkalp E.,Bilecik University | Yucer C.T.,Air Force NCO College | Hepbasli A.,Yasar University | Karakoc T.H.,Anadolu University
Energy and Buildings | Year: 2014

The main objective of the present study is to model, analyze and assess a building heating system along with its main components through advanced low exergy method. This method is shortly called ADLOWEX and combines advanced exergy (AD) with low exergy (LOWEX) for the first time by the authors. In the ADLOWEX analysis method, a building heating system is investigated from the energy production to the building envelope by dividing exergy destructions into four basic parts, namely endogenous, exogenous, avoidable and unavoidable exergy destruction rates first. The mexogenous exergy destructions for all components are determined. The endogenous and exogenous exergy destructions of the system are 27% and 73% while the avoidable and unavoidable exergy destructions are 26.2% and 73.8%, respectively. © 2014 Elsevier B.V. Source


Acikkalp E.,Bilecik University | Hepbasli A.,Yasar University | Yucer C.T.,Air Force NCO College | Karakoc T.H.,Anadolu University
Energy and Buildings | Year: 2015

Buildings are of great importance in terms of consumption of energy all over the world. Building sector has a significant influence over the total natural resource consumption and is significant contributors of greenhouse gases. Exergy-based methods in assessing the performance of buildings have become very popular in recent years. In this context, conventional exergoenvironmental methods include exergy and life cycle analysis and are considered to be very reliable to evaluate environmental impacts of any system. Advanced exergoenvironmental analysis is a combination of advanced exergy analysis and life cycle assessment. This study deals with determining the environmental effects of a building heating system at various stages. Advanced exergoenvironmental method is applied to the system from the primary energy transformation to the environment. Using advanced exergoenvironmental analysis relations, between the components and the stages (endogenous, exogenous parts), the improvement potentials (avoidable and unavoidable parts) and the advanced exergoenvironmental rates for the system stages are determined. A parametric study is undertaken to investigate effects of the environment temperature on exergy destruction rates and the environment temperature on efficiencies. Based on the environmental temperature, a sensitivity analysis is also performed for exergy destruction rates and efficiencies. Results show that the exogenous environmental impact of the system is 68.6% while the avoidable exergoenvironmental impact is only 7%. ©2014 Elsevier B.V. All rights reserved. Source


Acikkalp E.,Bilecik University | Yucer C.T.,Air Force NCO College | Hepbasli A.,Yasar University | Karakoc T.H.,Anadolu University
Energy and Buildings | Year: 2015

The present study deals with evaluating the performance of a building heating system along with its main components using advanced low exergoeconomic analysis method. This method combines advanced exergoeconomic with low exergy (LowEx) and is shortly called ALEXERGO. A building heating system is investigated from the energy production to the building envelope stage by stage through the ALEXERGO for the first time by the authors. Based on the results, the generation and distribution stages are found to have bigger exogenous exergy destruction cost rates, meaning that the components in these stages have strong interconnections. The emission (heating) stage has, however, a bigger endogenous exergy destruction cost rate. The generation and emission stages have low improvement potentials while the distribution stage has a big improvement potential. A sensitivity analysis is also made based on the environmental temperature for exergy destruction rates and efficiencies. © 2014 Elsevier B.V. All rights reserved. Source

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