The Effect of New Method of Drawing Energy and Exergy Flows on the Consequences Calculations Economic and Environmental Aspects

Authors

  • Nadhim Hussein Hadree AL-jbouri, Raaid Rashad Jassem AlDoury

DOI:

https://doi.org/10.17762/msea.v71i4.620

Abstract

Nowadays, because of the large amount of energy consumption rates in buildings and the excessive use of fossil fuel and their environmental impact on the environment, as well as the rise of energy prices, which prompted the emergence of the concept of reducing energy consumption. Therefore, reducing the consumption of the amount of energy required in buildings has become one of the global requirements to reduce and rationalize the consumption of fossil fuels and the emissions resulting from them. This study concentrate on determining a rigorous way to plot the flows of both energy and exergy that have been drawn by several investigators. Flow reliability is important because of the subsequent calculations that depend on it, such as the analysis of economic. The current method is based on real measured data of each part of the heating system. The study objective is to apply the analyses of energy, exergy, economic availability, and environmental to the heating system of an existing, well-designed building. The flows of both energy and exergy from the generation to the envelope of the building were examined to determine the consumption energy, its cost and the resulting pollution. The calculations were made using the static building analysis method, as the reference temperature for the heating season was taken as -1oC and the temperature inside the building was considered as 23 oC. The analyzes were applied to the SCOLA building located in the Ozeygin University campus in Istanbul with a building volume of 42,000 cubic meter and a 15,093 meter square of floor area. The results assure that there is no difference between the values ??of input of exergy or energy entering the heating system for both methods 1947 kw and 1901 kw, respectively. Even though there are some differences in losses of both types of energies, efficiencies of distribution and generation, and economic calculations. The exergy losses of the generation stage in both methods are 878 kW and 788 kW, while the distribution phase, 258 kW and 43 kW, respectively.  The results also showed that the availability efficiencies and the index of sustainability of both components (the generation and distribution) of the first method were 32%, 37%, 1.47, and 1.59, respectively. While these values in the seconds method were 34%, 78%, 1.52, and 4.55. They also showed that the energy cost, which was calculated by the new method is 62.52$, while its value in the old method is $67. The results also showed that when improving the energy efficiency to 94%, the total energy becomes 1784 kW for the generation and 1837 kW for the distribution. While total exergy and its cost decrease to 1566 kW and 52$, respectively by making the generation exergy efficiency equals to 42%. Moreover, improving the distribution exergy efficiency to 86%, the amount of total exergy and the total cost become 1825 kW and $60.32 respectively.

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Published

2022-08-29

How to Cite

Nadhim Hussein Hadree AL-jbouri, Raaid Rashad Jassem AlDoury. (2022). The Effect of New Method of Drawing Energy and Exergy Flows on the Consequences Calculations Economic and Environmental Aspects. Mathematical Statistician and Engineering Applications, 71(4), 1256–1282. https://doi.org/10.17762/msea.v71i4.620

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