Abstract
Objectives: Energetic and exergetic analysis of the low-temperature heating system in a model library are conducted numerically in this research. Methods: The method of numerical investigation and simulation are employed to compute the energetic and exergetic analysis of the low-temperature heating system in a model library. The use of C++ programming and Hourly Analysis Program software were done the simulation and optimization. The results of this investigation are presented in this article. Findings: Simulation presents that the most of energy which is required for heating is capable to be declined using low-temperature heating system in a model library. It is shown that gas consumption decreases when lowtemperature radiators are applied and the value which is obtained is about 61,458,480 m3/yr. This means that the performance of the lowtemperature radiation is better than high-temperature radiator and it is about 57,150,000 m3/yr. The use of low-temperature radiators and high-temperature radiators are compared in this article. The radiator quality factor of the low-temperature radiators and hightemperature radiators are obtained 0.13 and 0.22, respectively. By using the low-temperature method, radiator quality factor is able to be declined 7% of the energy efficiency. Based on these cases, using the low-temperature system can be used in some regions in Iran. The economic investigation shows that the IRR is evaluated based on discount 30%, and interest rate 22% in 20 years. Application and improvement: The declination of energy consumption in building is significant. Therefore, a method which can use to reduce energy consumption is low-temperature heating in winter. Keywords: Low Temperature Heating, Low Temperature Radiator, Heating, Economic evaluation.
Highlights
Forty percent of total energy is consumed in household, commercial, and public
This point should be mentioned that building which are in cold climate regions of Iran use often heating energy, as a consequence, it is possible to diminish the amount of the energy consumption if low energy buildings is built in cold climate region
The district heating (DH) system is used in some buildings which have constructed in Northern European Countries like Sweden
Summary
Forty percent of total energy is consumed in household, commercial, and public. As a result, these are important sector which is used final energy such as CNG, Diesel, and electricity. The district heating (DH) system is used in some buildings which have constructed in Northern European Countries like Sweden This method applied by many researchers in northern European countries and other regions in the world. These studies are presented as follows: DH networks use hot water as heat transfer fluid [1]. The result of this study shows that 20% of the energy consumption in European countries can reduce if energy performance of the building is modified or use low-energy building [2]. The result of this study was compared by the high-temperature heating system According this comparison, it was observed that enhancing the coefficient of performance (COP) is almost 2% [3]. They applied higher driving force of air in between the radiator panels compared to traditional radiators
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