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Economically optimal level of thermal insulation for single-family houses in Kyrgyzstan.

Number: pap. n. 149

Author(s) : BOTPAEV R., OROZALIEV J., VAJEN K.

Summary

Residential buildings in Kyrgyzstan consume a large amount of energy for space heating. This heat demand can easily be reduced by implementing efficiency measures such as thermal insulation of the building envelope. The aim of this paper is to find the most economical level of thermal insulation for a single-family house considering local conditions in Kyrgyzstan (continental climate, energy prices scenarios, availability of materials etc.). The thermal behavior of a typical single-family house was investigated by computer simulations in TRNSYS 17.1. The mathematical model of this house includes 3 thermal zones. Two different fuels for heating systems were considered: natural gas (imported) and electricity (from domestic hydro power). To identify the optimal insulation level, the insulation (polystyrene, basalt, glass fiber) thickness was changed step by step for external walls, ground floor and roof from 0 to 0.4 m. To obtain the optimal values a large quantity of possible combinations with intercorrelated impact of each of them on the heat demand was considered by simultaneously varying insulation thicknesses for these three construction elements. This complex calculation was carried out by coupling GenOpt, an optimization tool, with TRNSYS. Using combined Particle Swarm (PSO) and Hooke-Jeeves optimization algorithms (implemented in GenOpt), the optimal thicknesses of the insulation were determined. The investigation showed that insulation for the chosen single-family house is not always economically justified in Kyrgyzstan, especially in case of electrical heating. However, it is economically feasible if a gas heating system is installed. The results are discussed in detail in this paper.

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Pages: 11 p.

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Details

  • Original title: Economically optimal level of thermal insulation for single-family houses in Kyrgyzstan.
  • Record ID : 30005835
  • Languages: English
  • Source: EuroSun 2012: solar energy for a brighter future. ISES-Europe solar conference. Conference proceedings: Rijeka, Croatia, 18-20 September 2012.
  • Publication date: 2012/09/18

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