Various methods can be used to reduce energy consumption in buildings. One of them is the tightening of energy requirements, which, like other methods, cannot result in a worsening of the indoor environmental quality. The article presents a study on the impact of changes in the thermal insulation of the building envelope on the energy demand, heating costs, and emissions. Mathematical models of the dependence of the index of annual usable energy demand for heating (EUH) of a residential house on the thermal transmittance coefficients (Ui) of selected building elements were developed. Values of Ui were adopted at three levels, corresponding to the maximum required values—as approved in Polish law for the periods from 2014, 2017, and 2021. The analyses were conducted for the location of the building in three of the five climate zones of Poland. It turned out that the differences in the energy demand in various locations in Poland amount to 32.6%. The change in Ui in the analyzed period causes a decrease of EUH by almost 27%. Financial savings and a reduction of emissions strongly depend on the fuel used in the building. Increasing the level of thermal insulation of walls increases the perceptible temperature in rooms by 1.2–1.5%.
The present article is an attempt at to prove the thesis that the accurate selection of land use in a local spatial development plan carries over to the behaviours of investors and has a positive influence on the value of land affected by noise nuisance neighbouring an airport-i.e. it does not depreciate it. To this aim, a case study of transaction prices of non-developed land located near the Bydgoszcz airport-Szwederowo was carried out. In its region, two study areas were selected: I-with a noise level of 55-60 dB and II-with a noise level not exceeding 55 dB, and next, the market of land zoned for services-related and services-technical development, parking lots, depots, and warehouses in these areas was diagnosed. Resources of the strategic noise map (SNM) were used in the research. The research period covered years 2016-2018. The studies show that the location of a real property in an impact area of airport noise was not an obstacle and did not limit market turnover of real property which remained under the unfavourable influence of this factor. The reason behind the demand is the shrewd introduction of functions in the local plan in the area of increased noise levels as an expression of coherent land use planning. The article addresses the need for the real estate market for help in planning, decision-making and implementation activities in the field of spatial and real estate management.
This paper presents a case study on how to improve the energy efficiency of an institutional building of significant heritage value through retrofitting the external wall system. This building is located in Upper Silesia, Poland. Due to the architectural value of the facade, thermal insulation had to be applied from the inside. As part of this publication, basing on the measurements and simulations, the authors present the results involving the improvement of energy efficiency of the insulated wall. On this basis, they also demonstrate the impact of insulation from the inside on the change of humidity inside the room. The tests were carried out both quantitatively by means of heat flux measurement and qualitatively by means of infrared temperature measurement. The research was supported by numerical modeling. The obtained results indicate that the thermal insulation used in the form of mineral insulation boards applied from the inside improves thermal insulation of the wall. Thus, heat losses through the examined envelope were limited. Computer simulations indicated that no condensation may occur under the condition considered.
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