Currently in Poland, the construction of biogas plants as alternative energy sources is increasing.Often, technical solutions for design and building are transferred to Poland from countries which these technologies developed without taking into account specific climatic conditions prevailing Poland.It does occur that newly built have a problem maintaining sufficiently high temperature winter, caused by insufficient insulation anaerobic digester envelope.This paper presents an analysis heat...

Issues related to reducing the energy demand of residential buildings are still relevant in light transition and ongoing climate change. A single-family house from early 1990s with a heated area approximately 177 m2, located north-eastern part Poland, was used as case study. The article contains results nine years measurements that included consumption for heating domestic hot water preparation. It estimated annual final 128.2 kWh/m2 [462 MJ/m2]. After insulating building envelope replacing...

Hybrid building construction, in which the steel frame is filled with modular panels made of wood, a relatively new technical solution. This type structure allows integration large window surfaces. The aim this study to indicate optimal glazing system, taking into account energy consumption, thermal comfort and economic indicators. A house using hybrid technology an area 152.4 m2, located Bialystok (Northeastern Poland) Kiruna (Northern Sweden), was selected as reference object. Energy...

Due to a technologic progress, growth in the renewable energy markets including high number of manufactures coming being, Renewable Energy Sources (RES) are both tool for mitigating climate changes and investments that can provide direct economic profits reduce political or dependence resulting from import fossil fuels. One many key solutions toward fulfilling global increasing demand reduction CO2 emissions is applying solar technologies. This paper presents results analysis conducted small...

The major intent of this article was to determine the amount energy received by two active systems used convert solar radiation and estimate their impact on reducing emission pollutants. Thermal collectors with an area 51.36 m2 photovoltaic panels 50.4 were subject comparative analysis. It assumed that either could be installed roof old tenement house located in Poznan (Poland), which is planned for renovation. Computer simulations made DesignBuilder software as a research tool. Two main...

This article deals with the determination of impact selected parameters on energy consumption for heating and cooling purposes CO2 emissions. Mathematical modelling combined planning a computational experiment was adopted as research method. The database creating models developed using building simulations performed DesignBuilder software. A single-family house an area 101 m2 subject this study. Four deterministic mathematical estimation annual demand heating, cooling, total final demand,...

The solar domestic hot water (SDHW) system located on the campus of Bialystok University Technology is object research described in current paper. thermal composed 35 flat plate collectors, 21 evacuated tube collectors and eight tanks with capacity 1 m3 each. Solar facility equipped hardware for automatic data collection. Additionally, weather station roof building provides measurements basic parameters ambient air radiation. main objective Regional Operational Program was assessment...

Currently, intensive work is underway in Poland to increase the share of renewable energy sources overall balance. Therefore, this paper presents possibilities using concentrated solar power zones with a temperate climate. A simplified model based on balance collectors considering main operating parameters typical plant was developed. It should be noted here that does not take into account issues related heat accumulation and electricity generation Solar Thermal Power Station. The simulation...

One of the most effective ways to reduce greenhouse gas emissions is widespread use solar panels. A new approach estimating annual energy output ESC liquid-based thermal collectors presented in this paper. The main parameters surrounding environment that affect yield from water heating (SWH) systems are total radiation ES and outdoor air temperature θO. Here, two functions developed allow specification value based on these previously determined factors. article presents subsequent stages led...

The paper presents the solution of laminar forced convection in a square duct recessed thermal insulation. It was assumed that heated walls have constant temperature, while on boundary contact with insulation an adiabatic wall established, and axial heat conduction fluid neglected. relationship between Nusselt number ratio height to duct, which can be used as main parameter design micro-heat exchangers, determined this work. also sample temperature fields heatlines for selected numbers.

The paper presents a proposal for the thermal insulation of pre-insulated twin pipes with shape cross- section described by Cassini oval equation. proposed technical solution oval-shaped has been compared standard, circular constant value cross-sectional area both insulations. All calculations were made using boundary element method (BEM). results unit heat fluxes as function external environment temperatures well sample temperature fields, and heatlines insulation.

One of important parameters a room microclimate is carbon dioxide level that could be predicted using models presented in literature. In buildings with high heat gains from people, like classrooms, conference rooms or gyms, during estimation the CO2 concentration it strongly recommended to take into account changes indoor air temperature. The article presents mathematical model phenomena transport includes transfer between analysed and surroundings, exchange within confines natural...