PetrSU Studies the "Green Technologies" Effectiveness in House Construction in the Arctic
Scientists from PetrSU and Murmansk State Technical University, within the international project KO 1089 "Green Construction in the Arctic Region" under the Kolarctic Cross-Border Cooperation Program, have developed a laboratory model to test "green technologies" and assess their work effectiveness in the northern territories.
Such a laboratory has already been established at the Botanical Garden of PetrSU, the construction of the laboratory comes to an end in the territory of the Murmansk region.
The laboratory is a 12x6m one-story buildingmade with wooden house construction technologies, equipped with energy-efficient engineering equipment, as well as a special monitoring research system. Sensor system is installed in the walls, which allows to monitor temperature and humidity indicators, in particular, to assess thermal energy losses.
"The pilot facilities (laboratories) established within the project will be used in studies of the effectiveness of different building envelopes (different thermal insulation materials, a "green" roof) and engineering systems (heating, ventilation), alternative energy sources, as well as "smart home" systems. In addition, the model laboratory will be used in the educational process and research of PetrSU students,"
- notes Alexander Kuzmenkov, project manager at PetrSU, Associate Professor of the Department of Technology and Construction Organization, Candidate of Economic Sciences.
Wood was used as the main wallconstruction material, because it is an environmentally friendly and renewable resource.
The laboratory building consists of two volumesinterconnected with a vestibule. Symmetrical parts of the building are made using two different technologies: one part - using frame technology, the other - using double log wall technology. The traditional technology of single log wallconstruction cannot be used in the North in virtue of the low insulation properties oftheconstruction. Both technology utilization at once is also explained by the fact that the double log wall technology cannot be massively applied in the territory of the Murmansk region due to the limited resource base.
The hollowness between the logs of the north-facing wall is divided into 3 parts. The first part is filled with linen mats, the second with wood-flakes, and the third is left unfilled. The north wall of the frame is also divided into three sections. The first part is insulated with linen mats, the middle part with ecowool by spraying, and the third one is insulated with eel grass (material based on dried algae). This solution allowsus evaluate the effectiveness of different thermalinsulation in the constructions and under different weather conditions.
Different alternativesof heating were discussed. The unstable weather temperatures, the absence of water facilitiesin the territory do not allow to use the heatpumps, electric floor heating can lead to wood drying and deformation, installing the XL-Pipe in a cementsand screed isinappropriateto wooden house, and low-temperature electric infra-red panels are appropriateto zoned heating system. The best way of even and quick heating is the electric convectorschosen for installation. The convectors are equipped with a Wi-Fi control module that allows to change the heating settingsusing a smartphone.
Inflow exhaust ventilation with recuperation was chosen as the main ventilation system to increase the energyefficiency class of the building, which provides the house with fresh air without the penetration of cold streams. In order to make a comparative research the possibility of installing the alternative natural ventilation system has been considered.It is more relevant to the log part of the building.
The project isimplemented by PetrSU in cooperation with MSTU, the University of Oulu (Finland), the University of Tromsø (Norway) and the University of Umeå (Sweden).