OSUVA - Selaus tekijän "Hiltunen, Erkki" mukaan
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A questionnaire case study to investigate public awareness of smog pollution in China's rural areas
(Molecular Diversity Preservation International (MDPI), 31.10.2016)
articleSmog pollution is one of China’s most pressing public health issues today and has therefore received significant attention worldwide. Not only cities but also villages in China are suffering from smog pollution, especially ... -
Analysis of ground heat exchanger for a ground source heat pump : A study of an existing system to find optimal borehole length to enhance the coefficient of performance
(World Scientific and Engineering Academy and Society (WSEAS), 2017)
articleGround Source Heat Hump is one of the emerging technic to utilize the reservoir of geothermal energy in Europe. The crucial factor is to find the optimal length of the borehole to successfully design a heating system. The ... -
Behavior of B20 fuels in arctic conditions
(Estonian Agricultural University, Faculty of Agronomy, 2019)
articleSeveral renewable and sustainable liquid fuel alternatives are needed for different compression-ignition (CI) engine applications to reduce greenhouse gas (GHG) emissions and to ensure proper primary energy sources for the ... -
Ecological governance in rural areas : Finnish approaches and practices
(Academic Journals, 15.08.2014)
articleAlong with the development of rural areas, rural ecological issues caused by inappropriate anthropogenic activities have not been drowned in the contexts of global environmental problems. The acceleration of rural development ... -
Effects of sulphur on the storage stability of the bio and fossil fuel blends
(Estonian Agricultural University, Faculty of Agronomy, 2017)
articleIn this study, the aim was to find out if mixing two common fuels together could be beneficial for both the environment and storage stability of fuel. It is obvious, that adding biodiesel to fossil fuel will decrease its ... -
Evaluating heat current through concrete crush for heat storing application : a preliminary study using polynomial fitting for heat current curves
(IEEE, 13.02.2020)
conferenceObjectThe purpose of this paper is to study heat current through concrete crush as the crush is considered a possible material for heat storage. The heat current parameter is important for heat storages as it describes how ... -
Feasibility of New Liquid Fuel Blends for Medium-Speed Engines
(Molecular Diversity Preservation International (MDPI), 20.07.2019)
articleSeveral sustainable liquid fuel alternatives are needed for different compression ignition (CI) engine applications. In the present study, five different fuel blends were investigated. Rapeseed methyl ester (RME) was used ... -
Fuel blends behavior in freezing-melting phase transition
(Technische Akademie Esslingen, 2019)
conferenceObjectSeveral renewable and sustainable liquid fuel alternatives are needed for different compression-ignition (CI) engine applications to reduce greenhouse gas (GHG) emissions. Biodiesels, FAMEs, have been studied for long time ... -
Kinematic viscosity studies for medium-speed CI engine fuel blends
(Estonian Agricultural University, Faculty of Agronomy, 2018)
articleEngine - driven power plants, run by diesel fuel or gas, will be needed for peaking power to keep the electricity grids stable when the production of renewable electricity, e.g. utilizing wind or solar power, is increased. ... -
Microalgae Chlorella vulgaris biomass harvesting by natural flocculant : effects on biomass sedimentation, spent medium recycling and lipid extraction
(BMC, 2018)
articleBackground: Microalgal biomass harvesting using traditional chemicals is costly for the production of biofuels, hindering the scale-up process of the technology. Thus, the search for a cost-effective microalgal harvesting ... -
Reliable Renewable Hybrid Energy Solutions
(SWEDES Centre, 2019)
articleWorldwide studies, including the Paris agreement, show that it is necessary to reduce dependency on the non-renewable energy sources and fossil fuels such as oil and coal. Transition to renewable energy is evident, and ... -
Risks of climate change effects on renewable energy resources and the effects of their utilisation on the environment
(Elsevier, 19.01.2024)
articleRenewable energy resources are essential for combating climate change. However, their use, production and collection have environmental impacts and climate change effects also affect them. The unique contributions were ... -
Seabed sediment : a natural seasonal heat storage feasibility study
(Estonian Agricultural University, Faculty of Agronomy, 2017)
articleThe new discovery among renewable energy resources, seabed sediment, has been utilised as a heat source for 42 houses in Vaasa since 2008. Sediment heat is annually loaded by the Sun. In this study the amount of annually ... -
Seabed Sediment as an Annually Renewable Heat Source
(MDPI, 15.02.2018)
articleThermal energy collected from the sediment layer under a water body has been suggested for use as a renewable heat source for a low energy network. A prototype system for using this sediment energy was installed in Suvilahti, ... -
Statistical Investigation of Climate Change Effects on the Utilization of the Sediment Heat Energy
(MDPI, 07.01.2022)
articleSuvilahti, a suburb of the city of Vaasa in western Finland, was the first area to use seabed sediment heat as the main source of heating for a high number of houses. Moreover, in the same area, a unique land uplift effect ... -
Strategies for lipid production improvement in microalgae as a biodiesel feedstock
(Hindawi, 25.07.2016)
articleIn response to the energy crisis, global warming, and climate changes, microalgae have received a great deal of attention as a biofuel feedstock. Due to a high lipid content in microalgal cells, microalgae present as a ... -
Temperature measurements on a solar and low enthalpy geothermal open-air asphalt surface platform in a cold climate region
(MDPI, 21.02.2020)
articleSolar heat, already captured by vast asphalt fields in urban areas, is potentially a huge energy resource. The vertical soil temperature profile, i.e., low enthalpy geothermal energy, reveals how efficiently the irradiation ... -
The air temperature change effect on water quality in the Kvarken Archipelago area
(Elsevier, 04.03.2023)
articleThe Kvarken Archipelago is Finland's World Heritage site designated by UNESCO. How climate change has affected the Kvaken Archipelago remains unclear. This study was conducted to investigate this issue by analyzing air ... -
The effect of sulphur content on B20 fuel stability
(Estonian University of Life Sciences, 2016)
articleThe aim of this study was to investigate if a high amount of sulphur is favourable for the fuel blends' storage stability. The parameters that correlate with the storage stability of the fuel blends were compared with two ... -
Thermal Response of Multiple Pipes and Fluids Using COMSOL for Geothermal Energy System Application
(NAUN, 2014)
articleA geothermal system is modeled using COMSOL. The purpose is to study and evaluate the thermal response of the pipes and the fluids. The model is designed for a low energy network. A part of this network is used to collect ...
