Boras, Sweden

The SP Technical Research Institute of Sweden, in Swedish SP Sveriges Tekniska Forskningsinstitut, is a joint stock company, fully owned by the Swedish government. It was formerly known as Statens Provningsanstalt , thus the abbreviation SP. The company has its headquarters in Borås and employs 1000 persons.Business areas include, among other things, applied research, technical studies and investigations, quality assurances, standardization and certification. Wikipedia.

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« Columbia team develops new prelithiation method to increase Li-ion battery energy density by 10-30% | Main | DOE’s $10M Advanced Water Splitting Materials Consortium accelerating development of green hydrogen production » Morphic Technologies’ subsidiary, Cell Impact, signed a collaboration agreement with PVD surface coating company Impact Coatings AB concerning new types of surface treatment material for fuel cell flow plates. The arrangement will add coatings from Impact Coatings to the products on offer. Cell Impact’s main operation involves the cost-effective production of flow plates, one of the key components in a fuel cell system. The flow plates are responsible for a large proportion of the costs and their ability effectively to conduct the fuel into the fuel cell is absolutely critical for the entire system’s ability to generate electricity. The collaboration with Impact Coatings is intended to offer completely new surface treatment materials that will lower production costs, improve performance and increase efficiency. The development is being run as a collaborative venture between Cell Impact, Impact Coatings, SP Technical Research Institute of Sweden and the University of Uppsala. The outer layer of the flow plates plays a major role in the durability and effectiveness of the entire system. By protecting the flow plates from the corrosion that the acid environment within the fuel cell would otherwise lead to, different metals and ceramic coatings can extend the life of the fuel cell. To date, the surface coating has primarily been made of various types of precious metals. Impact Coatings has developed a technology that makes it possible to replace the precious metals with other materials, which will reduce the cost of the surface coating by up to 90% without the efficiency of the flow plate being affected.

Hiller C.,SP Technical Research Institute of Sweden
Energy and Buildings | Year: 2012

The aim of this paper is to contribute to the knowledge about energy use in residential buildings. Field measurements were carried out in 57 electrically heated Swedish single-family houses, where the total energy use (i.e. electricity use for space heating, household electricity and electricity use for hot water production), indoor temperatures and water use were recorded during four winter days. Some of the findings were that differences for households' total energy use of similar houses were large. The characteristics of load curves clearly differ between weekdays and weekend days. The water use differs greatly for the households. This paper is part of a larger project where time use diaries were used in order to further link the energy use to residents' every day energy related behaviours. To get a better understanding of the energy use in our homes is a prerequisite to be able to both recognise the problems as well as the potentials of reaching energy goals of our society, leading to a decreased impact on the environment from the building sector. © 2012 Elsevier B.V. All rights reserved.

Li Y.Z.,SP Technical Research Institute of Sweden | Ingason H.,SP Technical Research Institute of Sweden
Fire Safety Journal | Year: 2012

Effects of different ventilation systems, ventilation velocities, heat release rates, tunnel geometries and fire sources on the maximum excess gas temperature beneath the ceiling in large tunnel fires are analyzed. Data from numerous model scale tests and most of the large scale tunnel fire tests that have been performed worldwide are used and analyzed. Correlations for the maximum ceiling excess gas temperature in the vicinity of the fire source are proposed for low and high ventilation flows. The temperature data indicate two regions, depending on the dimensionless ventilation velocity. Each can be divided into two sub-regions. The first sub-region exhibits linear increase which transits into a constant period, depending on the fire size, ventilation and the effective tunnel height. The maximum excess gas temperature is found to be 1350 °C. © 2011 Elsevier Ltd. All rights reserved.

Soroudi A.,SP Technical Research Institute of Sweden | Jakubowicz I.,SP Technical Research Institute of Sweden
European Polymer Journal | Year: 2013

This review presents scientific findings concerning the recycling of bioplastics, their blends and thermoplastic biocomposites, with special focus on mechanical recycling of bio-based materials. The paper does not include bio-based commodity plastics such as bio-derived polyolefins that are identical to their petroleum-based counterparts and that can be recycled in the same way. During the past few years, recycling of biopolymers and their blends has been studied using both mechanical and chemical methods, whereas in biocomposites, the focus has been on mechanical recycling. This review goes through the findings on the recyclability of various materials, the strengths and weaknesses of applied methods, as well as the potential strategies and opportunities for future improvements. There are still many blends that have not been investigated for their recyclability. Information about commercially available blends containing bioplastics is summarised in the Appendix because of the importance of their possible effects on the conventional plastic recycling streams. © 2013 Elsevier Ltd. All rights reserved.

Thiel V.,University of Gottingen | Sjovall P.,SP Technical Research Institute of Sweden
Annual Review of Earth and Planetary Sciences | Year: 2011

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is a technique designed to analyze the composition and spatial distribution of molecules and chemical structures on surfaces. These capabilities have generated much interest in its use in geobiology, in particular for the characterization of organic biomarkers (molecular biosignatures) at the microscopic level. We here discuss the strengths, weaknesses, and potential of ToF-SIMS for biomarker analyses with a focus on applications in geobiology, including biogeochemistry, organic geochemistry, geomicrobiology, and paleobiology. After describing the analytical principles of ToF-SIMS, we discuss issues of biomarker spectral formation and interpretation. Then, key applications of ToF-SIMS to soft (microbial matter, cells), hard (microbial mineral precipitates), and liquid (petroleum) samples relevant in geobiology are reviewed. Finally, we examine the potential of ToF-SIMS in biomarker research and the current limitations and obstacles for which further development would be beneficial to the field. Copyright © 2011 by Annual Reviews. All rights reserved.

Hakonen A.,Gothenburg University | Stromberg N.,SP Technical Research Institute of Sweden
Chemical Communications | Year: 2011

We demonstrate a nanoparticle based ratiometric fluorosensor suitable for non-invasive high-resolution imaging of complex samples. Coextraction generates a movement of a solvatochromic dye, with a consequent shift from plasmophore coupled emission towards longer wavelength scattering enhanced emission. The nanoparticle doped sensors confirmed superior sensitivity, reversibility, durability and overall image quality. © 2011 The Royal Society of Chemistry.

Hakonen A.,Gothenburg University | Stromberg N.,SP Technical Research Institute of Sweden
Analyst | Year: 2012

A basic square root function was successfully used as a diffusion consistent calibration function that considers depletion mechanisms often occurring within optical chemical sensors. This continuous function improved image quality and simplified the calibration process. It may be a universal tool for the typical response function of reversible diffusion controlled sensing reactions. Further, we demonstrate that the gold nanoparticle interaction based ammonium fluorosensor is suitable for non-invasive high-resolution quantitative imaging of complex samples. The plasmon sensitized optical sensors were utilized as a bioanalytical tool for chemical imaging of natural degradation processes occurring in biological tissues. Analytical performance of the nanoparticle enhanced sensors confirmed superior sensitivity, reversibility, durability and overall image quality over non-doped sensing membranes. Although applied in a complex matrix of high potassium (major interferent) and very high sodium (interferent) excellent performance is achieved. The nanoparticle interaction/coextraction based sensing scheme utilized in this study is general and can be used for numerous ions, preferably combined with the diffusion consistent calibrations for superior analytical performance. A table with 44 commercially available ionophores is provided to guide potential users of this sensor configuration. © 2012 The Royal Society of Chemistry.

Zhang X.,SP Technical Research Institute of Sweden
Journal of Sound and Vibration | Year: 2010

For a sound source, directivity is an important parameter to specify. This parameter also reflects the physical feature of the sound generation mechanism. In this article, studies on the directivity of railway noise, by measurement and by theoretical investigation, are discussed extensively and systematically. The two most important noise types, i.e. rolling noise and aerodynamic noise, are focused on. A model of perpendicular dipole pair is proposed to interpret the measurement specified directivity characters of wheel/rail radiation. This model naturally explains why a vibrating railway wheel does not present dipole directivity character and why rail radiation is of different vertical and horizontal directivity characters. Moreover pantograph noise is also found to be of perpendicular dipole components. As for aerodynamic noise around bogies, scattering of the air flow is proposed to be the mechanism of the noise generation; this understanding leads to a different directivity description for the noise component. Directivities of other important noise types are discussed as well; their directivities become understood, although lacking of relevant directivity data. In summary, this study provides applicable directivity functions together with a survey of the directivities of all important railway noise types and components. Hopefully, this work will be useful, for railway noise engineering also contribute to understand better railway noise. © 2010 Elsevier Ltd.

Pendrill L.R.,SP Technical Research Institute of Sweden
Metrologia | Year: 2014

Measurements often provide an objective basis for making decisions, perhaps when assessing whether a product conforms to requirements or whether one set of measurements differs significantly from another. There is increasing appreciation of the need to account for the role of measurement uncertainty when making decisions, so that a 'fit-for-purpose' level of measurement effort can be set prior to performing a given task. Better mutual understanding between the metrologist and those ordering such tasks about the significance and limitations of the measurements when making decisions of conformance will be especially useful. Decisions of conformity are, however, currently made in many important application areas, such as when addressing the grand challenges (energy, health, etc), without a clear and harmonized basis for sharing the risks that arise from measurement uncertainty between the consumer, supplier and third parties. In reviewing, in this paper, the state of the art of the use of uncertainty evaluation in conformity assessment and decision-making, two aspects in particular - the handling of qualitative observations and of impact - are considered key to bringing more order to the present diverse rules of thumb of more or less arbitrary limits on measurement uncertainty and percentage risk in the field. (i) Decisions of conformity can be made on a more or less quantitative basis - referred in statistical acceptance sampling as by 'variable' or by 'attribute' (i.e. go/no-go decisions) - depending on the resources available or indeed whether a full quantitative judgment is needed or not. There is, therefore, an intimate relation between decision-making, relating objects to each other in terms of comparative or merely qualitative concepts, and nominal and ordinal properties. (ii) Adding measures of impact, such as the costs of incorrect decisions, can give more objective and more readily appreciated bases for decisions for all parties concerned. Such costs are associated with a variety of consequences, such as unnecessary re-manufacturing by the supplier as well as various consequences for the customer, arising from incorrect measures of quantity, poor product performance and so on. © 2014 BIPM & IOP Publishing Ltd.

News Article | September 7, 2016

Research out of the SP Technical Research Institute of Sweden has provided proof of concept for a novel hybrid renewable energy system featuring combined hybrid solar PV and geothermal power.

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