Kommunicera vetenskap och extramuralt lärande (2004)
Vetenskapscentret och planetariet är institutioner som utgår ifrån situationer till skillnad museet som utgår från föremål. Deras didaktik präglas av extramuralt lärande, interaktivitet och...
ESES, A European Master's Program In Solar Energy Engineering (2004)
Lindberg, Eva, Broman, Lars, Bales, Chris
The first group of students was admitted to the European Solar Engineering School, a master’s level two-semester program at Dalarna University in Sweden, in August 1999. Now that the fifth group is...
Lindberg, Eva, Kraus, Alex, Broman, Lars
In order to achieve high efficiency in a thermophotovoltaic (TPV) generator, it is important that a high fraction of emitted photons with energies below the TPV cell band gap are reflected back to...
In order to achieve high efficiency in a thermophotovoltaic (TPV) generator, it is important that a high fraction of emitted photons with energies below the TPV cell band gap are reflected back to...
Solar energy studies and extramural learning (2003)
Extramural learning refers to the educational process that takes place outside the walls of the school (or the university). Extramural learning that takes place in a science center is characterized...
Fabergé optics and edge filter for a wood powder fuelled thermophotovoltaic system (2002)
In order to achieve high efficiency in a TPV generator, it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the emitter. This can be...
In order to achieve high efficiency in a thermophotovoltaic (TPV) generator, it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the...
Non-imaging optics in a thermophotovoltaic generator (2002)
In order to achieve high efficiency in a TPV Generator, it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the emitter. this can be...
Astronomical interactive exhibits (2002)
It has been shown (Franck Pettersen, Master thesis 1995) that a planetarium show has a much larger educational impact if it is accompanied by hands-on experimenting. In the present paper, a number of...
Edge filters in thermophotovoltaic applications (2001)
In order to achieve high efficiency in a TPV generator, it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the emitter. This can be...
Solar energy exhibits at the popular science park Teknoland (2000)
The new Popular Science Park TEKNOLAND in Falun contains a number of interactive solar energy exhibits, including The Solar Heated Chess Board, The Solar Electric Playhouse, The Sudanese Solar Oven,...
Teknoland - popular science park with solar energy exhibits (2000)
The new Popular Science Park TEKNOLAND in Falun contains a number of interactive solar energy exhibits, including The Solar Heated Chess Board, The Solar Electric Playhouse, The Sudanese Solar Oven,...
Beckert, Rolf, Broman, Lars, Jarefors, Kenneth, Bücher, Klaus
The aim of this investigation is to show, whether totally different calibration methods (absolute spectral response at Fraunhofer ISE, blackbody at various temperatures at SERC) give similar results...
Broman, Lars, Jarefors, Kenneth, Marks, Jörgen, Lindberg, Eva
The optical efficiency is a week link in all TPV systems. Many different approaches have been studied earlier, but not much on the possibility to use interference filters. Such filters can be...
Square cones for TPV: experiments and computer simulations (1998)
Broman, Lars, Jarefors, Kenneth, Lindberg, Eva, Marks, Jörgen
The efficiency of a TPV generator is very dependent on selective optical properties of the chain emitter-filter-TPV cell-reflective backing. If a selective reflective edge filter using multiple...
Overview of European activities in thermophotovoltaics (1997)
Schubnell, Markus, Gabler, Hansjörg, Broman, Lars
In Europe several research institutes and private companies are currently working or have been working in thermophotovoltaics. At the Solar Energy Research Center SERC in Sweden, the possibility of...
Efficiency measurements of TPV cells (1997)
Broman, Lars, Jarefors, Kenneth, Marks, Jörgen, Wanlass, Mark
An apparatus for measuring TPV cell efficiencies at different radiation intensities and for different graybody emitter temperatures has been constructed. The apparatus has been used for measuring V-I...
Performance comparison of combitanks using six-day test (1997)
Lorenz, Klaus, Bales, Chris, Broman, Lars
This paper compares the performance of configurations of solar heating combitank systems, which are designed to provide both space heating and domestic hot water (DHW), using a specially designed...
A low-cost versatile solar hot water system for school laboratory work (1997)
Broman, Lars, Gustafsson, Kjell
A versatile low-cost solar hot water collector for school laboratory work has been constructed. It consists of a 4 dm2 absorber connected to an 80 cc storage tank. It is a complete system that works...
Solar energy at northern latitudes (1997)
A joint project between SERC, SLU and National Renewable Energy Laboratory NREL in Golden, Colorado, USA aims at building a wood powder fuelled TPV generator. An emitter temperature around 1500 K is...
Parabolic dish concentrators approximated by simple surfaces (1996)
Two different concentrating mirrors have been constructed that resemble parabolic dish reflectors. Both mirrors are made of slightly curved strips of flat, bendable material. The strips of the most...
Science in informal education (1996)
The course Popular Science with Emphasis on the Didactics of Science Centers (5 cr. + 5 cr. extension) is held at Dalarna University College for the first time during the academic year 1995/96. In...
Parabolic dish reflectors for solar applications approximated by simple surfaces (1996)
Two different concentrating mirrors have been constructed that resemble parabolic dish reflectors. Both mirrors are made of slightly curved strips of flat, bendable material. The strips of the most...
Parabolic dish reflectors for solar applications approximated by simple surfaces (1996)
Two different concentrating mirrors have been constructed that resemble parabolic dish reflectors. Both mirrors are made of slightly curved strips of flat, bendable material. The strips of the most...
Thermophotovoltaics bibliography (1995)
A bibliography containing 200 entries on thermophotovoltaic conversion of energy between 1960 and 1995 has been compiled. The entries are categorized with respect to type and contents.
Electricity from wood powder : Report on a TPV generator in progress (1995)
Broman, Lars, Jarefors, Kenneth, Marks, Jörgen
A joint project between NREL, SLU and UCFB aims at building a wood powder fueled TPV generator. The progress of the project is presented.
TRNSYS, the most complete solar energy system modeling and simulation software (1994)
Beckman, William A, Broman, Lars, Fiksel, Alex, Klein, Sanford A, Lindberg, Eva, Schuler, Mattias
The five computer programs TRNSYS, PRESIM, TRNSED, ONLINE, and PREBID have been put together into a program package which is the most complete solar energy system modeling and simulation software...
Museum exhibits for the conics (1994)
It is rather common nowadays that museums, especially those of the "science center" type, have showcases where visitors can perform experiments. In the Futures' Museum in Borlänge we have made an...
Wood fuel has a high energy density, 18.3 MJ/kg dry matter, and it is combustible also in existing oil furnaces (in the range 1-15 MW) with little alteration. In principle, wood powder would be a...
The development of a thermophotovoltaic converter that uses combustion of wood powder as energy source has started with development of the combustion source. During the last few months, we have...
The purpose of the calculations was to estimate the most suitable slopes and azimuths for three different positions per day of a solar panel in order to obtain the most possible energy from the PV...
Villasystem för solvärme (1993)
Lorenz, Klaus, Bales, Chris, Börjesson, Kent, Broman, Lars
Del 1: Innehållsförteckning och korta sammanfattningar DEL 2: Verksamhetsberättelsen för perioden maj 1992 till april 1993 beskriver de arbeten som har gjorts av villasolvärmegruppen på SERC...
On the possibility of space generated solar electricity for the Antarctic (1991)
A space based solar power plant could be placed in a geostationary orbit 36000 km above the earth's equator. A receiving station must be north of 81.3 degrees latitude south for the satellite to be...
Solar collector geometries at high latitudes (1991)
Insolation onto and energy output from solar collectors have been estimated for some typical high latitude locations using the F-Chart computer program and weather data from the Swedish...
Presentation of PRESIM. A userfriendly pre-processor for TRNSYS (1991)
Nordlander, Svante, Rönnelid, Mats, Isakson, Per, Broman, Lars
The ISES Solar World Congress Clean and Safe Energy Forever was held in Kobe, Japan, September 4-8, 1989. Short impressions from the conference and the simultaneous exhibition are given. On our...
Presentation of PRESIM - a user-friendly preprocesssor for TRNSYS (1990)
Nordlander, Svante, Rönnelid, Mats, Isakson, Per, Broman, Lars
Use of nonimaging concentrators for moderate concentration of sunlight onto PV cells (1989)
Broman, Lars, Rönnelid, Mats, Binder, Betty, Lindberg, Eva
The square cornet type nonimaging concentrator has been shown useful for moderate concentration of sunlight onto photovoltaic solar cells, since it creates no hot spots at the exit aperture. In this...
Optical properties of the Czechoslovakian Fresnel lens measured using a laser beam (1989)
Broman, Lars, Lindberg, Eva, Börjesson, Kent
Linear glass Fresnel lenses have been experimentally investigated by means of a narrow He-Ne laser beam, both at normal incidence and at various combinations of meridional and sagittal angles of...
PRESIM - a graphical interactive preprocessor for modular simulation programs (1989)
Nordlander, Svante, Rönnelid, Mats, Isakson, Per, Broman, Lars
PRESIM is a computer program for creating, storing, retrieving and changing input data for modular HVAC programs. The user works with CAD-style tools. The program also produces system schematics and...
PRESIM - a graphical interactive preprocessor for modular simulation programs (1989)
Nordlander, Svante, Rönnelid, Mats, Broman, Lars, Isakson, Per, Figueroa, Eduardo
Use of an integrating sphere for transmittance measurements on nonimaging concentrators (1989)
Broman, Lars, Rönnelid, Mats, Karlsson, Björn, Bergkvist, Mikael, Wäckelgård, Eva
Solar energy in developing countries - new perspectives and experiences (1989)
Kristofersson, Lars, Garg, H.P., Espensen, Torben, Carlsson, Stig, Broman, Lars
Rapport från/report from ISES Solar World Congress Hamburg September 13-18 1987 (1988)
Broman, Lars, Börjesson, Kent, Nordlander, Svante, Rönnelid, Mats
Solar energy for developing countries - solar energy seminar in Borlänge August 27 1988 (1988)
Ott, Aadu, Broman, Lars, Datta, R.L., Kristofersson, Lars, Bokalders, Varis, Persson, Folke, ...
Workshop on PRESIM - a graphical preprocessor for modular simulation programs e.g. TRNSYS (1988)
Broman, Lars, Figueroa, Eduardo, Isaksson, Per, Nordlander, Svante, Rönnelid, Mats
Analysis of four different solar corner concentrators (1987)
Broman, Lars, Broman, Arne, Nordlander, Svante, Rönnelid, Mats