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Thermal Bridging and Linear Thermal Transmittance Calculations for Balconies
2020The thermal performance of building envelopes can be significantly affected by thermal bridging. Thermal bridges are localized areas of high heat flow through walls, roofs, and other insulated building envelope components. Thermal bridging is caused by highly conductive elements that penetrate the thermal insulation or misaligned planes of thermal ...
Mehdi Ghobadi +2 more
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Transmittance Measurements Of Thermal Imaging Lenses
SPIE Proceedings, 1984Instruments for measuring the full aperture transmittance of thermal imaging lenses operating in the 8 to 14 micrometre spectral region are described, and examples of typical results obtained shown. The causes of discrepancies between the actual transmittances measured and those predicted from a combination of the anti-reflection coating performances ...
Christopher D. P. Deans +3 more
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Heat Thermal Transmittance of Log Wall
Applied Mechanics and Materials, 2016This paper deals with the problem of heat thermal transmittance of log walls. Log and cabin are now very popular among investors, so this paper deals precisely with this issue. This paper deals precisely with this issue use physical quantities according EN ISO 7345, which are decisive parameters for this type of wall.
Pavel Řihák, Petr Školník
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III. A thermal telephone transmitter
Proceedings of the Royal Society of London, 1887Abstract We have had so much evidence of the sensitiveness of the Bell telephone receiver to the minutest changes of current, that we have ceased to be surprised at any transmitter which responds to the sounds of articulate speech. But, in the instrument now shown, it was so extremely unlikely that sensible variations of current could
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Electro-thermal model of an optical transmitter
IEEE International Conference on Industrial Technology, 2003, 2004This paper presents a model of an optical transmitter module (driver & laser) which takes into account temperature, besides electrical and optical effects. MOSFET is an important component of the driver, temperature occurs in its different parameters such as carrier mobility. The vertical cavity surface emitting laser (VCSEL) is managed by equations of
M. Karray, P. Desgreys, J.-J. Charlot
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Thermal crosstalk of integrated multiwavelength transmitters
Conference Digest. ISLC 1998 NARA. 1998 IEEE 16th International Semiconductor Laser Conference (Cat. No. 98CH361130), 1998Simulations and experimental results on thermal crosstalk of integrated ridge waveguide DFB multiwavelength laser transmitter sources are presented. The thermal resistance of the laser to heat sink transition is a crucial parameter. Thermal crosstalk can be eliminated by a simple on-chip temperature control.
F. Fidorra +10 more
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Results of Vibrational and Thermal Test for MOLI Laser Transmitter
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019The vegetation lidar mission named " MOLI: Multi-footprint Observation Lidar and Imager" has been studied by the JAXA in cooperation with forest biomass researchers. MOLI aimed to measure accurate canopy height from the international space station. The MOLI lidar system employs double laser beam footprints along the track for improving the precision of
Daisuke Sakaizawa +4 more
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A Mixed Flow Thermal Transmittance Tester for Textiles
Textile Research Journal, 1982A laboratory instrument is described that measures thermal transmittance of textiles under a mixed flow state of free convection. The apparatus uses solid state heat flow transducers situated on large flat plate heat sinks that are critically spaced, guarded, and temperature-regulated.
C.B. Hassenboehler, T.L. Vigo
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Measurement of envelope thermal transmittances in multifamily buildings
Energy and Buildings, 1989Abstract One of the uncertainties in the energy balance of buildings is associated with the envelope thermal transmittance which, based on blueprints, can be determined from handbooks and engineering calculations. The calculated value is of questionable accuracy due to variable construction practices, uncertainties in material properties, and ...
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