6 research outputs found
Preliminary Results of BTDF Calibration of Transmissive Solar Diffusers for Remote Sensing
Satellite instruments operating in the reflected solar wavelength region require accurate and precise determination of the optical properties of their diffusers used in pre-flight and post-flight calibrations. The majority of recent and current space instruments use reflective diffusers. As a result, numerous Bidirectional Reflectance Distribution Function (BRDF) calibration comparisons have been conducted between the National Institute of Standards and Technology (NIST) and other industry and university-based metrology laboratories. However, based on literature searches and communications with NIST and other laboratories, no Bidirectional Transmittance Distribution Function (BTDF) measurement comparisons have been conducted between National Measurement Laboratories (NMLs) and other metrology laboratories. On the other hand, there is a growing interest in the use of transmissive diffusers in the calibration of satellite, air-borne, and ground-based remote sensing instruments. Current remote sensing instruments employing transmissive diffusers include the Ozone Mapping and Profiler Suite instrument (OMPS) Limb instrument on the Suomi-National Polar-orbiting Partnership (S-NPP) platform,, the Geostationary Ocean Color Imager (GOCI) on the Korea Aerospace Research Institute's (KARI) Communication, Ocean, and Meteorological Satellite (COMS), the Ozone Monitoring Instrument (OMI) on NASA's Earth Observing System (EOS) Aura platform, the Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument and the Geostationary Environmental Monitoring Spectrometer (GEMS).. This ensemble of instruments requires validated BTDF measurements of their on-board transmissive diffusers from the ultraviolet through the near infrared. This paper presents the preliminary results of a BTDF comparison between the NASA Diffuser Calibration Laboratory (DCL) and NIST on quartz and thin Spectralon samples
Applicability of climate-based daylight modelling
This PhD thesis evaluated the applicability of Climate-Based Daylight Modelling (CBDM) as it is presently done. The objectives stated in this thesis aimed at broadly assessing applicability by looking at multiple aspects: (i) the way CBDM is used by expert researchers and practitioners; (ii) how state-of-the-art simulation techniques compare to each other and how they are affected by uncertainty in input factors; (iii) how the simulated results compare with data measured in real occupied spaces.
The answers obtained from a web-based questionnaire portrayed a variety of workflows used by different people to perform similar, if not the same, evaluations. At the same time, the inter-model comparison performed to compare the existing simulation techniques revealed significant differences in the way the sky and the sun are recreated by each technique. The results also demonstrated that some of the annual daylight metrics commonly required in building guidelines are sensitive to the choice of simulation tool, as well as other input parameters, such as climate data, orientation and material optical properties. All the analyses were carried out on four case study spaces, remodelled from existing classrooms that were the subject of a concurrent research study that monitored their interior luminous conditions. A large database of High Dynamic Range images was collected for that study, and the luminance data derived from these images could be used in this work to explore a new methodology to calibrate climate-based daylight models.
The results collected and presented in this dissertation illustrate how, at the time of writing, there is not a single established common framework to follow when performing CBDM evaluations. Several different techniques coexist but each of them is characterised by a specific domain of applicability
Full Proceedings, 2018
Full conference proceedings for the 2018 International Building Physics Association Conference hosted at Syracuse University
Conference on Binary Optics: An Opportunity for Technical Exchange
The papers herein were presented at the Conference on Binary Optics held in Huntsville, AL, February 23-25, 1993. The papers were presented according to subject as follows: modeling and design, fabrication, and applications. Invited papers and tutorial viewgraphs presented on these subjects are included
Sustainable energy for a resilient future: proceedings of the 14th International Conference on Sustainable Energy Technologies
Volume I, 898 pages, ISBN 9780853583134
Energy Technologies & Renewables
Session 1: Biofuels & Biomass
Session 5: Building Energy Systems
Session 9: Low-carbon/ Low-energy Technologies
Session 13: Biomass Systems
Session 16: Solar Energy
Session 17: Biomass & Biofuels
Session 20: Solar Energy
Session 21: Solar Energy
Session 22: Solar Energy
Session 25: Building Energy Technologies
Session 26: Solar Energy
Session 29: Low-carbon/ Low-energy Technologies
Session 32: Heat Pumps
Session 33: Low-carbon/ Low-energy Technologies
Session 36: Low-carbon/ Low-energy Technologies
Poster Session A
Poster Session B
Poster Session C
Poster Session E
Volume II, 644 pages, ISBN 9780853583141
Energy Storage & Conversion
Session 2: Heating and Cooling Systems
Session 6: Heating and Cooling Systems
Session 10: Ventilation and Air Conditioning
Session 14: Smart and Responsive Buildings
Session 18: Phase Change Materials
Session 23: Smart and Responsive Buildings
Session 30: Heating and Cooling System
Session 34: Carbon Sequestration
Poster Session A
Poster Session C
Poster Session D
Policies & Management
Session 4: Environmental Issues and the Public
Session 8: Energy and Environment Security
Session 12: Energy and Environment Policies
Poster Session A
Poster Session D
Volume III, 642 pages, ISBN 9780853583158
Sustainable Cities & Environment
Session 3: Sustainable and Resilient Cities
Session 7: Energy Demand and Use Optimization
Session 11: Energy Efficiency in Buildings
Session 15: Green and Sustainable Buildings
Session 19: Green Buildings and Materials
Session 24: Energy Efficiency in Buildings
Session 27: Energy Efficiency in Buildings
Session 28: Energy Efficiency in Buildings
Session 31: Energy Efficiency in Buildings
Session 35: Energy Efficiency in Buildings
Poster Session A
Poster Session D
Poster Session