17 research outputs found
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Long-term performance of the Hunn passive solar residence
Detailed performance and annual energy consumption data are reported, as well as occupant observations and conclusions, for three heating seasons in the Hunn hybrid passive/active solar residence located in Los Alamos, New Mexico. The performance data were gathered by the Los Alamos National Laboratory and include hourly storage wall and interior temperature data for a midwinter period, an interior air-temperature histogram, and measured auxiliary energy consumption and solar heating fraction for each heating season. Also, energy and cost savings over the three-year period are estimated
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Passive solar analysis and design of commercial buildings using DOE-2
The custom weighting-factor loads calculative method that was implemented in the DOE-2.1 program was refined and fully documented. This method allows direct-gain and night-ventilative-cooling passive systems to be analyzed using DOE-2. A thermal storage wall model for DOE-2 was developed and tested.This model treats vented and unvented storage walls using either masonry or water as the storage medium. It includes the effect of night insulation and selective surfaces. A model for attached sunspaces, atriums, and buffer spaces has also been developed for DOE-2. This model simulates interzone convection (forced or natural), and interzone conduction through massive walls. A case study of Warner Hall at Carnegie-Mellon University in Pittsburgh, Pennsylvania was completed, as part of the DOE Passive Solar Commercial Buildings Program. DOE-2 was used in an analysis of several passive solar and energy conservation retrofit options. The Los Alamos analysis served as a basis for comparison to a more limited (in time and budget) analysis done by the energy consultant for the retrofit project
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ELECTRICAL ENERGY CONSERVATION AND PEAK DEMAND REDUCTION POTENTIAL FOR BUILDING IN TEXAS: PRELIMINARY RESULTS
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DOE-2 Verification Project: Phase I results
A computer program, designated DOE-2 (formerly DOE-1), has been developed to provide architect/engineers with a public domain tool for fast and economic energy analysis of buildings. Los Alamos Scientific Lab. has developed and implemented a program plan to verify DOE-2. Phase I of this plan is an analytical verification of the DOE-2 program as a computational unit rather than as separate algorithms. Work on Phase I of the DOE-2 Verification Project is nearly complete. Results of the crosscheck with ASHRAE loads calculative procedures, as well as the results of a line-by-line check of program constants and flag-setting algorithms, are reported. Also presented are results of empirical tests of the full DOE-2 program, including comparisons with measured energy consumption, and preliminary results of a study of the user interpretation of input data on predicted results
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Comparison of DOE-2 computer program simulations to metered data for seven commercial buildings
As part of the DOE-2 Verification Project being conducted by the Los Alamos Scientific Laboratory, seven existing commercial buildings were simulated using the DOE-2 computer program. These buildings included a restaurant, single-floor office building, retail store, hospital, multifloor office building, school, and solar-heated and -cooled building. This comparison test required each building to be simulated by a separate contractor or national laboratory. Predictions of the DOE-2 computer program were then compared to the utility company monthly metered data. Results of these comparisons for gas/fuel oil use, electric energy use, and total energy use are reported
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Use of an atrium for the passive-solar retrofit of an office building: design and installation experience
A clerestory window system has been installed over a courtyard in an existing two-story office building/museum at the Los Alamos National Laboratory, thus creating an atrium. This atrium serves as a passive solar heating and daylighting system for the building and provides new display space for the museum. The retrofit consists of a roof-mounted clerestory window system with night insulating shutters which: forms an atrium that provides new museum space, buffers the former courtyard walls and windows, preheats ventilation air for the entire building, and provides daylighting and heating for the new museum space. The passive system is coupled to the heating, ventilating, and air-conditioning (HVAC) system of the surrounding building by inducing fresh-air makeup through the solar-tempered atrium; heating, cooling, and daylighting are addressed in the design. The design process, the use of the DOE-2 building energy analysis computer program during design, and the construction of the atrium are described
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Design of an atrium for a passive-solar retrofit of an office buildings
The Los Alamos Scientific Laboratory (LASL) has proposed to retrofit one of its administrative office buildings with a solar atrium. A 334 m/sup 2/ courtyard will be enclosed with a roof-mounted system of clerestory windows to maximize winter solar gain. This sunspace will thermally buffer the adjoining offices and also will preheat air supplied to the building's conventional heating, ventilating, and air-conditioning (HVAC) system. The use of the DOE-2 building energy analysis computer program in the design of the solar atrium is described. The results of a series of simulations are reported detailing the tradeoffs inherent in the selection of an optimal glazing area, the maintenance of acceptable comfort levels within the sunspace, and intergration of passive-solar devices with the conventional HVAC system. Potential energy savings are also discussed
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DOE passive-solar Class A performance-evaluation program: preliminary results
The major objective of the DOE Passive Solar Class A Performance Evaluation Program is to collect, analyze, and archive detailed test data for the rigorous validation of analysis/design tools used for passive solar research and design. Elements of the plan for Class A validation are described. A proposed validation methodology, including both analytical and empirical tests, a quantitative definition of validation, minimum data requirements, and a standard reporting format, is outlined. The preliminary testing of this methodology using hourly data from two Class A test facilities is presented. Finally, the collection, analysis, and documentation of preliminary data sets is discussed
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Validation of passive-solar analysis/design tools using Class A performance-evaluation data
A major objective of the Class A Performance Evaluation Program is to collect, analyze, and archive detailed test data for the rigorous validation of analysis/design tools used for passive solar research and design. Elements of the plan for Class A validation are described. A proposed validation methodology, including a quantitative definition of validation, minimum data requirements, and a standard reporting format, is outlined. The preliminary testing of this methodology using hourly data from two Class A test facilities is presented. Finally, the collection, analysis, and documentation of preliminary data sets is discussed
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Solar load ratio method applied to commercial building active solar system sizing
The hourly simulation procedure is the DOE-2 building energy analysis computer program. It is capable of calculating the loads and of simulating various control strategies in detail for both residential and commercial buildings and yet is computationally efficient enough to be used for extensive parametric studies. In addition, to a Building Service Hot Water (BSHW) System and a combined space heating and hot water system using liquid collectors for a commercial building analyzed previously, a space heating system using an air collector is analyzed. A series of runs is made for systems using evacuated tube collectors for comparison to flat-plate collectors, and the effects of additional system design parameters are investigated. Also, the generic collector types are characterized by standard efficiency curves, rather than by detailed collector specifications. (MHR