503 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Hvac"  
Results: 1 - 24 next
open access

Improved poultry house

Description: The relationship of energy and poultry production was explored in three areas: methane production from litter, broiler house insulation, and broiler house HVAC systems. The findings show that while a methane plant would not be popular with individual American poultry producers; the pay back in fuel and fertilizer, if the plant was located in close proximinity to the processing plant, would be favorable. Broiler house insulation has been dramatically improved since the outset of this study. Pres… more
Date: unknown
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of helical conductor models for superconducting ac power transmission

Description: In the BNL concept of a superconducting ac power transmission cable the conductors are made of Nb/sub 3/Sn tapes wound helically on cylinders. Recently, it was decided to make each conductor in the form of a double layer winding in which the layers are of opposite helicity. This reduces undesirable consequences of axial flux generation. After reviewing the considerations which lead to the double helix conductor, experiments with short models (0.8 m long) are described. Results are given for ac … more
Date: January 1, 1976
Creator: Garber, M; Barber, T & Morgan, G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Brookhaven superconducting cable test facility

Description: Construction has started on an outdoor testing station for flexible ac superconducting power transmission cables. It is intended to serve as an intermediate step between laboratory-scale experiments and qualification testing of prototype-scale cables. The permanent equipment includes a 500 W supercritical helium refrigerator using a screw compressor and multistage turbine expanders. Helium storage for 250,000 cu ft of helium at 250 psi is provided. Initially, the cables will be tested in a hori… more
Date: August 17, 1976
Creator: Forsyth, E. B. & Gibbs, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dynamic load model study for overhead transmission lines. Final report, November 1975--September 1976

Description: A study was undertaken to examine by scale models the dynamic longitudinal loadings on flexible transmission structures. In the course of the investigation certain new concepts have also been developed concerning the elements of a transmission line system which contributes to the local flexibility of individual structures. Further, new methods of analysis were devised for the future use by designers in this field. These model test results have demonstrated that it is possible to simulate a numb… more
Date: September 1, 1976
Creator: Richardson, Jr, A. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High voltage research (breakdown strengths of gaseous and liquid insulators). First quarterly report, period ending June 30, 1976

Description: Two experimental breakdown apparatuses have been constructed in sequence; the first has provided initial data and lessons for improvement in the second. Breakdown strength measurements have been made for a number of unitary and multicomponent gaseous insulators which were chosen on the basis of physical knowledge concerning their interactions with slow electrons. Most of the systems studied were found to have much better breakdown strengths than SF/sub 6/. For example, the breakdown strengths o… more
Date: September 1, 1976
Creator: Christophorou, L. G.; James, D. R.; Pai, R. Y.; Pace, M. O.; Mathis, R. A. & Bouldin, D. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Progress in the development of gas-impregnated lapped plastic film insulation

Description: A flexible superconducting power transmission cable is under development. The electrical insulation consists of lapped polymeric film tapes impregnated with supercritical helium. Ways of satisfying the many constraints on the material were described. Although the cable is intended for low-temperature operation good electrical and mechanical characteristics are needed at room-temperature. Results are given for both small-sample tests and a model cable fabricated commercially. The results are com… more
Date: January 1, 1977
Creator: Forsyth, E B; McNerney, A J; Muller, A C & Rigby, S J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

WIPP conceptual design report. Addendum F. HVAC systems energy analysis for Waste Isolation Pilot Plant

Description: This report presents the results of a technical and economic analysis of alternative methods of meeting the heating, ventilating, and air conditioning requirements of the Waste Isolation Pilot Plant (WIPP) facilities proposed to be constructed in southeastern New Mexico. This report analyzes a total of ten WIPP structures to determine the most energy and economic efficient means of providing heating, ventilating, and air conditioning services. Additional analyses were performed to determine the… more
Date: April 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of an improved extruded dielectric cable rated 230 kV

Description: Work performed on developing an improved 230 kV extruded solid dielectric cable, the techniques of jointing such cables and the testing of terminations suitable for operation at that voltage level are described. Difficulties were encountered during manufacture in applying the semi-conducting extruded conductor shield. A new higher melt point compound solved the problem. A joint capable of operating at the 230 kV level was developed but showed a deficiency under voltage impulse testing while the… more
Date: May 1, 1977
Creator: Blais, L D; Traut, R T & Bolden, G N
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Superconducting cable system. Summary report, November 1971--August 1975

Description: In the opinion of EPRI and ERDA this 46 month program to develop an ac super-conducting power transmission line was unsuccessful in meeting most of its specific objectives. The technical and economic problems pursued are outlined. Unforeseen difficulties were encountered with power losses in the superconducter, eddy current losses, and heat leak. Fault current testing was never attempted. Major dielectric problems were encountered preventing operation of this system at 138 kV. Ac loss data on s… more
Date: May 1, 1977
Creator: Meyerhoff, R. & Moihara, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

AC Transmission Line Field Measurements

Description: The concern in recent years over the environmental effects of electric and magnetic fields from high voltage transmission lines has also focused attention on the accuracy of measurements of these fields. Electric field meters are discussed in terms of theory of operation, parameters affecting performance, meter performance under field and laboratory conditions, and calibration procedures. The performance and calibration of magnetic field meters is described. (LCL)
Date: November 1, 1977
Creator: Kotter, F. R. & Misakian, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

E-Division semiannual report. Progress report, December 1, 1976--May 30, 1977. [LASL]

Description: Detector research and development are described first. Then, briefer reports are given on research on the following topics: electronic temperature monitoring and identification for livestock, electromagnetic probing (for fracture mapping), fiber optics for downhole instrumentation (for weapons testing), adaptive control applied to HVAC systems, energy environmental simulator, and high-temperature electronics. Engineering support (development projects, program support, instrumentation support) a… more
Date: November 1, 1977
Creator: Kelley, P.A. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design, manufacture, test and delivery of a 230 kV extruded irradiated crosslinked polyethylene cable. Final report

Description: A project was initiated to develop a 230 kV solid dielectric cable for use in underground transmission. The dielectric is to be polyethylene, crosslinked by electron bombardment. Compared to the more conventional chemically crosslinked polyethylene, the irradiated cable is expected to contain less sensitive defects and thus be more suitable for a 230 kV rating. A toroidally shaped diode was developed to provide a uniform radiation dose to a thick-walled coaxial cable. The diode is to receive an… more
Date: January 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Polymeric films for use on superconducting power transmission cables

Description: Research on the development of electrical insulation for a flexible, helium-cooled superconducting cable for a 138 kV underground power transmission system is reported. Solid, polyethylene or polypropylene tapes were found to best satisfy dielectric requirements. The antioxidant was found to be the major source of dielectric loss at 100 Hz and 4.2/sup 0/K, and the selection of the proper type and concentration of antioxidant kept tan delta within design limits. Acceptable values of yield streng… more
Date: January 1, 1978
Creator: Muller, A C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

E-Division semiannual report. Progress report, June 1--December 31, 1977. [Electronics and Instrumentation Division, LASL]

Description: The status of the programs and projects of the Electronics Division is reported for the period of June through December 1977. The presentation is divided into three sections: Research, Engineering Support, and Technical Services. Each of these sections presents the activities and accomplishments of the corresponding branch within the Division. The primary goal of the Research and Development branch is to advance technology for future applications. The primary goal of the Engineering Support bra… more
Date: March 1, 1978
Creator: Kelley, P.A. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Biological effects of high strength electric fields on small laboratory animals. Annual report, April 1977--March 1978

Description: Progress is reported on studies of the biological effects on mice and rats of exposure to 60-Hz electric fields. Results are reported on the effects of 30-day and 60-day exposures to 100 kV/m, 60-Hz electric fields on hematologic values, blood chemistry, and organ weights. With the possible exception of elevated blood platelet counts following 60-day exposures, there were no pathological changes observed in either mice or rats.
Date: April 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Survey and screening of intermediate-size photovoltaic total energy and electric applications

Description: One of the principal objectives of this photovoltaic mission analysis effort has been to identify and evaluate applications for photovoltaic solar energy conversion that could lead to significant contributions to the national energy supply and that would provide attractive opportunities for application experiments aimed at stimulating the adoption of photovoltaic technology. The scope of the study has included applications both for electric-only photovoltaic (PV) systems and for photovoltaic to… more
Date: August 1, 1978
Creator: Rattin, E. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of energy and utility service demands

Description: The collection, analysis, and review of existing data on a community's service requirements are documented. The research focused on the analysis of energy-using activities including both micro activities such as space heating, cooking, lighting, and transportation; and macro activities such as providing shelter, health care, education, etc. The technical report describes the analytical framework developed for community description; describes an indexing system by which a catalog of services can… more
Date: October 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Semiannual report for the period April 1 to September 30, 1978 of work on: (1) superconducting power transmission system development; (2) cable insulation development. Power Transmission Project technical note No. 83

Description: Progress in the development, fabrication and testing of superconductors for HVAC power transmission systems is reported. Information is included on the materials evaluation of superconducting alloys, production of tapes from these alloys, principally Nb/sub 3/Sn cable insulation requirements and development, and the cryogenic equipment used in this research program. (LCL)
Date: November 7, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final report on preliminary dielectric studies. Spir-o-line cable for application at power frequencies

Description: Preliminary studies were made on a unique dielectric system for both flexible and rigid power cable applications. Known as Spir-O-Line, it was developed and is manufactured by Prodelin, Inc. as a high power radio frequency transmisson system, with a service record of several decades. The cable consists of a central conductor continuously supported by six high density polyethylene tubes inside a metal sheath, which operates as a GITL with either nitrogen or SF/sub 6/ as the filling medium. A rou… more
Date: December 4, 1978
Creator: Engelhardt, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

AC superconducting cables

Description: The characteristics and economics of superconducting power transmission cables are discussed, and major research projects on these cables are described. At present Austria is the only European country continuing this research. The USSR has an active program and U.S. efforts are concentrated at the Brookhaven Laboratory which is constructing a 100 m-long 138 kV test facility. (LCL)
Date: January 1, 1979
Creator: Forsyth, E.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Elimination of particle effects in SF/sub 6/ insulated transmission systems. First quarterly report

Description: The purpose of this program is to develop methods and equipment to eliminate the adverse effect of particle contamination in SF/sub 6/-insulated transmission (CGIT) systems, so that the excellent dielectric properties of SF/sub 6/ can be fully exploited. Presently, CGIT systems are operated at about 10% of the dielectric strength capability of the SF/sub 6/ gas. The program includes theoretical and experimental evaluation of concepts, optimization and verification studies in CGIT systems, and r… more
Date: January 1, 1979
Creator: Dale, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field validation of cable monitoring and rating system (CMARS) laboratory model. First semi-annual report, 1 November 1978-30 April 1979

Description: The goal of this project is to quantitatively validate the Cable Monitoring and Rating System (CMARS) software and associated hardware as applied to commercially operating underground transmission systems which are representative of the bulk of this type of system used in the USA. In the course of the project, it is expected that improvements and refinements of the CMARS will occur resulting in improved accuracy, flexibility and predictive capability for CMARS. The circuits to be utilized are e… more
Date: January 1, 1979
Creator: Englehardt, J.; O'Neill, D.; Orifice, D. & Patton, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Superconducting magnetic energy storage for electric power system dynamic stabilization

Description: A Superconducting Magnetic Energy Storage (SMES) system is being developed at the Los Alamos Scientific Laboratory (LASL) for a dynamic stabilizer to be installed in the Bonneville Power Administration (BPA) power system at Tacoma, Washington, by 1982. This unit will be an alternate stabilization method to the dc modulator now used to stabilize the 900 mile, ac intertie between BPA and Southern California. The generation control systems' response to the constantly occuring, small-load and volta… more
Date: January 1, 1979
Creator: Turner, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Survey of transmission line corridors. [Data on delays in transmission line construction]

Description: The intent of this study is to determine the extent of delays experienced in planning and constructing transmission lines in the continental United States. The reasons for the delays are identified for each line studied and their effect on the total electrical system is sought. Data was collected for 136 different lines either recently built or currently under study. Statistics were developed for each line in several categories and comparisons of lines delayed were made by company, area served … more
Date: January 5, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen