203 Matching Results

Search Results

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

Thin polymer icemaker development and test program

Description: We have constructed and tested a small device to produce ice in ice/water mixtures using a cold fluid as the heat sink. The device is a flexible heat exchanger constructed from a thin film of a suitable polymer. When filled with circulating liquid coolant the heat exchanger consists of an inflated series of parallel tubes; ice forms on the outside in complementary half cylinders. When the circulation is cut off, gravity drains the coolant and the static head of the water bath crushes the tubes,… more
Date: August 1, 1991
Creator: Leigh, R.W. (Pratt Inst., Brooklyn, NY (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Report of the Workshop on Arctic Oil and Gas Recovery Held at Sandia National Laboratories, Albuquerque, New Mexico, June 30-July 2, 1980

Description: This report is the result of a workshop on Arctic offshore oil and gas recovery, held at Sandia National Laboratories Albuquerque, New Mexico, on June 30-July 2, 1980. Research priorities for the technology related to Arctic offshore oil and gas production were defined. The workshop was preceded by a report entitled, A Review of Technology for Arctic Offshore Oil and Gas Recovery, authored by Dr. W. M. Sackinger. The mission of the workshop was to identify research priorities without considerin… more
Date: September 1, 1980
Creator: Sackinger, W. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy conservation in ice skating rinks

Description: An economic and energy analysis of ice rinks was made to examine the areas in which energy could be profitably conserved. The areas where new equipment could make a major reduction in energy use are: the use of waste heat for space heating, the installation of a low emissivity false ceiling to reduce radiant heat, the use of a load cycling controller to reduce refrigeration costs, and the installation of more efficient lighting systems. Changes in rink operating procedure that could cut energy … more
Date: January 1, 1980
Creator: Dietrich, B.K. & McAvoy, T.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Calmac Ice Storage Test Report

Description: The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. Calmac provided a storage tank equipped with coils designed for use with a secondary fluid system. The Calmac ice storage system was tested over a wide range of operating conditions. Measured system performance during charging was similar to that reported by the manufacturer. Both the measured average and minimum brine temperatures were in close agreement with Calmac's literature values, and the ability to … more
Date: August 1, 1991
Creator: Stovall, T. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of the surface structures of molecular crystals and of adsorbed molecular monolayers on the (111) crystal faces of platinum and silver by low-energy electron diffraction

Description: The structures of molecular crystal surfaces were investigated for the first time by the use of low-energy electron diffraction (LEED). The experimental results from a variety of molecular crystals were examined and compared as a first step towards understanding the properties of these surfaces on a microscopic level. The method of sample preparation employed, vapor deposition onto metal single-crystal substrates at low temperatures in ultrahigh vacuum, allowed concurrent study of the structure… more
Date: January 1, 1977
Creator: Firment, L.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impact of advanced fluids on costs of district cooling systems

Description: Three alternate fluids, ice-water slurry, friction reduction additive and the combination of them, have been compared for use in District Cooling Systems (DCS). The effect of the fluids on cost and cooling capacities were considered for the two cases of new and existing DCS separately. Two criteria were used in comparisons among fluids in each case: constant pumping power which allows for the most benefit, and constant velocity which is more practical consideration. An economic assessment for a… more
Date: January 1, 1992
Creator: Choi, U.S. (Argonne National Lab., IL (United States)); France, D.M. & Knodel, B.D. (Argonne National Lab., IL (United States) Illinois Univ., Chicago, IL (United States). Dept. of Mechanical Engineering)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High energy halogen atom reactions activated by nuclear transformations. Progress report, February 15, 1979-February 14, 1980

Description: The program consists of six interrelated areas: (1) Reactions of iodine with alkenes and alkynes activated by radiative neutron capture and isomeric transition in low pressure gaseous systems employing additives and rare gas moderators, high pressure, and liquid systems. Special attention was given to the reactivity of excited complex formation and structural effects of electrophilic iodine attack on various pi-bond systems. (2) The gas-to-condensed phase transition in halogen high energy chemi… more
Date: February 1, 1980
Creator: Rack, E.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ice slurry cooling development and field testing

Description: A new advanced cooling technology collaborative program is underway involving Argonne National Laboratory (ANL), Northern States Power (NSP) and the Electric Power Research Institute (EPRI). The program will conduct field tests of an ice slurry distributed load network cooling concept at a Northern States Power utility service center to further develop and prove the technology and to facilitate technology transfer to the private sector. The program will further develop at Argonne National Labor… more
Date: January 1, 1992
Creator: Kasza, K.E. (Argonne National Lab., IL (United States)); Hietala, J. (Northern States Power Co., Minneapolis, MN (United States)); Wendland, R.D. (Electric Power Research Inst., Palo Alto, CA (United States)) & Collins, F. (USDOE, Washington, DC (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermal energy storage technical progress report, April 1990--March 1991

Description: The Department of Energy (DOE) is supporting development of thermal energy storage (TES) as a means of efficiently coupling energy supplies to variable heating or cooling demands. Uses of TES include electrical demand-side management in buildings and industry, extending the utilization of renewable energy resources such as solar, and recovery of waste heat from periodic industrial processes. Technical progress to develop TES for specific diurnal and industrial applications under Oak Ridge Natio… more
Date: March 1, 1992
Creator: Tomlinson, J.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of synfuel spill cleanup options

Description: Existing petroleum-spill cleanup technologies are reviewed and their limitations, should they be used to mitigate the effects of synfuels spills, are discussed. The six subsections of this report address the following program goals: synfuels production estimates to the year 2000; possible sources of synfuel spills and volumes of spilled fuel to the year 2000; hazards of synfuels spills; assessment of existing spill cleanup technologies for oil spills; assessment of cleanup technologies for synf… more
Date: April 1, 1982
Creator: Petty, S.E.; Wakamiya, W.; English, C.J.; Strand, J.A. & Mahlum, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annual Sea Ice. An Air-Sea Gas Exchange Moderator

Description: Arctic annual sea ice, particularly when it is relatively warm (> -15/sup 0/C) permits significant gas exchange between the sea and air throughout the entire year. Sea ice, particularly annual sea ice, differs from freshwater ice with respect to its permeability to gases. The presence of brine allows for significant air-sea-ice exchange of CO/sub 2/ throughout the winter, which may significantly affect the global carbon dioxide balance. Other trace gases are also noted to be enriched in sea ice… more
Date: January 1, 1982
Creator: Gosink, T. A. & Kelley, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Carbon dioxide effects research and assessment program. Environmental and societal consequences of a possible CO/sub 2/-induced climate change: volume II, part I. Response of the West Antarctic ice sheet to CO/sub 2/-induced climatic warming

Description: The paper proposes a research plan to deal with the question of what the response of the West Antarctic Ice Sheet would be to a rise in global temperatures caused by an anthropogenic CO/sub 2/ buildup in the atmosphere. The plan is designed to answer the following questions: (1) how fast is the ice mass changing now, and why; (2) how will the boundary conditions that affect the ice sheet respond to an atmospheric temperature change and how are those boundary conditions changing now; (3) what wi… more
Date: April 1, 1982
Creator: Bentley, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Arctic Troposphere Carbon Dioxide: Low-Altitude Aircraft Sampling

Description: Data from low altitude (<4500 m) aircraft sampling for CO/sub 2/ in the arctic atmosphere are presented. The data cover the period from late spring to late summer when environmental changes at the tundra and sea ice are most pronounced. Results of the data analysis show the effect of regional sources and sinks for CO/sub 2/ on the lower troposphere. The annual ice and open water zones of the Arctic Ocean covered by the flights transects appear to act as a potential sink for carbon dioxide.
Date: January 1, 1982
Creator: Gosink, Thomas A. & Kelley, John J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Temporal and spatial trends in the chemistry of acidified lakes under ice cover

Description: When preparing materials budgets for watersheds containing lakes, the spatial and temporal interchange between large compartments within the whole system must be considered. This paper addresses the lakes of the Integrated Lake-Watershed Acidification Study (ILWAS) and their role in our mass balance calculations for the period of winter stratification of 1978-1979, and presents data on lake metabolism.
Date: March 1, 1980
Creator: Hendrey, G. R.; Galloway, J. N. & Schofield, C. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sources and Sinks of Carbon Dioxide in the Arctic Regions

Description: The data base required to adequately ascertain seasonal source and sink strengths in the arctic regions is difficult to obtain. However, there are now a reasonable quantity of data for this polar region to estimate sources and sinks within the Arctic which may contribute significantly to the annual tropospheric CO/sub 2/ concentration fluctuation. The sea-ice-air and the sea-air interfaces account for most of the contribution to the sources and sinks for carbon dioxide. Although the arctic and … more
Date: January 1, 1982
Creator: Gosink, T. A. & Kelley, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of latent heat on frost penetration in moist soil

Description: Substantial differences have been found between measured and computed heat losses from a large in-ground thermal storage tank used for annual cycle heat storage. One suspected source of error in the computation was the neglect of the latent heat effects in the moist soil and efforts have been made to examine these. One of these effects, that was due to freezing and thawing of the soil moisture is discussed, and the results of some simulations of the effect in a numerical model are presented.
Date: May 1, 1979
Creator: Hopper, F. C. & McClenahan, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide in Arctic and Subarctic Regions. Progress Report for FY 82

Description: The objectives are to identify and quantify the sources and sinks of carbon dioxide in the polar regions. Results indicate the Arctic is a net annual sink of as much as 1.1 x 10/sup 15/ g of CO/sub 2/, that natural sources and sinks within the Arcticc are the cause of up to 20 to 40% of the observed large annual excursions of atmospheric CO/sub 2/ there, that the Arcti is exchanging more than 2 x 10/sup 15/ g of CO/sub 2/ throughout the entire year, and that the porous annual sea ice will allow… more
Date: February 1, 1982
Creator: Gosink, T. A. & Kelly, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance evaluation of a selected three-ton air-to-air heat pump in the heating mode

Description: An air-to-air split system residential heat pump of nominal three-ton capacity was instrumented and tested in the heating mode under laboratory conditions. This was the second of a planned series of experiments to obtain a data base of system and component performance for heat pumps. The system was evaluated under both steady-state and frosting-defrosting conditions; sensitivity of the system performance to variations in the refrigerant charge was measured. From the steady-state tests, the heat… more
Date: January 1, 1980
Creator: Domingorena, A.A. & Ball, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Third international workshop on ice storage for cooling applications

Description: The third international workshop on ice storage for cooling applications which was informal and interactive in nature, was open to persons interested in all ice-growing technologies and in ice storage, both seasonal and diurnal. Presentations were made on some 20 topics, ranging from freezers in Alaska to ice cooling of commercial jet aircraft. Workshop tours included visits to ice-storage systems at Commonwealth Edison's facilities in Bolingbrook and Des Plaines Valley, the A.C. Neilsen builin… more
Date: April 1, 1986
Creator: Gorski, A.J. (comp.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ice targets

Description: This report presents a description of ice targets that were constructed for research work at the High Resolution Spectrometer (HRS) and at the Energetic Pion Channel and Spectrometer (EPICS). Reasons for using these ice targets and the instructions for their construction are given. Results of research using ice targets will be published at a later date.
Date: December 1, 1979
Creator: Pacheco, C.; Stark, C.; Tanaka, N.; Hodgkins, D.; Barnhart, J. & Kosty, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Detection of single atoms by resonance ionization spectroscopy

Description: Rutherford's idea for counting individual atoms can, in principle, be implemented for nearly any type of atom, whether stable or radioactive, by using methods of resonance ionization. With the RIS technique, a laser is tuned to a wavelength which will promote a valence electron in a Z-selected atom to an excited level. Additional resonance or nonresonance photoabsorption steps are used to achieve nearly 100% ionization efficiencies. Hence, the RIS process can be saturated for the Z-selected ato… more
Date: January 1, 1986
Creator: Hurst, G.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen