A detailed analysis of the solar absorption cooling process as represented by the NSDN system is presented. There is comprehensive data on eight solar cooling systems in the NSDN. Among these eight systems solar cooling by an ...
National Technical Information Service (NTIS)
This report provides a detailed analysis of solar absorption cooling and solar Rankine cooling processes as represented by the National Solar Data Network (NSDN) systems. There is comprehensive data on four absorption chiller cooling systems and one ...
This report provides a detailed analysis of solar absorption cooling and solar Rankine cooling processes as represented by the National Solar Data Network (NSDN) systems. Five solar cooling systems were monitored in 1982; four of these have absorption ...
The systems approach to heating and cooling is considered in terms of the collectors, heat storage, heat pumps, air cooling absorption units, heat exchangers, circulating devices, and controls. (WDM)
Energy Citations Database
... Title : THE STUDY AND EVALUATION OF ABSORPTION-BASED COOLING SYSTEMS FOR USE IN CIVIL DEFENSE SHELTERS. ...
DTIC Science & Technology
A short discussion is given on the difficulties inherent in solar absorption air conditioning. Passive heating and cooling systems, nocturnal radiative cooling, and backup systems are briefly mentioned. (WDM)
Absorption chillers are gaining global acceptance as quality comfort cooling systems. These machines are the central chilling plants and the supply for cotnfort cooling for many large commercial buildings. Virtually all absorption chillers use lithium bro...
The report analyses how production of district cooling is affected by the choice of cooling method and refrigerant. Three different cooling methods are analyzed, i.e. the compressor, absorption, and cold air machines. Performance calculations and quality ...
A comparative analysis has been performed to compare the cooling and dehumidification performance of future ventilation mode desiccant systems, proposed advanced absorption systems, and conventional vapor compression systems. A common framework has been developed for direct comparison of these ...
fuel cells. Cascading desiccant cooling with another compatible technology, such as absorption cooling, further enhances the overall system fuel efficiency and utilization. In...
National Renewable Energy Laboratory (NREL)
The discussion covers the variables that can influence the proper choice of the solar energy system components for the cooling of buildings.
//www.ornl.gov/sci/ees/etsd/btric/ Heating and Cooling Equipment Vapor Compression Absorption Desiccants Building Cooling, Heating, and Power Thermal Engineering Envelope Systems...
Science.gov Websites
A review of the current technology and achievements in the research and development of solar cooling systems is presented. Brief discussions on Rankine cycle engines, absorption refrigeration cycles, and open-cycle absorption systems are included.
The reaction of hydrogen isotopes with the storage bed hydride material is exothermic during absorption and endothermic during desorption. Therefore, storage bed operation requires a cooling system to remove heat during absorption, and a heating system to...
A three ton lithium bromide absorption water chiller was tested for a number of conditions involving
NASA Technical Reports Server (NTRS)
Solar absorption cooling systems are viewed as potential alternatives to fossil-fuel-based conventional cooling systems. This view is investigated in this paper from the point of view of the energy balance of solar absorption and conventional systems. ...
NASA Astrophysics Data System (ADS)
After a discussion of summer air conditioning requirements in the United States, active, hybrid, and passive cooling systems are defined. Active processes and systems include absorption, Rankine cycle, and a small variety of miscellaneous systems. The hybrid solar cooling ...
The current effort concentrates on design requirements of thermal storage subsystems for active solar cooling systems. The use of thermal storage with respect to absorption, Rankine, and desiccant cooling technologies is examined.
This article will cover operating and maintenance considerations for gas cooling equipment with the primary focus on absorption chillers; including discussion of absorption cycles, the importance of maintaining vacuum, scheduled maintenance, controlling the rate of internal corrosion and purge systems.
A comprehensive survey of the current state of the absorption cooling technology has been conducted. This survey discusses the basic and applied absorption cooling/heating technology, analyses the current state of the art including the discussion of limitations and possible solutions, identifies areas where ...
The chemical composition of a 'best' absorption refrigerant system is identified, and those properties of the system necessary to design hot water operated, air cooled chilling equipment are determined. Air cooled chillers from single family residential sizes into the commercial rooftop size ...
This is the Final Report for two solar cooling projects under this Cooperative Agreement. The first solar cooling project is a roof-integrated solar cooling and heating system, called the Power Roof(trademark), which began operation in Raleigh, North Caro...
District cooling is a hot topic currently due to its role to improve CHP plants efficiency and CO2 emission reduction. Especially DH energy driven absorption cooling can balance the production of heat and power in CHP plants. This thesis consists of the m...
A cooling system is described having a boiler, a heat source for the boiler including a burner, an absorption machine having a generator section and an absorber section, a steam trap for the generator section of the absorption machine, a condensate tank with a vent line to atmosphere and work to be heated. The ...
This report gives a short introduction to the principles of absorption refrigeration plants. A measuring program for a large lithium bromide-water absorption refrigeration plant has been conducted during the summer 1987 at Herlev Hospital. The plant is dr...
A comparative analysis has been performed to compare the cooling and dehumidification performance of future ventilation-mode desiccant systems, proposed advanced absorption systems, and conventional vapor compression systems. A common framework has been developed for direct comparison of these ...
A 3-ton lithium bromide absorption water chiller was tested for a number of conditions involving hot-water input, chilled water, and the cooling water. The primary influences on chiller capacity were the hot water inlet temperature and the cooling water inlet temperature. One combination of these two parameters extended the output to ...
Requirements for cooling are related to the need to be able to maintain foodstuffs in good condition with the aid of refrigeration and the desirability to provide a comfortable indoor environment by air conditioning. The representation of the desired conditions in a room by a point on a psychrometric chart is considered together with processes of sensible ...
The Second Law of Thermodynamics is used to analyze solar powered absorption cooling cycles and systems. Irreversibility is used as a figure of merit for components and cycles. The irreversibility of individual components is determined for several solar-powered absorption cycles and systems. ...
Description of the design and testing of a residential solar cooling system consisting of a solar energy collector and heat conversion assembly, an absorption-diffusion cooling assembly for daytime use, and an absorption-type cooling unit for night use. Tables list ...
Solar cooling by an absorption chiller is not a cost effective method to use solar heat. This statement is substantiated by careful analysis of each subsystem and equipment component. Good designs and operating procedures are identified. The problems which reduce cost effectiveness are pointed out. There are specific suggestions for improvements. Finally, ...
The characteristics and limitations of four types of solar cooling systems for air conditioning of buildings are described. Absorption cooling, desiccant cooling, heat-engine-driven mechanical cooling, and photoelectric-powered mechanical cooling are ...
Supporting information is presented on: properties of a chemical system for solar fired, air-cooled absorption equipment, air-side performance of a one-inch tube, absorber plate-fin coil, listings of the programs used for simulation and data reduction, and evaluation of the Carrier three-tone chiller in an integrated heating and ...
Improved performance of solar cooling systems using the lithium bromide water absorption cycle is investigated. Included are computer simulations of a solar-cooled house, analyses and measurements of heat transfer rates in absorption system components, and design and ...
solar cooling systems, solar-thermal collectors convert solar energy into heat for absorption chillers or desiccant regeneration. * In solar lighting systems, sunlight is...
The status of absorption cycle solar air conditioning and the Rankine cycle solar cooling system is reviewed. Vapor jet ejector chillers, solar pond based cooling, and photovoltaic compression air conditioning are also briefly discussed. Hybrid solar cooling by direct and indirect evaporative ...
The cooling of buildings is discussed and possible systems utilizing solar energy for this end are considered. The science of psychrometrics, which deals with the thermal properties of moist air, is introduced, and the three major processes for conditioning the atmosphere of a space, sensible cooling, cooling and ...
The report describes the design, modelling and performance of an active solar cooling system in Northern Italy. Various aspects related with active solar cooling, like energy storage, room comfort, modelling and the LiBr - H2O absorption cycle are discuss...
Solar winter heating and cooling are considered the most promising prospects of solar energy utilization in the near future. The paper presents the feasibility of solar cooling and heating using the solar absorption system. Two mixtures in wide use for absorption cooling ...
An investigation of the feasibility of using a district heating system to drive absorption chillers incorporated in air conditioning installations. Calculations proved the possibility of achieving cooling of the heat source by 15-18 deg. C when counter fl...
The hybrid refrigeration/sorption concept is a technically feasible approach to solar cooling which has not yet been systematically evaluated. Various system configurations are possible, each with advantages and disadvantages relative to the others, and with respect to solar cooling systems based on the individual ...
Results from the University of Texas at Arlington/Solar Energy Research Facility (UTA/SERF) analytical and experimental study on residential solar heating and cooling systems are given. A description of the 145-sq m solar residence, its basic components, operation, and controls of various combinations of system components is presented. ...
If residential solar heating and cooling is to be universally usable across the country, air-cooled solar air conditioners must be developed in addition to present water-cooled systems. Absorption cycles that are suitable for air-cooled operation with solar heat at ...
