The book presents the fundamental principles, systems, and practices of refrigeration. Emphasizing energy conservation, it offers applications of the refrigeration systems and equipment. Topics covered include: physical principles; the vapor compression refrigeration ...
Energy Citations Database
A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only ...
This book is a fundamental text on refrigeration principles, equipment, and systems. Energy utilization and conservation are stressed. Extensive use is made of tables, charts, and worked-out examples. Contents, abridged: Physical principles. Heat transfer in refrigeration: evaporators. Absorption ...
The determination of properties of zeolite/refrigerant combinations of solar refrigeration systems are reviewed in this final report. The US DOE has funded several studies aimed at identifying potential rerigerant/absorption pairs for solar cooling applic...
National Technical Information Service (NTIS)
Because the absorption refrigeration system uses the Lithium bromide- water solution as refrigerant, it is profitable for the environment that human beings are living since the values of ODP and GWP of the refrigerant almost are zero. However, the low COP of the absorption ...
E-print Network
The bibliography contains citations of selected patents concerning the design and application of absorption refrigeration systems. Citations cover refrigeration, cooling/heating, and chilling devices. Combination heat pump/absorption and mechanical/absorption ...
Because the severe conditions imposed by ambient temperatures on solar refrigeration equipment in the tropics limit the choice of an absorption system, the thermokinetic characteristics of a calcium chloride/ammonia absorption cycle were examined. The refrigeration equipment employed works in ...
NASA Astrophysics Data System (ADS)
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...
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 cooling, cooling and ...
An air-cooled, vertical tube absorber for an absorption refrigeration system is disclosed. Strong absorbent solution is supplied to the top of the absorber and refrigerant vapor is supplied to the bottom of the absorber to create a direct counterflow of refrigerant vapor and absorbent solution ...
DOEpatents
The thermodynamic properties of the R22- N,N-dimethylformamide system and the R22- isobuthylacetate system were measured in order to decide whether or not these mixtures were suited for absorption refrigeration. The specific gravity, the viscosity, the su...
Solar-Powered Refrigeration can help people in the developing countries to reduce a tremendous loss of foodstuffs because of lacking preservation facilities. Also for the preservation of medical supplies, especially vaccine, refrigeration is urgently need...
An absorption refrigeration system has an intermediate temperature desorber-resorber pair. A valve between the desorber-resorber pair is modulated to control the capacity for load matching.
The method described is for the removal of oils accumulating in a liquid refrigerant and for returning the refrigerant system. This method is particularly applicable to the process of recovering natural gasoline from natural gas by refrigeration and absorption. A small stream of the liquid ...
A Vapor Absorption Refrigeration (VAR) System is similar to a Vapor Compression Refrigeration (VCR) System. In both systems the required refrigeration is provided by refrigerants vaporizing in the evaporator. However, in the VAR ...
Absorption refrigeration systems are one of the oldest systems available. The fundamentals of absorption refrigeration were formulated about 1777, and the first successful absorption machine was developed in 1850. The first U.S. patent for an ...
An absorption refrigeration and/or heating system is described, comprising: a desorber which absorbs heat and a high relative pressure vaporizes a first volume of refrigerant from a second volume of strong solution leaving a third volume of weak solution; a condenser which releases and condenses the vapor ...
Work done in attempting to qualify absorption refrigeration systems based on refrigerants with intermediate latent heats of vaporization is summarized. In practice, these comprise methanol, ammonia, and methylamine. A wide variety of organic substances, s...
An air conditioning system making use of waste heat is described comprising a compound absorption refrigeration machine and absorption type heat pump for both cooling and heating. The refrigeration machine and the heat pump are connected in parallel to the load to obtain hot water for utility ...
An absorption refrigeration system is disclosed having a primary condenser--generator unit powered by solar energy, or any other suitable relatively low temperature energy source. A secondary condenser--generator unit is operatively connected to the primary unit. The secondary unit is powered by a refrigerant ...
During the compatibility study of 10 pure refrigerants with 24 motor materials, it was observed that the greatest damage to the insulation system was caused by absorption of refrigerant followed by rapid desorption. The observed effects were blisters, cracking, internal bubbles and delamination. Measured results ...
DOE Information Bridge
A triple effect absorption refrigeration system is provided with a double-condenser coupling and a parallel or series circuit for feeding the refrigerant-containing absorbent solution through the high, medium, and low temperature generators utilized in the triple-effect system. The high ...
Energy Concepts has developed an absorption-augmented system as a cost-effective means of achieving more cooling capacity with a substantial reduction in energy consumption and greenhouse gas emissions for industrial refrigeration. It cuts fuel consumption by 30% by combining an internal combustion engine with a mechanical compression ...
... evaporator coils, reciprocating or absorption chillers, refrigerant ... of the tank and other complications. ... The potable water system, wastewater system ...
DTIC Science & Technology
A dual circuit absorption refrigeration system comprising a high temperature single-effect refrigeration loop and a lower temperature double-effect refrigeration loop separate from one another and provided with a double-condenser coupling therebetween. The high temperature condenser of the ...
The characters of the couple CaCl/sub 2/-NH/sub 3/ are examined to employ this binary compound for solar refrigeration; the severe conditions imposed by the daily and nocturnal temperatures in tropical zones limit the choice of absorption systems. The solar refrigerator consists of a generator, a condenser and an ...
The Intermittent Solar Ammonia Absorption Cycle (ISAAC) refrigerator is a solar thermal technology which provides low cost, efficient, reliable ice-making to areas without ready access to electricity. An ISAAC refrigeration system consists of a compound p...
A heat exchanger bypass system for an absorption refrigeration system is disclosed. The bypass system operates to pass strong solution from the generator around the heat exchanger to the absorber of the absorption refrigeration ...
G: REFRIGERATION AND HEAT PUMP SYSTEMS BASED ON HE 11. VORTEX CONTROL. 57. APP. H: SPACE CRYOGENICS COMPONENTS BASED ON .... L, is the square root of the Darcy permeability. Insertion of ...... the absorption of the refrigeration load. ...
NASA Website
A compact hydride absorption refrigeration system with few moving parts for 10 Kelvin operation is disclosed and comprises liquid hydrogen producing means in combination with means for solidifying and subliming the liquid hydrogen produced. The liquid hyd...
Ammonia has been used as a refrigerant for more than 100 years in absorption as well as compression systems, and a tremendous amount of practical experience exists. Today it is applied largely in heavy industrial plant with reciprocating or screw compress...
A method of using solar energy to drive a jet refrigeration system is described and analyzed. A new technique is presented in the form of a performance nomogram combining the energy and momentum equations to determine the performance characteristics. A numerical example, using water as the working fluid, is given to illustrate the nomogram procedure. The ...
The article describes and analyzes a method of using solar energy to drive a jet refrigeration system. A new technique is presented in the form of a performance nomogram combining the energy and momentum equations to determine the performance characteristics. A numerical example, using water as the working fluid, is given to illustrate the nomogram ...
Air conditioning by absorption refrigeration that utilizes heat recovered from engines and from incineration of solid waste is a utility service that can be included in a MIUS. This report reviews the suitability of lithium bromide--water absorption refrigeration for such an application. Types and sizes ...
In combination with the ground vehicle a powered by a waste heat generating electric motor 16, a cooling system 10 including a generator 17 for driving off refrigerant vapor from a strong refrigerant-absorbant solution, including a solar collector 12, an air-cooled condenser 30 connected with the generator for converting the ...
Absorption systems have two major applications: first, in refrigeration and air conditioning engineering, where the are used for absorption refrigeration machines and heat pumps, and secondly in the chemical industry, where they are used in particular for...
An absorption refrigeration system utilizing a low temperature desorber and intermediate temperature resorber. The system operates at three temperatures and three pressures to increase the efficiency of the system and is capable of utilizing a lower generator temperature than previously used.
This paper proposes a novel latent heat storage which is applicable to solar space heating systems. The device is similar to an absorption refrigerator and stores liquid refrigerant which is subsequently evaporated to release the latent heat. It will recover the energy in a heat pump mode for application to solar ...
For the Central American Health Clinic Project initiated in 1986, Sandia National Laboratories and the Florida Solar Energy Center recognized the need for a test and evaluation program for vaccine refrigeration systems. At the Florida Solar Energy Center, side-by-side testing of three photovoltaic powered vaccine refrigerators began in ...
Projected performance requirements for cryogenic spacecraft sensor cooling systems which demand higher reliability and longer lifetimes are outlined. The gas/solid sorption refrigerator is viewed as a potential solution to cryogenic cooling needs. A software model of an entire gas sorption refrigerator system was ...
technologies including thermoacoustics, metal hydride heat pumps, zeolite systems, absorption refrigeration, and thermoelectrics. A major part of our research focuses on the...
National Renewable Energy Laboratory (NREL)
technologies including thermoacoustics, metal hydride heat pumps, zeolite systems, absorption refrigeration, and thermoelectrics. Thermoacoustic Technique A promising device...
