... Accession Number : ADD120754. Title : Hydrogen Absorption of Titanium Heat Exchanger Tubes in MSF Desalination Plants,. ...
DTIC Science & Technology
The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.
Energy Citations Database
DOEpatents
A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the ...
DOE Information Bridge
Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium.
A method of defrosting a multiple effect absorption refrigeration and heating system having means for switching a refrigerant flow from a second heat exchanger operating as a condenser in the heating mode to a first heat exchanger operating as an ...
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)
... AND THEORETICAL INVESTIGATIONS OF RADIATIVE HEAT EXCHANGE IN THE ... emittance and absorptance of the basic substances within the ...
A spray generator for an absorption refrigeration system that includes a heat exchanger comprised of a multiplicity of variably spaced heat exchange tubes. The tubes are spaced close together near the top of the heat exchanger and spaced more widely ...
In pure heat transfer, specifications of effectiveness, fluid properties, and flows enable calculation of the heat exchanger area. In the case of falling film absorption, a simultaneous heat and mass transfer governs the performance of the absorber. The e...
National Technical Information Service (NTIS)
A schematic of the solar energy system and the HVAC equipment is shown. A paraffinic oil is circulated through the collector array and exchanges heat to water in a tube or shell heat exchanger. Hot water is pumped to either a Rankine cycle or absorption unit. The two systems are compared. (MOW)
Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium. A ...
An analysis of alternative approaches to the use of solar energy for heating applications is presented. Three heat pump configurations are considered as alternatives to direct heat exchange. These are two configurations of a vapor compression heat pump driven by a solar-powered Rankine engine ...
Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use, as the heat transfer medium, the working fluid of the absorption system taken from the ...
A gas-to-liquid heat exchanger system which transfers heat from a gas, generally the combustion gas of a direct-fired generator of an absorption machine, to a liquid, generally an absorbent solution. The heat exchanger system is in a counterflow fluid arrangement which ...
Heat Rejection. Fins. Vacuum and. Helium Duct. Heat Absorption ... Successful test of 12000W Full-Scale Heat Engine. Heat Exchanger Hot-end ... To create a complete system design with the multi-stage refrigerator integrated into ...
NASA Website
The object of the research work was to demonstrate that a water source heat pump could be used with an earth-coupled heat exchanger which was buried in an absorption field of a domestic sewage disposal system to provide the heating and cooling requirement...
Numerous embodiments and related methods for generator-absorber heat exchange (GAX) are disclosed, particularly for absorption heat pump systems. Such embodiments and related methods use the working solution of the absorption system for the heat transfer medium where the ...
An air conditioning system is described utilizing low temperature heating sources of the environment to maximize the heat coefficient of performance by conserving subterranean heat, atmospheric heat, solar heat, and auxiliary heat sources in combination with a ...
A solar energy collecting system comprising a reflective collector including a pair of parabolic portions which focus solar energy on to a pair of spaced focal lines coincident with the sidewalls of a heat exchange tube. The heat exchange tube is transparent to the solar energy and includes interiorly thereof an ...
A closed loop solar collector system includes a linear concentrating parabolic reflector, a linear vaporizer tube horizontally aligned along the focal line of the parabolic reflector, and a fluid metering assembly attached to the input end of the vaporizer tube for precisely metering a quantity of a vaporizable heat transfer fluid from a supply tank to the vaporizer tube. ...
A triple loop heat exchanger for an absorption refrigeration system is disclosed. The triple loop heat exchanger comprises portions of a strong solution line for conducting relatively hot, strong solution from a generator to a solution heat exchanger of ...
A process for the integration of a chemical absorption separation of oxygen and nitrogen from air with a combustion process is set forth wherein excess temperature availability from the combustion process is more effectively utilized to desorb oxygen product from the absorbent and then the sensible heat and absorption reaction ...
The response of the magnetic and crystal structure of Gd5Si4 to both �isothermal� and �thermo-mechanical� process is investigated by the dispersion exchange fluctuation, which can be the cause of the compound's metastability. The X-ray diffraction DTA, SEM and magnetization at room temperature are measured to explore the effect of annealing process (latent ...
NASA Astrophysics Data System (ADS)
The development of energy efficient, thermally activated heat pumps for heating and cooling is reported. A breadboard system with a 32.5%-BHP-efficient linear engine in the final phase of steady state was tested. The absorption heat pump advanced cycle program is in progress. Analysis confirms the level of ...
An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the ...
