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2 edition of performance study of aqueous salt systems in an absorption heat pump. found in the catalog.

performance study of aqueous salt systems in an absorption heat pump.

Dilip Vinayak Paranjape

performance study of aqueous salt systems in an absorption heat pump.

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Published by University of Salford in Salford .
Written in English


Edition Notes

MSc thesis, Chemical and Gas Engineering.

ID Numbers
Open LibraryOL19687358M

Start studying Physiology: GI Absorption of Water, Salts & Organic Solutes. Learn vocabulary, terms, and more with flashcards, games, and other study tools. @article{osti_, title = {Numerical fits of the properties of lithium-bromide water solutions}, author = {Patterson, M R and Perez-Blanco, H}, abstractNote = {The modelling and design of advanced absorption cycles calls for numerical fits of the working fluids' properties. The numerical fits can be readily implemented in computers. Recently, a worldwide search of available properties of. In the ammonia-water absorption refrigeration system, ammonia works as the refrigerant and water works as the absorbent. When ammonia leaves the generator in the vaporized state some particles of water vapor are also carried with it, and these are removed in the analyzer and the rectifier. The components like absorber, and generator perform the regular functions. Accurate and extensive thermodynamic (heat capacity, heat of mixing, vapor pressure, solubility, density, and surface tension) and transport (viscosity) properties of working fluids are required for the research and reliable design of absorption refrigeration and heat pump by:

Performance of film absorbers under the effect of a contaminant non-absorbable gas Performance of film absorbers under the effect of a contaminant non-absorbable gas Sabir, H.M; Eames, I.W This paper presents a method of calculating the effects of the presence of non-absorbable gases on the performance of the absorber of vapour absorption refrigeration systems.


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performance study of aqueous salt systems in an absorption heat pump. by Dilip Vinayak Paranjape Download PDF EPUB FB2

For this new system, the general working scheme, the thermodynamic design data, its performance as a heat pump machine and a comparison with the ammonia-water absorption heat pump are presented. The research activity concerning this work has been supported by ENEA (Italy).Cited by: 2.

Closed-cycle absorption heat pump 3. Open-cycle absorption heat pump. As working fluid. Lithium Bromide-Water solutions were employed. The research was continued by Grossman and Perez-Bianco (31 with conceptual design and performance analysis.

Of the three types of. Comparative performance data have been obtained for single-salt systems. Lithium halide salt systems in absorption heat-pumps I 11 The use of double-salt systems can (1) optimise the interaction between the working fluid and the absorbent, and (2) rectify some deficiencies in the physical properties existing in single systems.

REFERENCES by: 4. Economic analyses of solar collectors, for optimizing generator temperatures in the absorption cycle using aqueous solutions of LiBr, LiBr–ZnBr 2, LiBr–ZnBr 2 LiCl, and LiBr–ZnCl 2 –CaBr 2 salts, have been carried out for a wide range of the operating conditions.

Ordinary collectors with two glass covers and evacuated-tubular collectors have been selected as the sources of energy for providing hot liquid Cited by: 4. In the first part of this study, the performance ofthe Absorption Heat Pump (AFIP) with water-sulfuric acid and water-magnesium chloride as two new refrigerant-absorbent fluid pairs was investigated.

With the experimental setup, performance of the micro absorption heat pump system under various condensation temperatures and evaporation temperatures was investigated. Cooling was successfully generated in the established micro absorption heat pump by: 8.

Development of an absorption heat pump water heater using an aqueous ternary hydroxide working fluid Keith E. Herold and Reinhard Radermacher Department of Mechanical Engineering, University of Maryland, College Park, MDUSA Lawrence Howe and Donald C.

Erickson Energy Concepts Co., Ridgeley Ave, Annapolis, MDUSA Received 15 January ; revised 21 May A novel absorption cycle, with a significantly higher temperature lift Cited by: Performance data have been obtained on a small glass absorption heat pump operating on the following three systems: (i) water-lithium chloride, (ii) water-calcium chloride, and (iii) a water-( by weight) mixture of lithium chloride and calcium chloride.

Salt solutions with concentrations of approximately 42% by weight were by: 2. Both LiCl and LiBr solutions were considered for potential use in a solar-driven Open-Cycle Absorption Refrigeration (OCAR) system.

A vertical falling film absorber was proposed and built to evaluate the performance of LiCl and LiBr as an by: The limits for the model of the absorption heat pump cycles will be at the heat pumps input and output of low pressure steam, condensate from the flue gas cleaning and the district heating water respectively.

(See Appendix I, figure 26) An absorption heat pump is a complex machine containing several different components and. In this paper, a membrane heat pump is proposed and analyzed. Fundamentally, the proposed heat pump consists of an aqueous CaCl2 solution flow separated from a water flow by a vapor-permeable.

Aqueous solutions (water solutions) have long been used as sin-gle phase (liquid only) secondary working fluids for cooling in su-permarkets, for ice rinks, heat recovery systems, heat pumps and other applications.

However, aqueous solutions are increasingly used also for freezers in supermarkets and other applications in. The development of an absorption based miniature heat pump system is motivated by the need for removal of increasing rates of heat from high performance electronic chips such as microprocessors.

The experiments were carried out from January to June of and, the collector efficiency (ηc), the heat pump coefficient of performance (COP) and the system performance (COPS) were calculated.

There is also a heat exchanger to improve the efficiency of the system. How Absorption Chiller Works First of all a mixture, of around 50% lithium bromide and 40% water, is pumped from the absorber through the heat exchanger and then up into the generator.

The absorber is a major component of absorption cycle systems, and its performance directly impacts the overall size and energy supplies of these devices. Absorption cooling and heating cycles have different absorber design requirements: in absorption cooling systems, the absorber works close to ambient temperature, therefore, the mass transfer is the most important phenomenon in order to Cited by: Coupled heat and mass transfer in a cross-flow hollow fiber membrane absorption heat pump (HFMAHP).

Applied Thermal Engineering, DOI: /ermaleng Jun Lu, Meilin Wang, Yongcai Li, Lulu Yang. Numerical study on dehumidification performance of a cross-flow liquid desiccant air by: A model for calculating the heat capacity of complex aqueous solutions with an arbitrary number of solutes and at an arbitrary temperature was developed.

Parameters for 79 solutes were established based on a critical review of the literature for solutions of one solute in water, with about points included.

The average difference between the calculated and experimental heat capacity is Cited by: Performance of an absorption heat transformer using new working binary systems composed of {ionic liquid and water} Article (PDF Available) in Applied Thermal Engineering 94 November with.

Given that the system uses latent heat for heating, the pump power consumption is greatly decreased. In order to use the low-temperature ambient air in winter as a low-temperature heat source for a heat pump system, Liu et al.

studied the performance simulation of a single-stage ammonia absorption heat pump and analysed the e ects of occurrence Author: Shaowu Yin, Yongle Shi, Lige Tong, Li Wang, Yulong Ding. In order to use the low-temperature ambient air in winter as a low-temperature heat source for a heat pump system, Liu et al.

studied the performance simulation of a single-stage ammonia absorption heat pump and analysed the effects of occurrence, absorption, and rectification temperatures on the heating performance of the : Shaowu Yin, Yongle Shi, Lige Tong, Li Wang, Yulong Ding.

@article{osti_, title = {Computer simulation of absorption heat pump using aqueous lithium bromide and ternary nitrate mixtures}, author = {Ally, M.R.}, abstractNote = {A new aqueous ternary mixture consisting of 53 wt % LiNO/sub 3/, 28 wt % KNO/sub 3/, and 19 wt % NaNO/sub 3/is available for high-temperature heat pump applications.

aqueous salt. FIG. Molar extinctions of both NaCl - - and GuHCl - - are approxi-mately two orders of magnitude lower than those previously reported for aqueous NaCl Ref. 28, solid line, original values are reported for amplitude absorption, and they have been scaled by a factor of 2 here to obtain corre-sponding intensity absorption.

_____ is used as the liquid absorbent in ammonia absorption system because it has the ability absorb ammonia vapours in large quantities and at a rate equaling the rate that vapour forms in the evaporator.

Performance and Economic study of the combined Absorption/ Compression Heat Pump, Energy Convers. & Mmgt. Elsevier Science Ltd. Vol. 40, Economic Feasibility and Performance Study of Solar Powered Absorption Cycle Using Some Aqueous Salt Solutions, Journal of Solar Energy Engineering, Transactions of ASME.

There are two principles on which heat pump can be operated. Conventional heat pump has a compressor which further required high grade energy. But vapor absorption heat pump is an alternate of vapor compressor heat pump.

In the vapor absorption heat pump compressor is replaced by an absorber, a generator and a water pump. The vapor pressures of the aqueous desiccants lithium chloride, lithium bromide, calcium chloride, ethylene glycol, propylene glycol, and their mixtures were measured at their typical operating concentrations and at temperatures from K to K.

The experimental data were fitted to an Antoine type of equation, ln[P(kPa)] = A − B/[T(K) + C], where A, B, and C are constants and are Cited by: heat sources less than C, which was obtained by the waste heat or the solar thermal energy.

However, the diffusion of AHP system in the market is slight compared with the absorption heat pump system. To expand the marketability, the enhancement of the cooling performance, cost reduction and compact design are required. @article{osti_, title = {Modeling of a Membrane-Based Absorption Heat Pump}, author = {Woods, J and Pellegrino, J and Kozubal, E and Slayzak, S and Burch, J}, abstractNote = {In this paper, a membrane heat pump is proposed and analyzed.

Fundamentally, the proposed heat pump consists of an aqueous CaCl{sub 2} solution flow separated from a water flow by a vapor-permeable : Woods, J. Density and dynamic viscosity of four aqueous alkaline nitrate and nitrite solutions were measured experimentally. These considered solutions are used in developed absorption refrigeration cycles and heat pumps as binary working fluids (coolant/absorber).

Experimentations used a vibrating-tube densimeter and piston-style viscosimeter for density and viscosity, by: 5. Falling film liquid desiccant dehumidification technology is attracting more and more attention due to lower energy consumption, less pollution, and more flexible humidity control in recent years.

This paper conducts a comprehensive review on falling film liquid desiccant dehumidification systems. Firstly, the working principles and features of the liquid desiccant dehumidification are Cited by: 1. Abstract. In absorption and stripping processes mass transfer takes place between gas and liquid phases at each stage throughout a column.

In the absorption process the solute, or component to be absorbed (e.g., CO 2), is transferred from the gas phase to the liquid the stripping process, the opposite occurs, i.e., mass transfer occurs from the liquid to the gas phase.

In practice a typical COP for an absorption cycle in air conditioning would be aboutcompared to about for a vapour compression system.

It appears that absorption systems require about five times more energy than vapour compression, but of course, the energy for absorption is heat energy, not work (electrical) energy. Chapter 5 Absorption and Stripping Introduction In absorption (also called gas absorption, gas scrubbing, or gas washing), there is a transfer of one or more species from the gas phase to a liquid solvent.

The species transferred to the liquid phase are referred to as solutes or absorbate. Absorption involves no change in the. -a fasting study and a food intervention study. crossover design -usually used in a bioequivalence study, in which each subject receives the test drug product and the reference product on different time periods separated by a washout period.

Air-source systems are the most commonly installed heat pumps. They have two parts: an indoor unit (air handler) and an outdoor unit (heat pump). The heat pump system is to be direct-fired with natural gas and is to use absorption working fluids whose properties are known.

Target coefficients of performance (COPs) are at 47{degrees}F and at 17{degrees} in the heating mode, and at 95{degree}F in the cooling mode, including the effect of.

Emulsions are viscid, multiphase systems in which one or more liquids are dispersed throughout another immis-cible liquid in the form of small droplets. When oil is the dispersed phase and an aqueous solution is the continu-ous phase, the system is designated as an oil-in-water emulsion.

Conversely, when water or an aqueous solu. The noncondensable gases collect near the _____ of the purge chamber and are drawn off by the vacuum pump. bottom True or False: The vacuum pump, which is of the two-stage, oil sealed, rotary vane type is a high volume unit.

Why absorption chillers fail Lithium bromide-based absorption refrigeration is a viable system capable of providing large-tonnage central air conditioning. Water is flash boiled under vacuum at low temperatures. This boiling action cools evaporator or chilled water coils (Fig.

1). design and operate the system under optimum operating conditions to make the process more efficient and also economically viable. The objective of this work is to study the effect of operating conditions on pervaporation separation performance of aqueous salt solutions.

A synthesised hybrid PVA/MA/silica membrane was tested for. The most downloaded articles from International Journal of Refrigeration in the last 90 days.

as drop-in alternatives of Ra in a water-to-water heat pump. July Illustrating the relationship between the coefficient of performance and the coefficient of system performance by means of an R supermarket refrigeration system.Physicochemical and thermodynamic study on aqueous solutions of dicyanamide – based ionic liquids.

The Journal of Chemical Thermodynamics70, DOI: / Aynur Senol. Solvation-based vapour pressure model for (solvent+salt) systems in Cited by: