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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.

by Dilip Vinayak Paranjape

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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

  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.


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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 [email protected]{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. 3. 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.