Survey and Assessment of Available Measurements on Thermodynamic Properties of the Mixture {Water+Ammonia}

Tillner‐Roth, Reiner; Friend, Daniel G.

doi:10.1063/1.556014

Cited by 62 publications

(37 citation statements)

References 14 publications

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“…for ammonia-water mixtures: N = 2, k 11 = k 22 = 0.0, k 12 = k 21 = −0.2589; critical parameters and acentric factors are given in the Table 1 The equation of state was tested for the ammonia-water mixture on the data reported in [21,22,23,24]. Vapour-liquid equilibrium was calculated Heat transfer coefficients of boiling pure ammonia are similar to that of the boiling pure water and are 10-20 times as high as those of the ordinary organic refrigerants.…”

Section: Thermodynamic Properties Of the Working Fluidsmentioning

confidence: 99%

Heat recovery from Diesel engines: A thermodynamic comparison between Kalina and ORC cycles

Bombarda¹,

Invernizzi²,

Pietra³

2010

Applied Thermal Engineering

320

116

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To cite this version:Paola Bombarda, Costante Invernizzi, Claudio Pietra. Heat recovery from Diesel engines: a thermodynamic comparison between Kalina and ORC cycles. Applied Thermal Engineering, Elsevier, 2009, 30 (2-3) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Although the obtained useful powers are actually equal in value, the Kalina cycle requires a very high maximum pressure in order to obtain high thermodynamic performances (in our case, 100 bar against about 10 bar for the ORC cycle). So, the adoption of Kalina cycle, at least for low power level and medium-high temperature thermal 2 ACCEPTED MANUSCRIPT sources, seems not to be justified because the gain in performance with respect to a properly optimized ORC is very small and must be obtained with a complicated plant scheme, large surface heat exchangers and particular high pressure resistant and no-corrosion materials. ACCEPTED MANUSCRIPT

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Section: Thermodynamic Properties Of the Working Fluidsmentioning

confidence: 99%

Heat recovery from Diesel engines: A thermodynamic comparison between Kalina and ORC cycles

Bombarda¹,

Invernizzi²,

Pietra³

2010

Applied Thermal Engineering

320

116

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“…PVTX measurements introduced by Munakata's group [12], which are now carried out in the authors' laboratory, are fitted to the present EOS, because the PVTX measurements, which are referred to in a review article by Tillner-Roth and Friend [16], were not available. Munakata's results, which were available for the present study, cover four mole-fractions (i.e., x = 0.8934, 0.8003, 0.6927, and 0.5001) in the temperature range from 310 to 400 K at pressures from bubble point pressure to 17 MPa.…”

Section: Pvtx Propertiesmentioning

confidence: 99%

“…In this paper, the authors report an equation of state for water + ammonia mixture with the principle of corresponding state and two-fluid model based on the experimental data measured in the laboratory accurately. As the review by Tillner-Roth and Friend [16] shows, there are insufficient amounts of experimental data on a variety of properties for water + ammonia mixture. The comparison with equations of state proposed by Peng and Robinson (PR-EOS), by Platzer and Maurer (PM-EOS), and by Tillner-Roth and Friend (TRF-EOS) is also reported.…”

Section: Introductionmentioning

confidence: 98%

Equation of state for fluid mixtures based on the principle of corresponding states with a two‐fluid model: Application to fluid mixtures of water + ammonia

Suzuki

Uematsu

2002

Heat Trans. Asian Res.

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We propose an equation of state for fluid mixtures of water + ammonia which is expressed in Helmholtz free energy as a function of temperature, molar volume, and mole fraction. IAPWS Formulation 1995 for water and the equation of state by Tillner-Roth and colleagues for ammonia should be used for each pure component with the present equation. We applied the principle of corresponding states with a two-fluid model to the present equation for fluid mixtures. On comparison with experimental data, the uncertainty in property calculations by the present equation was evaluated: within ±0.03 ⋅ x for bubble point curve, within ±0.04 ⋅ x for dew point curve, within ±0.02 ⋅ ρ L for saturated liquid density, and within ±0.02 ⋅ ρ for PVTX properties.

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“…Este último trabajo amplió la experimentación de 2.068 MPa a 3.45 MPa en todo el intervalo de concentración. Lo cual representó, hasta entonces y durante algún tiempo después, la base de consulta para la mayoría de ingenieros e investigadores [5,9] como base de cálculos para el diseño y evaluación de SRA, debido a que cubría todo el intervalo de concentración a presiones y temperaturas adecuadas para estos sistemas.…”

Section: Introductionunclassified

Desarrollo de una aplicación para el cálculo de las propiedades de la mezcla amoniaco-agua

Vera-Romero

Heard

2017

I2+D

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ResumenEl diseño y la optimización de sistemas energéticos en la actualidad son de gran importancia. Algunos de estos sistemas emplean la mezcla amoniaco-agua como fluido de trabajo, por lo tanto, el cálculo de las propiedades termodinámicas se vuelve indispensable para su evaluación, diseño y optimización. En el presente trabajo se ha desarrollado una aplicación en Excel TM empleando Visual Basic (VBA) a partir de una formulación basada en la energía de Gibbs de exceso, con la finalidad de simular diversos sistemas, como pueden ser de refrigeración, aire acondicionado, bombas de calor, cogeneración y ciclos de potencia, sin la necesidad de adquirir simuladores comerciales para tal propósito. Para validar dicho programa se han comparado los resultados con los datos arrojados por el software desarrollado por el National Institute of Standars and Technology (NIST) y datos experimentales reportados en literatura.Palabras clave: mezcla amoniaco-agua; propiedades termodinámicas; energía libre de Gibbs de exceso; entalpía; entropía. AbstractThe design and optimization of energy systems are very important today. Some of these systems use the ammonia-water mixture as working fluid, therefore, calculation of the thermodynamic properties becomes indispensable for its evaluation, design and optimization. In the present work an application has been developed in Excel TM using Visual Basic (VBA) from a formulation based on free Gibbs Energy of Excess, in order to simulate different systems such as cooling, air conditioning, heat pumps, cogeneration and power cycles, without to acquire commercial simulators for this purpose. To validate this program, the results were compared with data obtained by the National Institute of Standards and Technology (NIST) software and experimental data reported in the literature.

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Survey and Assessment of Available Measurements on Thermodynamic Properties of the Mixture {Water+Ammonia}

Cited by 62 publications

References 14 publications

Heat recovery from Diesel engines: A thermodynamic comparison between Kalina and ORC cycles

Heat recovery from Diesel engines: A thermodynamic comparison between Kalina and ORC cycles

Equation of state for fluid mixtures based on the principle of corresponding states with a two‐fluid model: Application to fluid mixtures of water + ammonia

Desarrollo de una aplicación para el cálculo de las propiedades de la mezcla amoniaco-agua

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