Experimental assessment of an absorption heat transformer prototype at different temperature levels into generator and into evaporator operating with water/Carrol mixture

Ibarra-Bahena, Jonathan; Romero, R.J.; Cerezo, J.; Valdez-Morales, C.V.; Galindo-Luna, Yuridiana Rocio; Velazquez-Avelar, L.

doi:10.1016/j.expthermflusci.2014.09.013

Cited by 14 publications

(6 citation statements)

References 40 publications

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“…The shown non-linear data correlate the diminished COP as function of the condenser temperature, which is the lower temperature of the thermodynamic cycle. This is in agreement with several papers for AHT [25][26][27][28][29][30][31][32][33][34][35][36] with consistent typical decreasing shape. For the same data, shown in Figure 5, the flow ratio as a function of thermal efficiency is observed as an asymptotic tendency for a lower FR value while thermal efficiency increases.…”

Section: The Usefulness Of the Dimensionless Conceptsupporting

confidence: 94%

On the Dimensionless Absorption Heat Pump Widespread

Romero

Cerezo

Martínez

et al. 2021

J. Adv. Therm. Sci. Res.

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Climate change has a huge challenge to 2050. Some renewable energies can be installed to reduce CO2 production. Unfortunately, the photovoltaic systems, wind energy, and ocean energy devices do not have direct thermal applications. These systems are useful for people’s electricity consumption. Absorption heat pumps (AHP) are thermal devices for increasing the temperature level from an energy source at medium temperature level, such as plane solar collectors, to another energy sink. The main problem with design, power calculations and device construction is a lack of education about this technology, which is more complex than compression heat pumps but with 90 % less electric energy consumption that would be supplied by photovoltaic cells. This paper shows an approximation for future engineers designing several absorption heat pumps to avoid global warming beyond the Paris Agreement. Future engineers should be encouraged to analyze this technology with this first and basic approach.

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Section: The Usefulness Of the Dimensionless Conceptsupporting

confidence: 94%

On the Dimensionless Absorption Heat Pump Widespread

Romero

Cerezo

Martínez

et al. 2021

J. Adv. Therm. Sci. Res.

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“…Consequently, the operational conditions should be modified in a way to eliminate the crystallization which results in a reduction in the performance of the cycle . This problem can be resolved by adding inhibitors or boosting the solubility using ternary mixtures that would cause corrosivity and toxicity which could be a worse problem. For NH 3 /H 2 O, the evaporation enthalpy of NH 3 is less than that of H 2 O.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a single stage absorption heat transformer-based desalination system employing a new working pair of (EMIM) (DMP)/H₂O

2018

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Summary The objective of this work is to analyze the performance of a novel ionic liquid (IL), (EMIM) (DMP)/H2O (1‐ethyl‐3‐methylimidazolium dimethyl phosphate, and water) as the working fluid of a single stage absorption heat transformer (AHT) integrated into a desalination system. The first and second laws of thermodynamics are applied for the suggested IL and compared with the conventional type, LiBr/H2O, under various operational conditions. The whole system has been modeled through a code developed in Engineering Equation Solver, and the results show that, from the viewpoints of energy and exergy analysis, the LiBr/H2O based system has a superior performance and delivers 6% more pure water, while the IL‐based system inhibits crystallization problem within AHT. As the final point, the referenced solution can be employed as a suitable alternative instead of conventional working pairs.

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“…No mesmo contexto do tipo de solução, diferentes trabalhos na literatura vêm mostrando a importância de utilizar medidores de vazão (tipo coriolis, tubo capilar, ultrassônico, outros) como medida principal na análise do desempenho dos sistemas de refrigeração por absorção [15][16]. Esta importância de mesurar a vazão interna do refrigerante e/ou solução absorvente (LiBr/H 2 O), é necessária para o entendimento do processo de absorção e dessorção em ciclos de refrigeração por absorção, já que estes valores são necessários em validações de estudos numéricos e otimizações de componentes [17][18][19][20][21].…”

Section: Introductionunclassified

Flow Control for Absorption Chillers Using the Par H2O / LiBr Driven in Recirculation Pumps of Low Power

cezar

Macario

Santos

et al. 2016

IEEE Latin Am. Trans.

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This paper proposes an effective method of variation of speed in the recirculation pump and consequently ensure optimum range of flow for absorption chillers when it uses the pair LiBr/H 2 O. These systems operate at subatmospheric pressures, merely for this reason the use of non-invasive flow measurement methods. The need for low power recirculation systems in such devices makes it impossible to adopt three-phase loads on the driven of the pumps. These implications prevented the achievement of advances in these systems, limiting the success of important contributions in the literature. Due this, it was designed an experimental apparatus reproducing the flow conditions which are submitted to absorption chillers with LiBr and developed a device that could changing the low power load speeds. It was implemented in LabVIEW language, a PID controller action system, which allowed tested to the flow control, initially for water and then to the saline LiBr/H 2 O.

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Experimental assessment of an absorption heat transformer prototype at different temperature levels into generator and into evaporator operating with water/Carrol mixture

Cited by 14 publications

References 40 publications

On the Dimensionless Absorption Heat Pump Widespread

On the Dimensionless Absorption Heat Pump Widespread

Performance analysis of a single stage absorption heat transformer-based desalination system employing a new working pair of (EMIM) (DMP)/H₂O

Flow Control for Absorption Chillers Using the Par H2O / LiBr Driven in Recirculation Pumps of Low Power

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Experimental assessment of an absorption heat transformer prototype at different temperature levels into generator and into evaporator operating with water/Carrol mixture

Cited by 14 publications

References 40 publications

On the Dimensionless Absorption Heat Pump Widespread

On the Dimensionless Absorption Heat Pump Widespread

Performance analysis of a single stage absorption heat transformer-based desalination system employing a new working pair of (EMIM) (DMP)/H2O

Flow Control for Absorption Chillers Using the Par H2O / LiBr Driven in Recirculation Pumps of Low Power

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Performance analysis of a single stage absorption heat transformer-based desalination system employing a new working pair of (EMIM) (DMP)/H₂O