Dynamic simulation of an absorption heat pump for recovering low grade waste heat

Jeong, So Won; Kang, B.H.; Karng, Sarng Woo

doi:10.1016/s1359-4311(97)00040-9

Cited by 68 publications

(28 citation statements)

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“…However, while absorption cycle heat pumps have received some attention in terms of modeling for the purpose of design and operation under steady state conditions, the literature is quite limited when it comes to modeling for control purposes. [8] and [9] provides an overview of the technology, but does not consider dynamic operation; [10], [11], and [12] all provide steady-state models of absorption cycle heat pumps of varying degree of detail, but also do not consider dynamics. [13] and [14] both present models that include dynamics (mass storage and thermal inertia), but the main focus remains on steady-state operation.…”

Section: Introductionmentioning

confidence: 99%

Absorption cycle heat pump model for control design

Vinther

Nielsen²,

Nielsen

et al. 2015

2015 European Control Conference (ECC)

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Abstract-Heat pumps have recently received increasing interest due to green energy initiatives and increasing energy prices. In this paper, a nonlinear dynamic model of a singleeffect LiBr-water absorption cycle heat pump is derived for simulation and control design purposes. The model is based on an actual heat pump located at a larger district heating plant. The model is implemented in Modelica and is based on energy and mass balances, together with thermodynamic property functions for LiBr and water and staggered grid representations for heat exchangers. Model parameters have been fitted to operational data and different scenarios are simulated to investigate the operational stability of the heat pump. Finally, this paper provides suggestions and examples of derivation of lower order linear models for control design.

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Section: Introductionmentioning

confidence: 99%

Absorption cycle heat pump model for control design

Vinther

Nielsen²,

Nielsen

et al. 2015

2015 European Control Conference (ECC)

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“…lumped and distributed parameter models, and pointed out that most of the works were based on lumped parameter models with two exceptions (Butz and Stephan, [42]; Sano et al, [43]). Some other works not mentioned in Zhuo [37] included modeling of a periodically operating ammonia-water heat pump by Jeong, [44], a solar ammonia-water absorption cooling system with refrigerant storage by Kaushik et al, [45] and more recent works on hot water-driven LiBr-water absorption heat pump and chillers by Jeong et al, [46]; Bina et al, [47]; Kohlenbach and Ziegler, [48]; Fu et al, [49]. Distributed parameter model such as Butz and Stephan [50] required excessive computing time for the time scale to be simulated in the present study.…”

Section: Evaluation Of Solar Absorption Cooling Systemsmentioning

confidence: 99%

State of the Art of Solar Absorption Cooling Technologies

Ameer¹

2017

IJRASET

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“…However, chiller systems will typically operate under dynamic conditions, due to (for example) on/off or modulating behaviour, start up and shut down or other temporal fluctuations in operating conditions, as discussed by Jeong et al [12] and Fujii et al [7]. Dynamic models [12 16], whilst intrinsically more complex, are therefore a more appropriate means to assess the performance of absorption chillers within a trigeneration system reliant on transient heat input such as that supplied by solar energy and subject to a fluctuating load.…”

Section: $ and ! ' !( ) ( *mentioning

confidence: 99%

The development and calibration of a generic dynamic absorption chiller model

Borg

Kelly

2012

Energy and Buildings

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This version is available at https://strathprints.strath.ac.uk/42941/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Simon Paul Borg i , Nicolas James Kelly Energy Systems Research Unit Department of Mechanical and Aerospace Engineering University of Strathclyde, Glasgow, UKAlthough absorption cooling has been available for many years, the technology has typically been viewed as a poorly performing alternative to vapour compression refrigeration. Rising energy prices and the requirement to improve energy efficiency is however driving renewed interest in the technology, particularly within the context of combined cooling, heat and power systems (CCHP) for buildings. In order to understand the performance of absorption cooling, numerous models are available in the literature. However, the complexities involved in the thermodynamics of absorption chillers have so far restricted researchers to creating steady state or dynamic models reliant on data measurements of the internal chiller state, which require difficult to obtain, intrusive measurements.The pragmatic, yet fully dynamic model described in this paper is designed to be easily calibrated using data obtained from the measurements of inflows and outflows to a chiller, without resorting to intrusive measurements. The model comprises a series of linked control volumes featuring both performance maps and lumped mass volumes, which reflect the underlying physical structure of the device. The model was developed for the ESP r building simulation tool. This paper describes the modelling approach, theory and limitations, along with its calibration and the application of the model to a specific example.The increased use of air conditioning in buildings, including dwellings over the last 30 years has contributed to a significant increase in electrical energy consumption [1], particularly in southern European countries [2]. The conditioning systems installed are typically packaged, spli...

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Dynamic simulation of an absorption heat pump for recovering low grade waste heat

Cited by 68 publications

References 1 publication

Absorption cycle heat pump model for control design

Absorption cycle heat pump model for control design

State of the Art of Solar Absorption Cooling Technologies

The development and calibration of a generic dynamic absorption chiller model

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