Analysis of a new cross flow heat exchanger flow arrangement – Extension to several rows

Cabezas‐Gómez, Luben; Navarro, Hélio Aparecido; Saíz-Jabardo, José Maria; Hanriot, Sérgio de Morais; Maia, Cristiana Brasil

doi:10.1016/j.ijthermalsci.2012.01.001

Cited by 15 publications

(6 citation statements)

References 20 publications

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“…Guo et al [18] successfully conducted theoretical analysis and experimental confirmation of the uniformity principle with thirteen types of heat exchangers. Cabezas-Gomez et al [19,20] addressed same confirmations theoretically and numerically with new flow arrangements as well. Moreover, the circuitry adjustment method is extended to other applications.…”

Section: Introductionmentioning

confidence: 59%

Performance comparison of heat exchangers with different circuitry arrangements for active chilled beam applications

Chen

Cai

Wang

et al. 2014

Energy and Buildings

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Section: Introductionmentioning

confidence: 59%

Performance comparison of heat exchangers with different circuitry arrangements for active chilled beam applications

Chen

Cai

Wang

et al. 2014

Energy and Buildings

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“…Substituting ( 1) and ( 7) into (8) we can find:   (8) Another concept that is introduced in the evaluation and that has certain practical value, despite being little used, is that of the efficiency of an exchanger. (9) This parameter represents the extent to which this heat transfer is carried out at the maximum temperature, so it can lead us directly to evaluate the performance of a unit as a function of the temperature of the fluids present in the heat exchanger.…”

Section:  mentioning

confidence: 99%

“…From a set of comparative readings of operating parameters of the industrial refrigeration installation and applying the method of evaluating the number of thermal units transferred per unit area as a function of effectiveness (NTU-effectiveness) [8] , the necessary elements for the development of this research are obtained.…”

Section: Introductionmentioning

confidence: 99%

Comments on a Heat Recovery Unit in Refrigeration Industry

Imbert-González

Guillen-Gordín

2020

TSE

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Heat recovery is one of the measures proposed for the appropriate use of ammonia in tropical countries. This article analyzes a heat recovery system installed in an industrial refrigeration plant. Based on comparative readings of operating parameters of the installation, determined the effectiveness of the heat exchange, the increase in the efficiency of the refrigeration system, as well as the fuel saved by heating water in the industry. The results obtained reported that the thermal design based on heat exchange in annular spaces allows a significant saving of resources and a high rate of thermal utilization.

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“…the heat exchanger efficiency defined as the ratio of the actual to the optimum rate of heat transfer [10][11][12]. To determine the performance of heat exchangers, the required, or obtained, heat transfer units [13] were also proposed.…”

Section: Introductionmentioning

confidence: 99%

The black box model of a double-tube counter-flow heat exchanger

Laskowski

2014

Heat Mass Transfer

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the heat capacity rates of both fluids, and NTU, with no constant coefficients. The proposed relations were verified against the data produced by a simulator of a double-tube counter-flow heat exchanger. The difference between the hot fluid outlet temperature and the cold fluid inlet temperature List of symbolsThe difference between the hot fluid inlet temperature and the cold fluid outlet temperatureAbstract Variable working conditions of a double-tube counter-flow heat exchanger were analysed. During operation of the heat exchanger, the parameters (temperatures and mass flow rates) of both fluids at its inlet change, which leads to a change in its performance. Heat transfer effectiveness is commonly used to assess the heat exchanger performance, defined as the ratio of the actual to the maximum heat flow rate. In the present paper, the heat exchanger was considered to be a 'black box', and the aim was to investigate how the inlet parameters (temperatures and mass flow rates of both fluids) affect the outlet ones (temperatures of both fluids), and thus to attempt to introduce a new relation for the heat transfer effectiveness of a counter-flow heat exchanger as a function of only inlet parameters. Following the analysis, a relation for the heat transfer effectiveness as a function of inlet parameters with five constant coefficients was obtained. These coefficients depend on the heat exchanger geometry and on the properties of the heat transfer fluids; they are not general-purpose, but specific to a counter-flow heat exchanger. The form of the proposed relation for the heat transfer effectiveness of a counter-flow heat exchanger is not satisfactory as it involves five constant coefficients; therefore, a new approach was chosen, consisting in analysing a parameter defined as the ratio of the minimum to the actual arithmetic mean temperature difference. Using the parameter defined in this way, the relation for the heat transfer effectiveness of a counter-flow heat exchanger was obtained as a function of two parameters: the ratio of R. Laskowski (*)

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Analysis of a new cross flow heat exchanger flow arrangement – Extension to several rows

Cited by 15 publications

References 20 publications

Performance comparison of heat exchangers with different circuitry arrangements for active chilled beam applications

Performance comparison of heat exchangers with different circuitry arrangements for active chilled beam applications

Comments on a Heat Recovery Unit in Refrigeration Industry

The black box model of a double-tube counter-flow heat exchanger

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