Energy efficient heat pipe heat exchanger for waste heat recovery in buildings

Burlacu, Andrei; Sosoi, Gavril; Vizitiu, Robert Ștefan; Bărbuţă, Marinela; Lăzărescu, Constantin Doru; Ciocan, Vasilică; Șerbănoiu, Adrian Alexandru

doi:10.1016/j.promfg.2018.03.103

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…Based on the experimental results, the heat pipe was able to recover the heat radiation and natural convection (about 4 kW). Burlacu et al 16 analyzed the CFD of a well-designed heat pipe exchanger used in a building. This research focused on the development of heat pipes for use in the preheating section in the air-conditioning system's outlet.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, different experiments have been carried out to use PHP in industries. [13][14][15][16][17][18][19][20][21][22][23][24] The innovation of the current paper is the design of a laboratory system through creating similar boundary conditions in a natural gas compressor station. In the natural gas transmission industry, the natural gas temperature is reduced by the use of ACHE; therefore, in this study, for the first time, similar conditions were established in the laboratory system, and laboratory testing was conducted at different velocities of inlet fluid, cooling fan system, and tubes.…”

Section: Introductionmentioning

confidence: 99%

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Investigating different types of fluids in pulsating heat pipes for improving heat transfer in an air-cooled heat exchanger

Alizadeh

Movahedi

Mirzahosseini

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Air-cooled heat exchangers are utilized in various industries to cool process fluids. To have a better heat transfer, fins are used in the structure of exchangers. In this study, a set of experiments were performed to investigate the improvement in the amount of heat transfer in an air-cooled heat exchanger. For this purpose, a real case study was conducted on air-coolers in a natural gas compressor station; afterward, the finned tubes were replaced by pulsating heat pipes (PHPs), and a different type of fluid was applied to the pulsating heat pipes. The laboratory system was set up to measure the overall heat transfer coefficient under two conditions involving either finned tubes or a PHP with R134, R22, and filled acetone fluids. Finally, the results were verified by the theory method. The results showed that all the three fluid agents (R134, R22, and Acetone) with natural convection of 9.94 m/s, an inlet fluid velocity of 5.54 m/s, and an average feed velocity were able to enhance the heat transfer coefficient by 10, 13, and 11%, respectively. In addition, compared with finned tubes, R134, R22, and Acetone improved the natural convection heat transfer coefficient by 22.2, 18.6, and 21.7%, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating different types of fluids in pulsating heat pipes for improving heat transfer in an air-cooled heat exchanger

Alizadeh

Movahedi

Mirzahosseini

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…The CFD tools are useful for industrial purposes or factory applications. However, heat transfer modelling can be extended for waste heat recovery in buildings [18], Earth to Air heat exchangers [19], regenerative mini channel heat exchangers [20], or oscillatory flow exchangers [21]. The computational time increases with the number of mesh elements (so the improvement of the accuracy).…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of Heat Exchangers with a Valid CFD Simulation

Sass¹,

Kummer

Ulbert

et al. 2021

Period. Polytech. Chem. Eng.

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Energy efficiency, safety and stable operation of units are the most crucial aspects in every industrial process. In this study, Computational Fluid Dynamics (CFD) simulations were used to study heat transfer in a laboratory-sized tubular heat exchanger. A partly 2D axisymmetric and mainly 3D model of the heat exchanger was created and validated with several simulation in different operating points of heating capacity and volume flow. The results of the simulations were compared to experimental data to validate the model. The inlet and outlet temperatures were measured with Pt100 temperature probes, and the surface temperatures were measured with an infrared camera. The heat transfer coefficient was determined based on the surface measurements The validated model was applied for the investigation of performance losses of heat exchanger due to fouling caused by particle deposits along the tube which caused reduced heat transfer surface or performance and a failure of heating wire which caused reduced heating performance, hence altered heat and flow characteristics through the equipment. The results provide useful information not only in the design processes but the operational lifetime as well.

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“…Heat pipe applications in buildings also include the possibility to integrate them in glazed facades to take advantage of the solar radiation [25] to recover the waste heat [26].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Novel Heat Pipe Radiant Floor Heating System with Integrated Phase Change Materials

Brănoaea

Burlacu

Ciocan

et al. 2020

The 14th International Conference on Interdisciplinarity in Engineering—INTER-Eng 2020

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The subject of buildings energy efficiency has gained increased interest in modern society. Recently, researchers aiming to reduce the energy demand of buildings have studied the implementation of phase change materials (PCMs) in various building elements. At the same time, researchers studied the implementation of unconventional technologies such as heat pipes (HP) in the buildings’ heating system. This paper combines both of these technologies in order to take advantage of the thermal storage properties of PCMs and overcome their reduced conductivity with heat pipes. Through computational fluid dynamics (CFD) simulations, this paper studies and highlights that with the implementation of a PCM, a reduction of the daily energy demand is achieved through the increase in the discharge phase time.

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Energy efficient heat pipe heat exchanger for waste heat recovery in buildings

Cited by 28 publications

References 10 publications

Investigating different types of fluids in pulsating heat pipes for improving heat transfer in an air-cooled heat exchanger

Investigating different types of fluids in pulsating heat pipes for improving heat transfer in an air-cooled heat exchanger

Failure Analysis of Heat Exchangers with a Valid CFD Simulation

Numerical Investigation of a Novel Heat Pipe Radiant Floor Heating System with Integrated Phase Change Materials

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