Numerical analysis of flow patterns maps in horizontal pipes with variation of inclination angles in a collector/evaporator of a DX-SAHP

Quitiaquez, William; Herrera, Alex F.; Isaza-Roldán, C.A.; Mena, Michael; Nieto-Londoño, César; Toapanta-Ramos, Fernando

doi:10.1016/j.matpr.2021.08.015

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…TRNSYS [52] The flow pattern charts of R600a are illustrated in a collector/evaporator of a DX-SAHP, which were generated in a horizontal pipe with varying inclination angles.…”

Section: Trnsys 18 Matlab and Genopt [46]mentioning

confidence: 99%

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Application of Photovoltaic and Solar Thermal Technologies in Buildings: A Mini-Review

Xiao,

Lai,

Chen

et al. 2024

Coatings

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Buildings account for a significant proportion of total energy consumption. The integration of renewable energy sources is essential to reducing energy demand and achieve sustainable building design. The use of solar energy has great potential for promoting energy efficiency and reducing the environmental impact of energy consumption in buildings. This study examines the applications of photovoltaic and solar thermal technologies in the field of architecture, demonstrating the huge potential of solar energy in building applications. To ensure a fresh and thorough review, we examine literature that encompasses the advancements made in the utilization of solar energy in buildings over the past decade. The key factors to consider in this study are reliability, performance, cost and aesthetics in real applications of photovoltaic and solar thermal technologies in the field of architecture, which have a significant impact on people’s acceptance of solar energy technology. Recent developments in feasible and effective optimization solutions for solar energy technologies are summarized. Accurate and convenient simulation techniques are also summarized for reference. The results show that the rapid progress of BIPV systems is fueled by advancements in three crucial areas: enhancing solar cell and module efficiency, reducing manufacturing costs and achieving a competitive levelized cost of electricity. The results can provide researchers with a reference for understanding recent technological developments in the integration of solar energy into buildings.

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“…TRNSYS [52] The flow pattern charts of R600a are illustrated in a collector/evaporator of a DX-SAHP, which were generated in a horizontal pipe with varying inclination angles.…”

Section: Trnsys 18 Matlab and Genopt [46]mentioning

confidence: 99%

“…Additionally, flow pattern maps for horizontally aligned pipes for a direct expansion solar-assisted heat pump system (DX-SAHP) were presented based on another mathematical model [52]. Researchers have also developed a thermal simulation model that accounted for the hysteresis effect of phase change materials.…”

Section: Inhouse Codementioning

confidence: 99%

Application of Photovoltaic and Solar Thermal Technologies in Buildings: A Mini-Review

Xiao,

Lai,

Chen

et al. 2024

Coatings

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show abstract

“…Different flow regimes can be observed across different flow channel shapes, orientations, and operating conditions, with different flow regimes also arising because of properties of the flow itself, including phase velocity and vapor quality [2]. Much of the literature aims to relate flow regime classes to the measured physical characteristics of the flow and to define the regimes and their transitions in terms of these physical characteristics, for a given set of experimental conditions [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Computer Vision-Based Classification of Flow Regime and Vapor Quality in Vertical Two-Phase Flow

Kadish

Schmid

Son

et al. 2022

Sensors

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This paper presents a method to classify flow regime and vapor quality in vertical two-phase (vapor-liquid) flow, using a video of the flow as the input; this represents the first high-performing and entirely camera image-based method for the classification of a vertical flow regime (which is effective across a wide range of regimes) and the first image-based tool for estimating vapor quality. The approach makes use of computer vision techniques and deep learning to train a convolutional neural network (CNN), which is used for individual frame classification and image feature extraction, and a deep long short-term memory (LSTM) network, used to capture temporal information present in a sequence of image feature sets and to make a final vapor quality or flow regime classification. This novel architecture for two-phase flow studies achieves accurate flow regime and vapor quality classifications in a practical application to two-phase CO2 flow in vertical tubes, based on offline data and an online prototype implementation, developed as a proof of concept for the use of these models within a feedback control loop. The use of automatically selected image features, produced by a CNN architecture in three distinct tasks comprising flow-image classification, flow-regime classification, and vapor quality prediction, confirms that these features are robust and useful, and offer a viable alternative to manually extracting image features for image-based flow studies. The successful application of the LSTM network reveals the significance of temporal information for image-based studies of two-phase flow.

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Identification and maximum impact force modeling investigation for critical slugging in underwater compressed gas energy storage systems

Liang¹,

Xiong²,

Wang³

et al. 2023

Journal of Energy Storage

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Numerical analysis of flow patterns maps in horizontal pipes with variation of inclination angles in a collector/evaporator of a DX-SAHP

Cited by 3 publications

References 28 publications

Application of Photovoltaic and Solar Thermal Technologies in Buildings: A Mini-Review

Application of Photovoltaic and Solar Thermal Technologies in Buildings: A Mini-Review

Computer Vision-Based Classification of Flow Regime and Vapor Quality in Vertical Two-Phase Flow

Identification and maximum impact force modeling investigation for critical slugging in underwater compressed gas energy storage systems

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