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Relevant bibliographies by topics / HTF TUBE WITH FINS

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Academic literature on the topic 'HTF TUBE WITH FINS'

Author: Grafiati

Published: 11 September 2023

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Journal articles on the topic "HTF TUBE WITH FINS"

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Senthil, Ramalingam, Aditya Patel, Rohan Rao, and Sahil Ganeriwal. "Melting Behavior of Phase Change Material in a Solar Vertical Thermal Energy Storage with Variable Length Fins added on the Heat Transfer Tube Surfaces." International Journal of Renewable Energy Development 9, no. 3 (2020): 361–67. http://dx.doi.org/10.14710/ijred.2020.29879.

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This paper investigates the melting behaviour of phase change material (PCM) in a vertical thermal energy storage system with provision of thin rectangular fins of uniform and variable lengths on the heat transfer tube surfaces. The selected PCM and heat transfer fluid (HTF) are paraffin wax and water, respectively. The HTF is passed through the helically coiled copper tube of 10 mm diameter to melt the PCM. The time required to complete the melting of PCM in the system with fins is found to be five hours, whereas for the system without fins it is five hours and forty minutes, for the same con

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Senthil, Ramalingam. "Effect of uniform and variable fin height on charging and discharging of phase change material in a horizontal cylindrical thermal storage." Thermal Science 23, no. 3 Part B (2019): 1981–88. http://dx.doi.org/10.2298/tsci170709239s.

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The effect of fin profile on melting of phase change material (PCM) is presented. The test section contains an acrylic tube of 50 mm outer diameter and a copper tube of 16 mm outer diameter and a length of 1000 mm each. Both tubes are kept coaxially. The heat transfer fluid (HTF) flows through the copper tube. The PCM is paraffin wax and filled in the annular region. The considered fin profiles are the uniform and variable fin heights of circular, triangular and elliptical profiles. Fins are fixed on the HTF tube and protruded into the PCM. The total fin surface area is maintained same among t

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Torbarina, Fran, Kristian Lenic, and Anica Trp. "Computational Model of Shell and Finned Tube Latent Thermal Energy Storage Developed as a New TRNSYS Type." Energies 15, no. 7 (2022): 2434. http://dx.doi.org/10.3390/en15072434.

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This paper presents the development of a computational model of latent thermal energy storage (LTES) in a shell and tube configuration with longitudinal fins. The model describes the physical process of transient heat transfer between the heat transfer fluid (HTF) and the phase change material (PCM) in LTES. For modeling the phase change of the PCM, the enthalpy formulation was used. Based on a one-dimensional computational model, a new Trnsys type was developed and written in Fortran. Validation of the LTES model was performed by comparing numerically and experimentally obtained data for the

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Akarsh, A., and Sumer Dirbude. "Effect of HTF flow direction, mass flow rate and fins on melting and solidification in a latent-heat-based thermal energy storage device." Journal of Physics: Conference Series 2054, no. 1 (2021): 012049. http://dx.doi.org/10.1088/1742-6596/2054/1/012049.

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Abstract Latent-heat-based thermal energy systems (LHTES) have commonly been used as a potential energy storage mode over any other mode of thermal energy storage. Many heat transfer enhancement techniques have been proposed over the past years. These techniques reduce the melting and solidification times. Most of these techniques focus on the phase change material (PCM). However, the flow direction of the heat transfer fluid (HTF) can affect the heat transfer performance and pumping power requirement of the system. In this paper, the effect of HTF-flow direction, HTF mass flow rate and additi

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Yu, Meng, Xiaowei Sun, Wenjuan Su, et al. "Investigation on the Melting Performance of a Phase Change Material Based on a Shell-and-Tube Thermal Energy Storage Unit with a Rectangular Fin Configuration." Energies 15, no. 21 (2022): 8200. http://dx.doi.org/10.3390/en15218200.

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A case study on the melting performance of a shell-and-tube phase change material (PCM) thermal energy storage unit with a novel rectangular fin configuration is conducted in this paper. Paraffin wax and circulated water are employed as the PCM and heat transfer fluid (HTF), respectively. It can be observed that the melting performance could be significantly improved by using rectangular fins. Melting photographs demonstrate that the melting of the PCM is firstly dominated by heat conduction; then, the melting rate is improved further due to natural convection. Moreover, the results illustrate

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Sun, Xinguo, Hayder I. Mohammed, Mohammadreza Ebrahimnataj Tiji, et al. "Investigation of Heat Transfer Enhancement in a Triple Tube Latent Heat Storage System Using Circular Fins with Inline and Staggered Arrangements." Nanomaterials 11, no. 10 (2021): 2647. http://dx.doi.org/10.3390/nano11102647.

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Inherent fluctuations in the availability of energy from renewables, particularly solar, remain a substantial impediment to their widespread deployment worldwide. Employing phase-change materials (PCMs) as media, saving energy for later consumption, offers a promising solution for overcoming the problem. However, the heat conductivities of most PCMs are limited, which severely limits the energy storage potential of these materials. This study suggests employing circular fins with staggered distribution to achieve improved thermal response rates of PCM in a vertical triple-tube heat exchanger i

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Cieśliński, Janusz T., and Maciej Fabrykiewicz. "Thermal Energy Storage with PCMs in Shell-and-Tube Units: A Review." Energies 16, no. 2 (2023): 936. http://dx.doi.org/10.3390/en16020936.

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The paper presents a survey of the experimental and numerical studies of shell-and-tube systems in which phase change material (PCM) is used. Due to the multitude of design solutions for shell-and-tube systems, the emphasis is placed on double-tube (DT), triplex-tube (TT), and multi-tube (MT) units. Additionally, only single-pass systems are considered. Particular attention is paid to the method of heat transfer intensification. The analysis of the research results begins with the classification of each of the three mentioned systems. The systems are divided according to the angle of inclinati

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Pagkalos, Christos, Michalis Gr Vrachopoulos, John Konstantaras, and Kostas Lymperis. "Comparing water and paraffin PCM as storage mediums for thermal energy storage applications." E3S Web of Conferences 116 (2019): 00057. http://dx.doi.org/10.1051/e3sconf/201911600057.

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A CFD analysis is performed in two different heat storage mediums, water and paraffin phase change material (PCM), in order to evaluate and compare the two mediums for use in heating thermal energy storage (HTES) applications. The two mediums use different heat storing mechanisms, namely water uses Sensible Heat Storage, and the PCM Latent heat storage. The applied computational domain represents a single tube of a heat exchanger (HE), and so it comprises of a copper tube with aluminium fins. The geometric characteristics of the domain are taken in accordance with commercially used HE’s for HT

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Sunden, Bengt Ake, Zan Wu, and Dan Huang. "Comparison of heat transfer characteristics of aviation kerosene flowing in smooth and enhanced mini tubes at supercritical pressures." International Journal of Numerical Methods for Heat & Fluid Flow 26, no. 3/4 (2016): 1289–308. http://dx.doi.org/10.1108/hff-12-2015-0538.

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Purpose – The purpose of this paper is to numerically investigate the heat transfer performance of aviation kerosene flowing in smooth and enhanced tubes with asymmetric fins at supercritical pressures and to reveal the effects of several key parameters, such as mass flow rate, heat flux, pressure and inlet temperature on the heat transfer. Design/methodology/approach – A CFD approach is taken and the strong variations of the thermo-physical properties as the critical point is passed are taken into account. The RNG k-ε model is applied for simulating turbulent flow conditions. Findings – The n

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Dhaou, Mohamed Houcine, Sofiene Mellouli, Faisal Alresheedi, and Yassine El-Ghoul. "Numerical Assessment of an Innovative Design of an Evacuated Tube Solar Collector Incorporated with PCM Embedded Metal Foam/Plate Fins." Sustainability 13, no. 19 (2021): 10632. http://dx.doi.org/10.3390/su131910632.

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The objective of this manuscript is to study the possibility of improving the thermal performance of an Evacuated Tube Solar Collector (ETSC) with the integration of a Phase Change Material (PCM) incorporated into metallic foam and fitted with plate fins. A 2D mathematical model has been proposed. Two types of metal foams (copper and nickel) were inserted. In addition, the effect of metal foam pore size of on heat transfer was studied. The results were acquired through numerical simulations of four different cases; namely, Case 1: pure PCM, Case 2: with metal foam, Case 3: with fins and Case 4

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Dissertations / Theses on the topic "HTF TUBE WITH FINS"

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Ebeling, Christopher P. "Measurements and Predictions of the Heat Transfer at the Tube-Fin Junction for Louvered Fin Heat Exchangers." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/10140.

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Compact heat exchangers are usually characterized by a large heat transfer surface per unit of volume. These characteristics are useful when thermal energy between two or more fluids must be exchanged without mixing. Most compact heat exchangers are liquid-to-air heat exchangers, with approximately 85% of the total thermal resistance occurring on the air side of the heat exchanger. To reduce the space and weight of a compact heat exchanger, augmentation strategies must be proposed to reduce the air side resistance. However, before any strategies to augment the air side heat transfer can be pro

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Lawson, Michael James. "Practical Applications of Delta Winglets in Compact Heat Exchangers with Louvered Fins." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34141.

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<p>Compact heat exchangers are widely used by the automotive industry in systems that cool engine components. Louvered fin heat exchangers are used over their continuous fin counterparts because of the significant advantages they provide in heat transfer efficiency, while only causing small increases in overall pressure losses. With the recent emphasis that has been placed on reducing fuel consumption, decreasing the size of the compact heat exchanger has become an important concern. With reduction in size comes not only weight savings, but also a decrease in frontal area in a vehicle that

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Silva, Bruno José Gonçalves da. "Avaliação técnica SPME/LC na análise de antidepressivos em amostra de plasma para fins de monitorização terapêutica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-17082007-114009/.

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As recentes técnicas miniaturizadas de preparo de amostra, microextração em fase sólida (SPME) e in tube SPME, apresentam uma série de vantagens em relação aos métodos clássicos de extração (extração líquido-líquido e extração em fase sólida), tais como: não requer instrumentação analítica sofisticada, utilização de pequenas quantidades de solventes orgânicos, rápido processo operacional, permite automação das análises, a reutilização das fases extratoras, e integra em um único sistema a extração, concentração e introdução da amostra no cromatográfico. Esta dissertação tem como objetivo a padr

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Mahdi, Jasim M. "ENHANCEMENT OF PHASE CHANGE MATERIAL (PCM) THERMAL ENERGY STORAGE IN TRIPLEX-TUBE SYSTEMS." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1533.

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The major challenge associated with renewable-energy systems especially solar, is the supply intermittency. One effective solution is to incorporate thermal energy storage components utilizing phase change materials (PCMs). These materials have the potential to store large amounts of energy in relatively small volumes and within nearly an isothermal storage process. The primary drawback of today’s PCMs is that their low thermal conductivity values critically limit their energy storage applications. Also, this grossly reduces the melting/ solidification rates, thus making the system response ti

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KUMAR, NITIN. "PERFORMANCE ANALYSIS OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEM USING FINS." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19964.

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The Purpose of the current work is to examine the performance of a PCM i.e. phase change material within a Trapezoidal shape unit to store heat energy. The Numerical simulation is done using ANSYS 22 software to simulate and analyze the results, focusing on temperature and time contours throughout melting part and solidification part of PCM. Storage unit features a square shape tube in which fins are attached to the tube to study the HTR. One main challenge encountered in PCM melting is the collection of solid material at the lowermost in a process of charging and LF rests at the

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Che, Lin Chin, and 林志澤. "Heat Transfer of Reciprocating Curved Tube Fitted With Longitudinal Fins." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59490803320664879363.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>94<br>This experimental study examines the heat transfer of the reciprocating curved tube fitted with longitudinal fins with the attempts to evaluate the heat transfer augmentation generated by the longitudinal fins and to develop the heat transfer correlation for the design of piston cooling system. The circumferential heat transfer distributions along five cross-sections of the curved fin-tube were measured. Heat transfer tests were performed with five reciprocating frequencies of 0, 0.83, 1.25, 1.67 and 2 Hz for each tested Reynolds number of 5000, 10000, 1500

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Deorah, Shashank. "CFD Analysis of a vertical tube having internal fins for the Natural Convection." Thesis, 2012. http://ethesis.nitrkl.ac.in/3330/1/Thesis.pdf.

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The heat transfer rate to a fluid flowing in pipe can be enhanced by the use of internal fins. This thesis concerned with computer simulation study of vertical tube with helical fins used to enhance their heat transfer performance subjected to natural convection heat transfer. All the main parameters which can significantly influence the heat transfer performance of finned tube has been analyzed. Natural convection in a vertical tube without fins was taken as the reference tube and different fin patterns such as a single fin with large no. of turns like coiled shape and large no. of fins with

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Nangia, Aniket. "CFD analysis of a vertical tube with external helical fins in natural convection." Thesis, 2012. http://ethesis.nitrkl.ac.in/3244/1/108ME060_ANIKET_NANGIA_THESIS.pdf.

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Convective heat transfer between a surface and the surrounding fluid in a heat exchanger has been a major issue and a topic of study for a long time. In this study, an attempt has been made to study the effect of various fin configurations on the total heat transfer from a vertical tube. The temperature contours, velocity vectors, surface nusselt number, total heat transfer rate from the fins as well as wall of the tube were calculated and plotted using ANSYS 13.0. The Navier-stokes equations were used to solve for the fluid flow inside the tube and the Boussinesq approximation was used to mod

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Yun-LungChung and 鍾昀龍. "An Inverse Design Problem in Estimating the Optimal Shape of the Annular Fins Adhered to a Bare Tube of an Evaporator." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/283296.

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博士<br>國立成功大學<br>系統及船舶機電工程學系<br>104<br>This dissertation is intended to find an optimum shape and fin efficiency of annular fin adhere to the bare tube of evaporator for the air conditioner when considering the thermal properties of fin are either constant or temperature-dependent. It uses the conjugate gradient method (CGM) of inverse heat conduction problem to design an optimum annular fin based on the desired fin efficiency and fin volume. The amount of vapor in the ambient air influences fin shape a lot, as a result, it needs to consider the specific humidity when the optimum annular fin sh

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Ravi, Gurunarayana. "Study of Laminar Flow Forced Convection Heat Transfer Behavior of a Phase Change Material Fluid." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-231.

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The heat transfer behavior of phase change material fluid under laminar flow conditions in circular tubes and internally longitudinal finned tubes are presented in this study. Two types of boundary conditions, including uniform axial heat flux with constant peripheral temperature and uniform axial and peripheral temperature, were considered in the case of circular tubes. An effective specific heat technique was used to model the phase change process assuming a hydrodynamically fully-developed flow at the entrance of the tube. Results were also obtained for the phase change process under hydro

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Books on the topic "HTF TUBE WITH FINS"

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Heat transfer and pressure drop performance of a finned-tube heat exchanger proposed for use in the NASA Lewis altitude wind tunnel. National Aeronautics and Space Administration, Lewis Research Center, 1985.

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Book chapters on the topic "HTF TUBE WITH FINS"

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Nishi, M., X. M. Wang, K. Yoshida, T. Takahashi, and T. Tsukamoto. "An Experimental Study on Fins, Their Role in Control of the Draft Tube Surging." In Hydraulic Machinery and Cavitation. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_92.

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Luo, Jiaen, Zhaosong Fang, Lan Tang, and Zhimin Zheng. "Numerical Simulation of Heat Transfer and Pressure Drop Characteristics of Elliptical Tube Perforated Fins Heat Exchanger." In Environmental Science and Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9524-6_35.

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Saha, Sujoy Kumar, Hrishiraj Ranjan, Madhu Sruthi Emani, and Anand Kumar Bharti. "Oval and Flat Tube Geometries, Row Effects in Tube Banks, Local Heat Transfer Coefficient on Plain Fins, Performance Comparison, Numerical Simulation and Patents, Coatings." In Heat Transfer Enhancement in Externally Finned Tubes and Internally Finned Tubes and Annuli. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20748-9_5.

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Beura, S., R. Ray, U. K. Mohanty, and Dhirendra Nath Thatoi. "Heat Transfer in the Annular Region of a Double Tube Heat Exchanger with Continuous Longitudinal Rectangular Fins Under Turbulent Flow Condition." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4795-3_43.

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Chedid, Teddy, Erwin Franquet, Jérôme Pouvreau, Pierre Garcia, and Jean-Pierre Bédécarrats. "Numerical Study of the Influence of Fins’ Geometry on the Thermal Performances of a Vertical Shell and Tube Latent Heat Thermal Energy Storage." In Atlantis Highlights in Engineering. Atlantis Press International BV, 2023. http://dx.doi.org/10.2991/978-94-6463-156-2_8.

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Taler, Dawid, Jan Taler, and Marcin Trojan. "The CFD Based Method for Determining Heat Transfer Correlations on Individual Rows of Plate-Fin and Tube Heat Exchangers." In Heat Transfer - Design, Experimentation and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97402.

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The chapter provides an analytical mathematical model of a car radiator, which includes different heat transfer coefficients (HTCs) on the first and second row of pipes. The air-side HTCs in the first and second row of pipes in the first and second pass were calculated using the correlations for the Nusselt number, which were determined by CFD simulation using the ANSYS software. Mathematical models of two radiators were built, one of which was manufactured of round tubes and the other of oval tubes. The model permits the determination of thermal output of the first and second row of tubes in the first and second pass. The small relative differences between the thermal capacities of the heat exchanger occur for different and uniform HTCs. However, the heat flow rate in the first row is much greater than the heat flow in the second row if the air-side HTCs are different on the first and second tube row compared to a case where the HTC is uniform in the whole heat exchanger. The heat transfer rates in both radiators calculated using the developed mathematical model were compared with those determined experimentally. The method for modeling of plate-fin and tube heat exchanger (PFTHE) proposed in the paper does not require empirical correlations to calculate HTCs both on the air side and on the inner surfaces of pipes. The presented method of calculating PFTHEs, considering different air-side HTCs evaluated using CFD modeling, may considerably reduce the cost of experimental research concerning new design heat exchangers implemented in manufacturing.

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"41 Economizer tube solid or serrated fins." In Industrial Water Tube Boiler Design. De Gruyter, 2021. http://dx.doi.org/10.1515/9783110757088-041.

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"Robert D. Reed Low Fins in Shell-and-Tube Exchangers." In Heat Transfer Design Methods. CRC Press, 1991. http://dx.doi.org/10.1201/9781482277050-8.

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Nhan Phan, Thanh. "A Review on Condensation Process of Refrigerants in Horizontal Microfin Tubes: A Typical Example." In Heat Transfer [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105875.

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Heat transfer performance of refrigerant on the condensation process is very important in the designing of condensation equipment, especially in air conditioning and refrigeration systems. The outstanding advantages of microfin tubes are reducing the weight and size of condensers and also reducing the amount of refrigerant on the system. Reviewing the general concept of condensation and detailing the formation of flow pattern map that is also the procedure to determine heat transfer coefficient and pressure drop during condensation process of refrigerant inside the horizontal microfin tubes would be considered. Also, a typical example will be presented to illustrate a detailed procedure to calculate the value of heat transfer coefficient and pressure drop during the condensation process in horizontal microfin tubes. The data results show that microfin tube J60 with 60 number of fins inside 8.96 mm inner diameter, 0.2 mm height of fin, 40o of apex angle and 18o of helix angle, the condensation procedure of R1234ze at 35°C, heat flux of 8.62 kW/m2, and mass flux of 222 kg/m2s that could be estimated with heat transfer coefficient would be reduced from 8160.4 [W/m2 K] to 1413.8 [W/m2 K] follow with quality x changes from 0.99 to 0.01, and the maximum pressure drop of this process is 3173.8 [Pa/m].

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Conference papers on the topic "HTF TUBE WITH FINS"

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Kozak, Y., T. Rozenfeld, and G. Ziskind. "Analysis of a Latent Heat Storage Device With Radial Fins." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18103.

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Phase-change materials (PCMs) can store large amounts of heat without significant change of their temperature during the phase-change process. This effect may be utilized in thermal energy storage, especially for solar-thermal power plants. In order to enhance the rate of heat transfer into PCMs, one of the most common methods is the use of fins which increase the heat transfer area that is in contact with the PCM. The present work deals with a latent heat thermal storage device that uses a finned tube with an array of radial fins. A heat transfer fluid (HTF) flows through the tube and heat is

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Lim, Celine S. L., Vivek R. Pawar, and Sarvenaz Sobhansarbandi. "Thermal Performance Analysis of a Novel U-Tube Evacuated Tube Solar Collector." In ASME 2020 14th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/es2020-1674.

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Abstract Solar water heating (SWH) systems are the most common application of renewable energy technology that converts solar radiation into useful energy for domestic/industrial activities. The novelty of this study is the design of a new SWH that combines the heat transfer and storage both in a single unit. The selected type of collector for this purpose is an evacuated tube solar collector (ETC). The new design of the ETC has been developed by applying a U-tube inside the collector which contains the heat transfer fluid (HTF). The HTF flows into an external heat exchanger that transfers hea

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Alnaimat, Fadi, Bobby Mathew, Abdel-Hamid I. Mourad, and S. A. B. Al Omari. "Modeling and Simulation of Thermal Energy Storage for Solar Energy Utilization." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10326.

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Abstract A significant research has been done on the enhancement of thermal energy storage systems. This article details the numerical study conducted to understand the heat transfer and fluid flow characteristics of a concentric thermal energy storage subjected to different heat transfer fluid (HTF) velocities. Water is used as the working heat transfer fluid. The influence of flow parameter primarily the HTF velocity is studied in this article. Studies are conducted for concentric thermal energy storage diameter of 25 mm, and 10 mm inner diameter of concentric pipe, 200 mm length, and HTF ve

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Romero-Méndez, Ricardo, Rafael Adame, and Mihir Sen. "Parametric Study of Conjugate Heat Transfer in a Plate-Fin and Tube Heat Exchanger." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/htd-24113.

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Abstract A finite element code is used to analyze the conjugate heat transfer over the external side of a single-row plate-fin and tube heat exchanger. The conditions for which the simulations are conducted are similar to those of real plate-fin and tube heat exchangers where both conduction through the fins and convection over them are present. The influence of several parameters on the temperature distribution and local heat transfer is analyzed. From the simulations it is seen that the region of high heat transfer that appears in the leading edge of the fins is the most affected by the fini

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Khan, Zakir, and Zulfiqar Ahmad Khan. "Development in Paraffin Based Thermal Storage System Through Shell and Tubes Heat Exchanger With Vertical Fins." In ASME 2017 11th International Conference on Energy Sustainability collocated with the ASME 2017 Power Conference Joint With ICOPE-17, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/es2017-3276.

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Researchers are committed to develop robust and responsive technologies for renewable energy sources to avert from reliance on fossil fuels, which is the main cause of global warming and climate change. Solar energy based renewable energy technologies are valued as an important substitute to bridge gap between energy demand and generation. However, due to varying and inconsistent nature of solar energy during weather fluctuations, seasonal conditions and night times, the complete utilisation of technology is not guaranteed. Therefore, thermal energy storage (TES) system is considered as an imp

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Koyama, Shigeru, Ken Kuwahara, and Koichi Nakashita. "Condensation of Refrigerant in a Multi-Port Channel." In ASME 2003 1st International Conference on Microchannels and Minichannels. ASMEDC, 2003. http://dx.doi.org/10.1115/icmm2003-1021.

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In the present paper, the local characteristics of pressure drop and heat transfer are investigated experimentally for the condensation of pure refrigerant R134a in four kinds of multi-port extruded aluminum tubes of about 1 mm in hydraulic diameter. Two tubes are composed of plane rectangular channels, while remaining two tubes are composed of rectangular channels with straight micro-fins. The experimental data of frictional pressure drop (FPD) and heat transfer coefficient (HTC) in plane tubes are compared with previous correlations, most of which are proposed for the condensation of pure re

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Christian, Joshua M., Jesus D. Ortega, and Clifford K. Ho. "Novel Tubular Receiver Panel Configurations for Increased Efficiency of High-Temperature Solar Receivers." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49431.

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Typical Concentrated Solar Power (CSP) central receiver power plants require the use of either an external or cavity receiver. Previous and current external receivers consist of a series of tubes connected to manifolds that form a cylindrical or rectangular shape such as in the cases of Solar One, Solar Two, and most recently the Ivanpah solar plant. These receivers operate at high surface temperatures (>600°C) at which point thermal re-radiation is significant. However, the geometric arrangement of these heat transfer tubes results in heat losses directly to the environment. This work focu

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Sciacovelli, Adriano, Vittorio Verda, and Francesco Colella. "Numerical Investigation on the Thermal Performance Enhancement in a Latent Heat Thermal Storage Unit." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82720.

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Abstract:

The present paper describes the application of computational fluid-dynamics (CFD) for the analysis of the melting process in a single vertical shell-and-tube heat exchanger. The computations are based on a 2D axial-symmetric model that takes in account the phase change phenomenon by means of the enthalpy method. The numerical studies aimed at clarifying the importance of the different heat transfer mechanisms with a particular focus on natural convection demonstrating its fundamental importance on the phase change process by enhancing the heat transfer between HTF and solid PCM. the paper disc

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Zhang, Y. H., J. Liu, Liang-Bi Wang, and Zhi-Min Lin. "THT FIN SIDE FLOW AND HEAT TRANSFER CHARACTERISTICS OF CIRCULAR TUBE BANK FIN HEAT EXCHANGER WITH THE TRANGULARWAVY FINS." In Second Thermal and Fluids Engineering Conference. Begellhouse, 2017. http://dx.doi.org/10.1615/tfec2017.hte.017645.

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Akarsh, A., and Sumer Dirbude. "Heat transfer enhancement in a PCM-based shell-and-tube-type thermal-energy storage device with nano-particle enhancement, addition of triangular annular fins, fin pitch, and HTF flow reversal." In Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India. Begellhouse, 2022. http://dx.doi.org/10.1615/ihmtc-2021.2030.

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