International Journal of Thermophysics最新文献_第3页

Measurements of the Viscosity of n-Hydrogen and (n-Hydrogen + Carbon Dioxide), (n-Hydrogen + Methane), and (n-Hydrogen + Ethane) Mixtures at Temperatures from (253.15 to 473.15) K and at Pressures up to 20 MPa

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-03-03 DOI: 10.1007/s10765-024-03492-3

Benjamin Betken, Bahareh Khosravi, Fabian Sabozin, Monika Thol, Roland Span

{"title":"Measurements of the Viscosity of n-Hydrogen and (n-Hydrogen + Carbon Dioxide), (n-Hydrogen + Methane), and (n-Hydrogen + Ethane) Mixtures at Temperatures from (253.15 to 473.15) K and at Pressures up to 20 MPa","authors":"Benjamin Betken, Bahareh Khosravi, Fabian Sabozin, Monika Thol, Roland Span","doi":"10.1007/s10765-024-03492-3","DOIUrl":"10.1007/s10765-024-03492-3","url":null,"abstract":"<div><p>Viscosity measurements of normal hydrogen (<i>n</i>-hydrogen) and four (<i>n</i>-hydrogen + carbon dioxide), four (<i>n</i>-hydrogen + methane), and two (<i>n</i>-hydrogen + ethane) binary mixtures at temperatures between (253.15 and 473.15) K and at pressures up to 20 MPa are presented. The relative expanded combined uncertainty (<i>k</i> = 2) in terms of viscosity ranges between (0.47 and 0.70) %. The nominal compositions of the gravimetrically prepared mixtures are (10, 20, 40, and 60) mol-% carbon dioxide, (10, 25, 50, and 75) mol-% methane, and (10 and 50) mol-% ethane, respectively. For the measurements, a rotating-body viscometer was used, which is based on the utilization of a magnetic suspension coupling to allow for a contactless and, thus, ideally frictionless suspension of the rotating-body. To provide experimental data with low experimental uncertainty, a relative measurement approach was applied, with helium as reference fluid. The measurement results are compared to experimental data, ab initio-calculated data, and viscosity correlations from the literature. Furthermore, zero-density viscosities are provided, which were obtained from a quadratic expansion in terms of the density fitted to the experimental data. Relative deviations of the pure fluid viscosities for <i>n</i>-hydrogen reported in this work are between (− 0.033 and 0.45) % from the corresponding viscosity correlation and zero-density viscosities for <i>n</i>-hydrogen deviate by (− 0.010 to 0.23) % from the most accurate data found in the literature.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03492-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Thermal Conductivity Measurements for the Hydrofluoroolefin R1225ye(Z)

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-03-03 DOI: 10.1007/s10765-025-03530-8

G. Lombardo, D. Menegazzo, L. Vallese, M. Scattolini, S. Bobbo, L. Fedele

{"title":"Experimental Thermal Conductivity Measurements for the Hydrofluoroolefin R1225ye(Z)","authors":"G. Lombardo, D. Menegazzo, L. Vallese, M. Scattolini, S. Bobbo, L. Fedele","doi":"10.1007/s10765-025-03530-8","DOIUrl":"10.1007/s10765-025-03530-8","url":null,"abstract":"<div><p>In the pursuit of a fourth generation of refrigerants characterized by zero Ozone Depletion Potential and remarkably low Global Warming Potential (GWP), as mandated by EU Regulation No 517/2014 and the Kigali Amendment to the Montreal Protocol, natural refrigerants and hydrofluoroolefins (HFOs) have emerged as the most promising long-term alternatives. Notably, the hydrofluoroolefin cis-1,2,3,3,3-pentafluoroprop-1-ene R1225ye(Z) and its isomers have been considered as environmentally friendly options to replace the widely used R410A in refrigeration applications, both in pure form and blends, due to their similar characteristic pressures and temperatures. However, despite its GWP being lower than 3, studies on the toxicological effects of R1225ye(Z) have prevented its applications in industrial contexts, discouraging the study of its thermophysical properties. To date, the available literature offers only a limited amount of experimental data on the thermophysical properties of R1225ye(Z), with none specifically addressing its thermal conductivity. Thus, this study addresses this gap by presenting a comprehensive dataset of 68 experimental thermal conductivity measurements, performed employing a double transient hot-wire apparatus along eleven isotherms spanning temperatures from 243.15 to 343.15 K, encompassing pressures ranging from close to vapor pressure up to 8 MPa. A simplified correlation for estimating the thermal conductivity at saturation state was developed using the extrapolation method. Then, the experimental thermal conductivity data were compared with a generalized model for liquid thermal conductivity in HFOs, demonstrating good agreement with calculated values (AAD 2.3%), in line with the declared model accuracy.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03530-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Passive Radiative Cooling Materials with Special Focus on the Reduction of Urban Heat Island Effect: A Current Summarized Classification of Need, Approaches and Characterization Methods

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-03-03 DOI: 10.1007/s10765-025-03529-1

Jochen Manara, Jürgen Hartmann, Fabian Kerwagen, Christoph Maack, Alberto Muscio, Heiko Paeth, Hans-Peter Ebert

{"title":"Passive Radiative Cooling Materials with Special Focus on the Reduction of Urban Heat Island Effect: A Current Summarized Classification of Need, Approaches and Characterization Methods","authors":"Jochen Manara, Jürgen Hartmann, Fabian Kerwagen, Christoph Maack, Alberto Muscio, Heiko Paeth, Hans-Peter Ebert","doi":"10.1007/s10765-025-03529-1","DOIUrl":"10.1007/s10765-025-03529-1","url":null,"abstract":"<div><p>Rapidly rising global temperatures and the intensification of the urban heat island (UHI) effect necessitate new, energy-efficient solutions to mitigate heat stress in cities. Passive radiative cooling (PRC) offers a highly promising, low-energy pathway to achieve sub-ambient temperatures by reflecting incoming solar radiation while emitting long-wave infrared radiation through the atmospheric infrared window. This review summarizes key aspects of PRC and its role in reducing UHI impacts. Furthermore the fundamental physics of heat transfer and radiative heat exchange, including the materials properties such as solar reflectance and thermal emissivity which are correlated with the figures of merit, temperature drop below ambient temperature and cooling power. A comprehensive classification of current PRC materials is presented based on both structural architectures and physical effects. Additionally an overview on measurement techniques are employed to determine the performance of PRC materials, focusing on the key performance indicators. For this purpose in-field as wells as laboratory measurement techniques are introduced and opportunities in standardizing testing protocols are highlighted. Finally, future research directions are outlined, focusing on novel material development, theoretical advancements, scalable fabrication processes, and integration strategies within urban infrastructures. These innovations are important for enhancing building energy efficiency, reducing urban heat stress, and promoting sustainable urban development in the face of climate change.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the LKP-SJT Equation of State: Application to Alkanes, Carbon Dioxide, and Their Mixtures

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-28 DOI: 10.1007/s10765-024-03493-2

Fabian Sabozin, Marcel Felix Schneegans, Andreas Jäger, Monika Thol

{"title":"Improving the LKP-SJT Equation of State: Application to Alkanes, Carbon Dioxide, and Their Mixtures","authors":"Fabian Sabozin, Marcel Felix Schneegans, Andreas Jäger, Monika Thol","doi":"10.1007/s10765-024-03493-2","DOIUrl":"10.1007/s10765-024-03493-2","url":null,"abstract":"<div><p>The recently introduced modification of the Lee-Kesler-Plöcker equation of state, LKP-SJT, has been further developed, and the results are presented. The new version includes an enhancement of the original approach for calculating the compressibility factor at the critical point. Furthermore, the standard fluid combination used as base points for interpolation has been varied. The results of these calculations are compared with datasets generated from highly accurate equations of state in terms of the Helmholtz energy and with experimental measurements. The investigated fluids include alkanes and carbon dioxide. In comparison to the original version of the LKP-SJT equation of state, improvements were achieved for <i>n</i>-alkanes up to <i>n</i>-dodecane and carbon dioxide. The calculated densities of long-chain alkanes are significantly more accurate, while vapor pressures are less precise. The application of the LKP-SJT to propane - <i>n</i>-alkane and carbon dioxide - <i>n</i>-alkane mixtures up to <i>n</i>-decane confirms its benefits in the density calculation of long-chained alkanes and hence asymmetric mixtures. Calculations of the liquid density for the propane -<i> n</i>-eicosane mixture performed to estimate the extrapolation behavior yield promising results.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-024-03493-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vapor–Liquid Equilibrium Measurement for Carbon Dioxide (CO2) + 2,3,3,3-Tetrafluoropropylene (R1234yf) Binary Mixtures

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-27 DOI: 10.1007/s10765-025-03508-6

Zirui Wu, Lingfeng Shi, Peng Hu, Hua Tian, Xuan Wang, Gequn Shu

{"title":"Vapor–Liquid Equilibrium Measurement for Carbon Dioxide (CO2) + 2,3,3,3-Tetrafluoropropylene (R1234yf) Binary Mixtures","authors":"Zirui Wu, Lingfeng Shi, Peng Hu, Hua Tian, Xuan Wang, Gequn Shu","doi":"10.1007/s10765-025-03508-6","DOIUrl":"10.1007/s10765-025-03508-6","url":null,"abstract":"<div><p>CO<sub>2</sub>-based binary mixtures offer superior thermodynamic advantages and environmental benefits compared to alternative working fluids. Enthalpy and entropy are essential in thermodynamic analysis, necessitating the availability of vapor–liquid equilibrium data. The static thermostatic analysis system accurately measures the mixtures’ temperature, pressure, and molar fractions. We carry out five temperatures at 283.15 K to 323.15 K while maintaining a pressure of approximately 6.38 MPa. Two electromagnetic capillary samplers effectively extract working fluids from the equilibrium cell, facilitating precise analysis using a gas chromatograph. The standard measurement uncertainties of experimental temperature, mole fractions, and pressure are determined at 0.06 K, 0.004, and 0.002 MPa, ensuring precise and reliable data for our analysis. The experimental data we gathered has undergone extensive analysis and modeling using the PR + WS + NRTL model to offer a comprehensive insight into the system's behavior. The AARD<i>p</i> value is 0.81%, whereas AAD<i>y</i><sub>1</sub> demonstrates merely a slight variance of 0.0047. The relative volatility is determined at five temperatures ranging from 283.15 K to 323.15 K. The majority of the experimental data falls within the ± 5% deviation boundary, affirming their reliability.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Density, Normal Spectral Emissivity, Heat Capacity, and Thermal Conductivity of the Ti6Al4V Melt Measured by Electromagnetic Levitation with a Static Magnetic Field

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03521-9

Manabu Watanabe, Suguru Funada, Makoto Ohtsuka, Masayoshi Adachi, Hiroyuki Fukuyama

{"title":"Density, Normal Spectral Emissivity, Heat Capacity, and Thermal Conductivity of the Ti6Al4V Melt Measured by Electromagnetic Levitation with a Static Magnetic Field","authors":"Manabu Watanabe, Suguru Funada, Makoto Ohtsuka, Masayoshi Adachi, Hiroyuki Fukuyama","doi":"10.1007/s10765-025-03521-9","DOIUrl":"10.1007/s10765-025-03521-9","url":null,"abstract":"<div><p>This study aimed to accurately measure the density (<i>ρ</i>), normal spectral emissivity (<i>ε</i>), heat capacity at constant pressure (<i>C</i><sub><i>p</i></sub>), and thermal conductivity (<i>κ</i>) of the Ti–6 mass % Al–4 mass % V (Ti64) melt by electromagnetic levitation with a static magnetic field and laser modulation calorimetry. A static magnetic field was applied to the levitated Ti64 melt to suppress the surface oscillation and translational motion of the droplets, and to suppress the convection flow inside the droplet for each property measurement, as needed. The measurement uncertainty was analyzed for all of the thermophysical property data. The excess volume and excess heat capacity of the Ti64 melt obtained in this study were compared with those evaluated using the ideal solution model. The contribution of the thermal vibrations of the atoms in <i>κ</i> for the Ti64 melt was evaluated from the difference between the measured thermal conductivity (<i>κ</i>) value and the <i>κ</i> values calculated using the Wiedemann–Franz law.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03521-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gaseous PVTx Properties for the Binary System 1,1,2,3,3,3-Hexafluoro-1-Propene(R1216) + Trans-1,3,3,3-Tetrafluoropropene(R1234ze(E))

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03522-8

Wenhui Wang, Yuande Dai, Jin Liu

{"title":"Gaseous PVTx Properties for the Binary System 1,1,2,3,3,3-Hexafluoro-1-Propene(R1216) + Trans-1,3,3,3-Tetrafluoropropene(R1234ze(E))","authors":"Wenhui Wang, Yuande Dai, Jin Liu","doi":"10.1007/s10765-025-03522-8","DOIUrl":"10.1007/s10765-025-03522-8","url":null,"abstract":"<div><p>In this paper, based on the principle of the Burnett isothermal expansion method, the P-ρ-T data for the R1216/R1234ze(E) mixture, with molar fractions of R1216 at 0.330, 0.564, and 0.786, were measured using a high-precision PVT test bench over a temperature range of 303.15 K to 333.15 K and a pressure range of 0.1 MPa to 1.7 MPa. The uncertainties in the experimental measurements are estimated to be within ± 1.4 kPa for pressure, ± 15 mK for temperature, and ± 0.2 % for molar fraction. Based on the experimental data, the relationship between the second and third Virial coefficients of the mixture R1216 / R1234ze(E) and temperature is fitted, and the Virial equation of state that can realize the high-precision calculations of the fundamental thermal properties of the gas phase of the mixture is obtained. The maximum relative deviation between the pressure values calculated by this equation and the experimental data is only 0.9 %, which verifies the accuracy and reliability of the Virial equation of state for calculating the basic thermophysical properties of R1216/R1234ze(E). This study provides detailed experimental data and reliable computational models for the thermodynamic performance of the new mixed refrigerant, as well as for other application studies.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposal for a Thermal Diode with Low-Environmental-Impact Materials for Thermosolar Applications

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03513-9

Herminio Rebollo Sandoval, Luis Mariano Hernández Ramírez, Luis Bernardo López-Sosa

{"title":"Proposal for a Thermal Diode with Low-Environmental-Impact Materials for Thermosolar Applications","authors":"Herminio Rebollo Sandoval, Luis Mariano Hernández Ramírez, Luis Bernardo López-Sosa","doi":"10.1007/s10765-025-03513-9","DOIUrl":"10.1007/s10765-025-03513-9","url":null,"abstract":"<div><p>A thermal diode is a component that allows heat flow in one direction while opposing it in the opposite direction. Its applications are wide, for example, it has recently been used for solar energy harvesting and in solar thermal technologies. This work studies a coating made with biomass soot and pine resin, which absorbs and stores captured energy with a preferential heat flow system. The research consists of 3 stages: (a) evaluating the thermal conductivity of soot through experimental arrangements with simple materials and equipment, (b) estimating the thermal rectification of the coating, and (c) applying the soot as a thermal diode in a small-scale system. The results show thermal conductivity values from 0.070 W·mK<sup>−1</sup> to 0.095 W·mK<sup>−1</sup> for the soot-resin coating, while the rectification factor was 21 % and 53 % for the best coating of 30 % soot–70 % pine resin and the double layer with 10 % soot and 90 % resin, respectively. The soot coating in a small-scale system showed thermal rectification associated with energy charging and discharging, with energy collection efficiency of 34 % and retention efficiency of 17 %. Compared to low-cost paint used in solar technologies, 31.4 % collection efficiency and 8.4 % retention efficiency were achieved. The coating is low-cost, environmentally friendly, and easy to reproduce, showing promise for use in low-power solar thermal technologies, to increase energy storage capacity as a thermal diode.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Diffusivity Measurements for High Thermal Conductive Materials by Applying Undersampling to Lock-in Thermography

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-25 DOI: 10.1007/s10765-025-03523-7

Yudai Kaneko, Ryohei Fujita, Takuya Ishizaki, Hosei Nagano

{"title":"Thermal Diffusivity Measurements for High Thermal Conductive Materials by Applying Undersampling to Lock-in Thermography","authors":"Yudai Kaneko, Ryohei Fujita, Takuya Ishizaki, Hosei Nagano","doi":"10.1007/s10765-025-03523-7","DOIUrl":"10.1007/s10765-025-03523-7","url":null,"abstract":"<div><p>In this study, a method employing lock-in thermography is proposed for measuring the thermal diffusivity distribution of materials with high thermal conductivity. In this method, the thermal response distribution induced by periodic laser heating is analyzed, and the thermal diffusivity in the out-of-plane direction over the material surface is mapped. An undersampling method is applied during lock-in thermography to measure the thermal diffusivity distribution of materials with low thermal resistance at high frequencies. Additionally, a principle is developed to eliminate the inherent phase lag generated by the measurement system. The accuracy of the proposed method is validated by quantitatively measuring the thermal diffusivity of a pure copper sheet that exhibits an isotropic thermal diffusivity distribution. Results reveal that its average thermal diffusivity agreed with the reference value within + 2.4 %. The proposed method is also used to measure the thermal diffusivity of an isotropic graphite sheet with an inhomogeneous thermal diffusivity distribution. Results reveal that its average thermal diffusivity agreed with the reference value within + 7.0 %, and local areas with high thermal diffusivity are successfully visualized.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Investigation of Solar Bubble Pump to Lift Water

IF 2.5 4区工程技术

International Journal of Thermophysics Pub Date : 2025-02-19 DOI: 10.1007/s10765-025-03519-3

Ihab Omar, Dhuha Radhi Nayyef, Ahmed Mohammed Jamal AMRLE, Ahmed A. M. Saleh

{"title":"Theoretical Investigation of Solar Bubble Pump to Lift Water","authors":"Ihab Omar, Dhuha Radhi Nayyef, Ahmed Mohammed Jamal AMRLE, Ahmed A. M. Saleh","doi":"10.1007/s10765-025-03519-3","DOIUrl":"10.1007/s10765-025-03519-3","url":null,"abstract":"<div><p>In various engineering applications, particularly pumping systems, two-phase flows that involve the simultaneous flow of two different states of matter are widely employed. For instance, in industrial settings, the utilization of an airlift pump is common for transferring air or other gases to lift liquid. Conversely, in diffusion-absorption refrigeration cycles, a bubble pump is employed to create a two-phase flow through fluid boiling. To comprehend the impact of design and operational parameters on the lift water bubble pump, a comprehensive theoretical study was undertaken. The engineering equation solver (EES) was utilized in this investigation to examine the influence of lift pipe diameter, heat flux, and mass flux on the performance of the bubble pump. The study’s findings revealed that a single set of optimal conditions and values cannot be universally applicable to the bubble pump. This is because each system possesses unique characteristics and operational parameters, leading to a distinct set of optimized parameters. The theoretical study on the lift water bubble pump underscores the significance of considering design and operational parameters while developing and operating pumping systems that employ two-phase flow. Moreover, it emphasizes the necessity for extensive research to establish optimal conditions and values tailored to the specific characteristics and operating parameters of each individual system.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"46 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10765-025-03519-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0