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Literatura académica sobre el tema "R1233zd(E)"

Autor: Grafiati

Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "R1233zd(E)"

Li, Shengyu y Jun Lu. "A Theoretical Comparative Study of Vapor-Compression Refrigeration Cycle using Al2O3 Nanoparticle with Low-GWP Refrigerants". Entropy 24, n.º 12 (13 de diciembre de 2022): 1820. http://dx.doi.org/10.3390/e24121820.

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Nanorefrigerant is a mixture of nanoparticles and pure refrigerant, which can increase heat transfer characteristics in refrigeration and air conditioning equipment. The performance of four different Al2O3 nanorefrigerants and their pure fluids (R600a, R134a, R1234yf, and R1233zd(E)) is analyzed in a vapor-compression refrigeration cycle. The enthalpy of a nanorefrigerant in the refrigeration cycle is calculated by using the prediction method based on the density of nanorefrigerant. A numerical model is established for the thermodynamic analysis, and the results show that adding nanoparticles to the pure refrigerant enhances heat transfer in heat exchangers, increases cooling capacity, reduces compressor power consumption, and finally improves the performance of the refrigeration system. The COP improvement of R1233zd(E) + Al2O3 nanorefrigerant is the highest, and the COP improvement of R134a + Al2O3 and R1234yf + Al2O3 are close to each other. When the mass fraction of Al2O3 nanoparticles increases to 0.30%, the COP of R1233zd(E) and R600a increases by more than 20%; the maximum exergy efficiency is 38.46% for R1233zd(E) + Al2O3, and the minimum exergy efficiency is 27.06% for pure R1234yf. The results provide a basis for the application of nanorefrigerants in the vapor compression refrigeration cycle.

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Liu, Yu y Xiaoming Zhao. "Measurement of the heat capacity of R1233zd(E)". International Journal of Refrigeration 86 (febrero de 2018): 127–32. http://dx.doi.org/10.1016/j.ijrefrig.2017.11.015.

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Lee, Keon Hu, Seok Ho Yoon, Chan Ho Song, Ook Joong Kim y Dong Ho Kim. "An Experimental Study on Material Compatibility of R1233zd(E) with Lubricant/Polymers". Korean Journal of Air-Conditioning and Refrigeration Engineering 31, n.º 11 (30 de noviembre de 2019): 497–505. http://dx.doi.org/10.6110/kjacr.2019.31.11.497.

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Racovitza, Alexandru, Horatiu Pop, Valentin Apostol, Tudor Prisecaru y Daniel Taban. "Comparison between Organic Working Fluids in order to Improve Waste Heat Recovery from Internal Combustion Engines by means of Rankine Cycle Systems". Revista de Chimie 71, n.º 1 (7 de febrero de 2020): 113–21. http://dx.doi.org/10.37358/rc.20.1.7821.

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The present works deals with waste heat recovery from internal combustion engines using Rankine cycle systems where working fluid are organic liquids (ORC). The first part of the paper presents the ORC technology as one of the most suitable procedure for waste heat recovery from exhaust gas of internal combustion engine (ICE). The particular engine considered in the present work is a turbocharged compression ignition engine mounted on an experimental setup. The working fluids for ORC system are: isobutene, propane, RE245fa2, RE245cb2, R245fa, R236fa, R365mfc, R1233zd(E), R1234yf and R1234ze(Z). Experimental data derived from the experimental setup has been used for 40%, 55% and 70% engine load. This papers focusses on superheating increment, on thermal efficiency and on net power output, obtained with each working fluids in Rankine cycle. Results point out the superheating increment that gives the highest thermal efficiency for each working fluid. The highest thermal efficiency is achieved in case of using R1233zd(E) as working fluid. In case of using R1233zd(E) as working fluid at 40 % load of the engine, the output power of the Rankine cycle is 3.6 kW representing 6.2 %, from the rated power at this load; at 55% load it is 5.7 kW representing 6.7 % the rated power and at 70% it is 6.7 kW representing 6.5 % from the rated power. Future perspectives are given.

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Elbarghthi, Anas F. A., Mohammad Yousef Hdaib y Václav Dvořák. "Heat Transfer Analysis between R744 and HFOs inside Plate Heat Exchangers". Entropy 24, n.º 8 (18 de agosto de 2022): 1150. http://dx.doi.org/10.3390/e24081150.

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Plate heat exchangers (PHE) are used for a wide range of applications, thus utilizing new and unique heat sources is of crucial importance. R744 has a low critical temperature, which makes its thermophysical properties variation smoother than other supercritical fluids. As a result, it can be used as a reliable hot stream for PHE, particularly at high temperatures. The local design approach was constructed via MATLAB integrated with the NIST database for real gases. Recently produced HFOs (R1234yf, R1234ze(E), R1234ze(Z), and R1233zd(E)) were utilized as cold fluids flowing through three phases: Liquid-phase, two-phase, and gas-phase. A two-step study was performed to examine the following parameters: Heat transfer coefficients, pressure drop, and effectiveness. In the first step, these parameters were analyzed with a variable number of plates to determine a suitable number for the next step. Then, the effects of hot stream pressure and cold stream superheating difference were investigated with variable cold channel mass fluxes. For the first step, the results showed insignificant differences in the investigated parameters for the number of plates higher than 40. Meanwhile, the second step showed that increasing the hot stream pressure from 10 to 12 MPa enhanced the two-phase convection coefficients by 17%, 23%, 75%, and 50% for R1234yf, R1234ze(E), R1234ze(Z), and R1233zd(E), respectively. In contrast, increasing the cold stream superheating temperature difference from 5 K to 20 reduced the two-phase convection coefficients by 14%, 16%, 53%, and 26% for R1234yf, R1234ze(E), R1234ze(Z), and R1233zd(E), respectively. Therefore, the R744 is suitable for PHE as a driving heat source, particularly at higher R744 inlet pressure and low cold stream superheating difference.

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Tsvetkov, O. B., V. V. Mitropov, A. O. Prostorova y Yu A. laptev. "Thermal conductivity prediction of Trans-1-Chloro-3,3,3-Trifluoropropene (R1233zd (E))". Journal of Physics: Conference Series 1683 (diciembre de 2020): 032021. http://dx.doi.org/10.1088/1742-6596/1683/3/032021.

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Righetti, Giulia, Giovanni A. Longo, Claudio Zilio, Ryo Akasaka y Simone Mancin. "R1233zd(E) flow boiling inside a 4.3 mm ID microfin tube". International Journal of Refrigeration 91 (julio de 2018): 69–79. http://dx.doi.org/10.1016/j.ijrefrig.2018.04.020.

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He, Jiacheng, Chaobin Dang y Eiji Hihara. "Supercritical heat transfer characteristics of R1233zd(E) in vertically upward flow". International Journal of Heat and Mass Transfer 127 (diciembre de 2018): 497–505. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.07.078.

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Kedzierski, M. A. y L. Lin. "Pool boiling of R515A, R1234ze(E), and R1233zd(E) on a reentrant cavity surface". International Journal of Heat and Mass Transfer 161 (noviembre de 2020): 120252. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.120252.

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Kondou, Chieko, Ryuichi Nagata, Noriko Nii, Shigeru Koyama y Yukihiro Higashi. "Surface tension of low GWP refrigerants R1243zf, R1234ze(Z), and R1233zd(E)". International Journal of Refrigeration 53 (mayo de 2015): 80–89. http://dx.doi.org/10.1016/j.ijrefrig.2015.01.005.

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Más fuentes

Tesis sobre el tema "R1233zd(E)"

Mahmoudian, Jafar. "Analytical and Experimental Evaluation of Ejector Refrigeration System using Environmentally Friendly Fluid". Doctoral thesis, 2020. http://hdl.handle.net/2158/1201684.

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During the recent years the interest of industry and scientific community in refrigeration systems working with natural fluids has considerably grown because of the more and more strict regulations regarding environmentally safe refrigerants. This thesis mainly describes a theoretical and experimental investi-gation of the jet pump refrigerator, and the application of Com-putational Fluid Dynamic (CFD) to validate the performance of the system. The present work is divided into two main parts plus introduction chapter which is devoted to literature reviews and theoretical concept of refrigeration system especially heat-powered ejector refrigeration cycle. Part I is devoted to the presentation of the results obtained with the industrial prototype developed by the University of Florence. Chapter 1 propose a detailed examina-tion of the phenomena occurring in the various ejector regions with R245fa as refrigerant. The knowledge and experience of these tests sets the basic to move on the new refrigerant, R1233zd, due to the same thermodynamic properties with the previous one and low GWP. The numerical and analytical mod-elling of the ejector validate the experimental results of the new refrigerant that is explored in Chapter 2. Part II is examined the fundamental study on water vapour con-densation inside a supersonic nozzle operated through shock tunnel. Chapter 3 is dedicated to this issue for the final goal of the Thermo Group which is substituting synthetic refrigerant with steam as the best natural and environmentally friendly fluid. Experimental data of the condensation shocks inside a nozzle and shock behavior through the tunnel was validated with the thermodynamic theoretical and recorded photos.

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Capítulos de libros sobre el tema "R1233zd(E)"

Jain, Pradeep Kumar, Akhilesh Arora y B. B. Arora. "Performance Analysis of ORC with Environment-Friendly Working Fluids Novec 649 and R1233zd[E] as Alternative to R245fa". En Lecture Notes in Civil Engineering, 55–67. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7557-6_5.

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Actas de conferencias sobre el tema "R1233zd(E)"

Amalfi, Raffaele L., Cong H. Hoang, Ryan Enright, John Kim, Filippo Cataldo, Jackson B. Marcinichen y John R. Thome. "Experimental Characterization of a Compact Thermosyphon Cooling System Operating with R1234ze(E) and R1233zd(E) Low-GWP Refrigerants". En 2022 21st IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm). IEEE, 2022. http://dx.doi.org/10.1109/itherm54085.2022.9899592.

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Alvarez-Regueiro, Eva, Bijie Yang, Esperanza Barrera-Medrano, Ricardo Martinez-Botas y Srithar Rajoo. "Optimisation of an ORC Radial Turbine Using a Reduced-Order Model Coupled With CFD". En ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-80944.

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Abstract This paper presents the geometry optimisation of a single stage radial turbine for an Organic Ranking Cycle system operating over a pressure ratio of 9. The specific fluid used in this investigation is R1233zd (E), but the methodology applies to other organic fluids as well. The ORC system is used to recover excess waste heat from the operation of an offshore oil and gas platform in the gulf of Thailand and its conditions will be replicated at pilot plant level. The geometry is optimised for the highest total-to-static efficiency using non gradient based algorithms to allow for wide design space. Firstly, a 1D meanline geometry is optimised, which is followed by a Computational Fluid Dynamics (CFD) optimisation in 3D using a parameterised model. CFD validate and calibrate the meanline model as well as to understand the flow and the sensitivity of the design parameters not captured by the low-order model. Moreover, the flow field of the successful designs is analysed by CFD to identify the main flow structures that explain the difference in performance among the designs. The real gas thermophysical properties of R1233zd (E) are calculated using equations of state to account for the non-ideal gas behaviour.

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Mwesigye, Aggrey y Seth B. Dworkin. "Energetic and Exergetic Performance Comparison of an Ejector Refrigeration System Using Modern Low GWP Refrigerants". En ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10542.

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Abstract In this study, a novel model is used to precisely predict the performance of an ejector refrigeration system utilizing modern environmentally benign working fluids in both the critical and subcritical modes of operation. Energetic and exergetic performance of low global warming potential and non-ozone depleting HCFO and HFO refrigerants: R1233zd(E), R1224yd(Z), R1225ye(Z), hydrocarbon refrigerants: Isobutane and Isopentane and RE245cb2 is compared with that of conventional refrigerants: R141b and R245fa. The model takes the ejector area ratios, generator pressure, and evaporator pressure into account in the determination of the ejector loss coefficients. A program written in Engineering Equation Solver (EES) was used to obtain solutions of the developed mathematical model. In the analysis, ejector area ratios between 6.44 and 12.76, evaporator temperatures between 4 and 16°C, condenser temperatures between 25 and 50°C as well as generator temperatures between 70 and 110°C were used. Results show that Isobutane and R1225ye(Z) have the greatest performance, giving an over 150% increase in the coefficient of performance (COP) compared to R245fa. The increase in the COP with isopentane, RE245cb2, R1224yd(Z) and R1233zd(E) were as high as 22%, 32%, 16% and 14%, respectively at the lowest area ratio. Results further show that the ejector contributes the highest exergy losses (up to 55%, depending on the evaporator, condensing and generator temperatures) compared to the other components. The contribution of the condenser to the total exergy loss is up to 28%, for the generator it is up to 34% and up to 12% for the evaporator. The pump and the throttle valve give values lower than 0.5 and 9%, respectively for all the refrigerants.

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Minazzo, Enzo M., Gautier Rouaze, Jackson B. Marcinichen, John R. Thome y L. Winston Zhang. "Compact and Highly Thermal-Hydraulic Efficient Air-Cooled Closed Loop Thermosyphon Cooling System for High Intense Heat Load Dissipation of Future Microprocessors". En ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/ipack2022-97364.

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Abstract A very compact air-cooled loop thermosyphon cooling system (LTS) was designed, prototyped and tested for microprocessor cooling application. It was designed specifically for 2U servers and heat loads up to 400 W in a footprint area of 40 mm per 40 mm. The low pressure and low GWP working fluid R1233zd(E) was used. Tests were done for two ambient temperatures (22 °C and 40 °C) and included optimal charge determination as well as extensive tests at optimal charge. Values of performance ratio, simply defined as heat load divided by fan power consumption, higher than 30 were observed for the maximum heat load of 400 W. The experimental results were also used to validate JJ Cooling Innovation’s inhouse proprietary solver developed to design the LTS and results will be presented.

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Tang, Weiyu, Wei Li y Jianxin Zhou. "Evaluation of Frictional Pressure Drop Correlations During Flow Boiling of Refrigerants in Micro-Fin Tubes". En ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20130.

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Abstract Due to the widely commercial application of micro-fin tube and eco-friendly refrigerants, more general frictional pressure drop correlations is demanded for better prediction, and this study is aimed at compared existing correlations and provide guides for the furthermore improvement. Experimental data points for frictional pressure drop during flow boiling of refrigerants in horizontal micro-fin tubes were extracted from literature and our previous experimental work to evaluate numerous existing frictional pressure drop correlations and specify their applicability to meet the urgent demand of extensive application of eco-friendly refrigerants. The database consists of 949 data points covering eleven refrigerants (R1233zd(Z), R410A, R1234ze(E), R410A, R22, R32, R1234ze(Z), R22, R134a, R245fa and R1234yf included), and the involved operation conditions are as follows: mass velocity 94–888 kg m−2s−1, vapor quality 0.04–0.99, heat flux 3.9–85.2 kW m−2, and equivalent diameter 2.12–11.84mm. Eight existing general frictional pressure drop correlation including Cavallini et al., Kuo and Wang, Wongsangam et al. and Rollman and Spindler correlation were evaluated against the present database. In addition, the Churchill et al. model was employed in several correlation to improve their performance. It was found that none of these correlations was capable of providing a satisfactory prediction for a general operation condition. A detailed predictive ability of these correlation against specific work fluids were given for reference, and their individual parametric-trend predictive ability were also compared under varied operating conditions using several datasets.

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Ferreira, Julio, Massoud Kaviany, Vincent Dupont, Olivier de Laet, Thomas Nicolle y Erik Yen. "A Loop Heat Pipe for Vehicle CPU Cooling: Peak Performance and Partial Flooding and Dryout Regimes". En ASME 2022 Heat Transfer Summer Conference collocated with the ASME 2022 16th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/ht2022-83836.

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Abstract A Loop Heat Pipe (LHP) is assembled and tested for removing up to 400 W from two vehicle CPUs, while keeping their temperature under 95°C and using a 2 m-distanced, 45°C-air cooled condenser, and working fluid R1233zd(E). The capillary evaporator wick uses a liquid artery wick supplying liquid to a sawtooth copper wall evaporator. This novel sawtooth structure extends the evaporation area, spreads the liquid, and allows for the vapor escape space, while minimizing the evaporator resistance. For the application flexibility, it is preferred to place the condenser away from the CPUs. The air-cooled condenser fan-power consumption is also important, influencing the condenser thermal resistance. The loop thermal-hydraulics are analyzed (including the wick effective thermal conductivity, permeability, and maximum capillary pressure) and modeled. These include the role of the liquid accumulation on the evaporator, and the partial, local wick dryout under statistical variation in the microlayer wick thickness. The condenser thermal resistance and pressure drop, the transfer lines pressure drops, and the accumulator volume, which can dominate and limit the overall performance, are addressed in the design selection. The model predictions are compared with the performance of the fabricated LHP under variable thermal load and CPU-condenser separation distance. Good agreements are found, under partial flooding at low thermal load, under partial dryout at high thermal load, as well as under thermal loads with peak evaporator performance. Further improvements realized in the second-generation evaporator wick is expected to raise the peak performance and the maximum thermal load significantly.

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Robertson, Miles C., Peter J. Newton, Tao Chen y Ricardo F. Martinez-Botas. "Development and Commissioning of a Blowdown Facility for Dense Gas Vapours". En ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91609.

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Abstract The Organic Rankine Cycle is a candidate technology for low grade heat recovery, from sources as diverse as geothermal, solar and industrial/vehicle waste heat. The organic working fluids used within these systems often display significant real-gas effects, especially in proximity of the thermodynamic critical point. Significant research has therefore been performed on the design of real-gas expansion devices, including both positive displacement and rotordynamic machinery. 3D Computational Fluid Dynamics (CFD) is commonly used for performance prediction and flow field analysis within expanders, and experimental validation of these simulations within a real-gas environment are scarce within the literature. This paper therefore presents a dense-gas blowdown facility constructed at Imperial College London, for the purpose of experimentally validating numerical simulations of these fluids. The system-level design process for the blowdown rig is detailed within this paper, including the sizing and specification of major components. A hemispherically-ended 3.785 L cylinder was selected as the main blowdown vessel, allowing a designpoint pressure and temperature of 3751 kPa and 477 K, respectively. Regulating valves were placed either side of the test section, allowing a Pressure Ratio to be fixed across the measurement section. The primary design focus of this paper is that of the test section — a converging-diverging nozzle producing an expansion of Mach 2 at the nozzle exit plane. The nozzle profile is generated by Method of Characteristics (MoC) modified to account for real-gas effects. Both mechanical and fluid dynamic design are discussed, along with location and thermal management of the nine pressure transducers, located along the nozzle centreline. A series of blowdown tests are conducted, firstly for a fluid conforming closely to the ideal gas Equation of State - Nitrogen (N2) at room temperature. A comparison between the experimental measurements and a CFD analysis of these results is taken as a benchmarking example. A second set of tests with refrigerant R1233zd(E) are run, across multiple inlet pressures - CFD simulations are subsequently performed, with the refrigerant modeled by Ideal Gas, Peng-Robinson, and Helmholtz energy (via REF-PROP) Equations of State. An error analysis is conducted for each, identifying that an increase in fluid model fidelity leads to reduced deviation between simulation and experiment. An average discrepancy of 11.1% in nozzle Pressure Ratio with the Helmholtz energy EoS indicates an over-prediction of expander power output within the CFD simulation.

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Bianchi, M., L. Branchini, A. De Pascale, F. Melino, V. Orlandini, A. Peretto, D. Archetti, F. Campana, T. Ferrari y N. Rossetti. "Energy Recovery in Natural Gas Compressor Stations Taking Advantage of Organic Rankine Cycle: Preliminary Design Analysis". En ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64245.

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Gas compressor stations represent a huge potential for exhaust heat recovery. Typical installations consist of open cycle configurations with multiple gas turbine units, usually operated under part-load conditions during the year with limited conversion efficiency. At least, one of the installed unit serves as back-up to ensure the necessary reserve power and the safe operation of the station. Organic Rankine Cycle (ORC) has been proven as an economical and environmentally friendly solution to recover waste heat from gas turbines, improving the overall energy system performance and reducing the CO2 emissions. In this context, taking as reference typical gas compressor stations located in North America, the paper investigates the potential benefit of ORC application, as bottomer section of gas turbines, in natural gas compression facilities. Thus, ORC converts gas turbines wasted heat into useful additional power that can be used inside the compression facility reducing the amount of consumed natural gas and, consequently, the environmental emissions, or directed to the grid, thus furthermore earning economic benefits. Different case studies are examined with reference to two typical compressor station size ranges: a “small-medium” and a “medium-high” size range. Two different gas turbine models are considered according to most common manufacturers. Typical gas compressor stations and integrated cycle configurations are identified. Based on Turboden experience in development and production of ORCs, specific design options and constraints, layout arrangements and operating parameters are examined and compared in this study, such as the use of an intermediate heat transfer fluid, the type of organic fluid, the influence of superheating degree and condensation temperature values. Emphasis is given on thermodynamic performance of the integrated system by evaluating thermal energy and mechanical power recovery. Several key performance indexes are defined such as, the ORC power and efficiency, the specific power recovery per unit of compression power, the integrated system net overall power output and efficiency, the ORC expander and heat exchangers size parameters, the carbon emission savings, etc. The performed comparison of various configurations shows that: (i) the energy recovery with ORC can be remarkable, adding up to more than 35% of additional shaft power to the compression station in the best configuration; (ii) the ORC condensation temperature value has a significant impact on the ORC bottomer cycle and on the integrated system performance; (iii) in case of Cyclopentane, keeping the same ORC cycle operating parameters, the max specific power recovery is achieved in the direct configuration case, (iv) the bottomer cycle size can be reduced with the use of a refrigerant fluid (R1233zd(E)), compared to hydrocarbon fluids; (v) the max environmental benefit can be up to 120 kg CO2/h saved per MW of installed compression power.

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Informes sobre el tema "R1233zd(E)"

Kedzierski, Mark A. y Lingnan Lin. Pool Boiling of R515A, R1234ze(E) and R1233zd(E) on a Reentrant Cavity Surface; Extensive Measurement and Analysis. Gaithersburg, MD: National Institute of Standards and Technology, septiembre de 2019. http://dx.doi.org/10.6028/nist.tn.2063.

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