Rotary regenerator: Constructal thermoeconomic optimization
In this research, rotary regenerator (RR) is optimized using constructal theory. For this aim, a heat exchanger with two branches is considered. RR effectiveness and total annual cost (TAC) are deliberated as objective functions and 9 design variables are selected. The multi-objective optimization algorithm is used to obtain the optimal …
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Design and optimization of regenerators of a rotary …
Compared to epoxy-bonded regenerators, non-bonded regenerators exhibit a larger temperature span (10.2 K at no load) and specific cooling power (27% improvement at a span of 4K).
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Experimental comparison of multi-layered La–Fe–Co
Experimental comparison of multi-layered La–Fe–Co–Si and single-layered Gd active magnetic regenerators for use in a room-temperature ... state the material has very enhanced mechanical properties and is easier to machine. Then, after the material has been machined in the decomposed state, it is recombined back into the …
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Indirect estimation of leakage distribution in steam boiler rotary …
The method proposed permits one to evaluate leakage distributions within steam boiler rotary regenerators. In principle, the method is based on a gas flow diagram of the regenerator, where gas streams are arranged into a network in which the corresponding mass flow rates are governed by pressure drops in the seals and matrix …
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Numerical Modeling of Regenerative Rotary Heat Exchanger …
Rotary regenerators are used widely for energy recovery, both in industrial and air-conditioning applications, because of the advantages they have over other types of heat exchangers.
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New regenerator for gas turbines
Another substantial advantage over rotary regenerators (either of the steady-flow or discontinuous-flow types) is that none of the matrix surfaces is taken by seals, which can cover large proportions of the matrix surfaces. For more information contact Dave Wilson at . [email protected], or Jim Kesseli at . …
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What is Regenerator (or Regenerative Heat
Advantages of Regenerators. Maximum heat transfer. Minimum pressure loop. High efficiency. Less weight per kW of plant. Disadvantages of Regenerators. Costly; Leakage creates problems. Applications of Regenerators. I.C. Engines. Gas Turbines. Open hearth and glass melting furnaces. Air heaters of blast furnaces.
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(PDF) Design of Regenerative Heat Exchangers
Rotary regenerative heat exchangers or rotary regenerators are used for various heat recovery applications in order to fulfill the energy requirements. Rotary air preheater is a rotary ...
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Stirling cycle refrigerator or engine employing the rotary …
The improved Stirling machine of the present invention is best understood conceptually with reference to FIGS. 3A-3D in which the machine 30 is shown to comprise an expansion side Wankel mechanism 31 and a compression side Wankel mechanism 32 interconnected through first and second stationary regenerators, 33 and 34, respectively.
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The study on heat transfer model of tri-sectional rotary air preheater
Rotary air preheaters, especially tri-sectional air preheaters have been proved to have a considerable influence on the performance of the entire steam boiler. Tri-sectional thermal regenerators are commonly operated in counter-flow mode as shown in Fig. 1. It mainly consists of a heating matrix of solid material and the hot gas passes through ...
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Analysis of heat and mass transfer in porous sorbents used in rotary …
Fig. 1(a) illustrates a typical rotary regenerative exchanger. The rotary matrix revolves at a constant velocity ω, being cyclically exposed to two physically separated air streams, which can be either in counterflow or co-current arrangement.These streams, labeled inlet-stream I and inlet-stream II, are fed to the regenerator through two ducts, …
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A computational fluid dynamics model of a rotary …
Heat transfer and pressure drop through 13 popular flow passages of power plant's rotary regenerators were obtained by CFD simulations. The outcomes were used in a mathematical model of the rotary ...
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Analysis of the gas turbine rotary regenerator
Recent solution of the 'Hausen' regenerator and conjugate heat transfer problems invites a fresh look at the Ritz rotary regenerator. The approach deals readily …
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Design and optimization of regenerators of a rotary …
It has a rather complicated, rotary magnet assembly design with 0.0073 m 3 magnet and high figure of merit of Λ cool = 0.2 T ⅔ and 24 stationary regenerators delivering 100 W cooling capacity over 20.5 K temperature span with 2.8 kg gadolinium as refrigerant. Among the reciprocating designs the prototype presented by Balli et al. …
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COMPACT HEAT EXCHANGERS FOR SMALL GAS …
Two types of the more promising heat exchangers, the contra-flow rotary regenerator and the cross-flow recuperator, have been discussed in detail, and equations developed by …
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Rotary Regenerators for the Whirlfire Vehicular Turbines
The major considerations in the selection, design and development of a rotary regenerator for a vehicular gas turbine are discussed. The performance results, such as effectiveness, pressure loss and leakage of the regenerator in the General Motors Research GT-305 gas-turbine engine are presented in detail. A method for evaluating …
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Numerical analysis of the performance characteristics and …
1. Introduction. A rotary regenerator has been widely used in power plants, industrial processes, and furnaces to recover heat energy from high temperature exhaust air [1], [2], [3] because of effective gas to gas heat transfer with a large heat transfer area per volume. A rotary regenerator has reduced maintenance cost due to the characteristic …
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Effectiveness of Rotary Air Preheater in a Thermal Power …
Rotary air preheater is the main equipment used to recover. waste heat from the exhaust flue gases in thermal po wer plants. By preheati ng the combustion air with the hot flue gases. leaving out ...
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A Class of Reduced-Order Regenerator Models
Nevertheless, the developed models may be modified to be applicable in describing rotary-matrix regenerators as well. In detailed models of Stirling or Vuilleumier machines, the various working spaces of the machines are resolved both spatially and temporally. That is, inside the working spaces, gas temperatures and pressures vary (at …
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Analysis of heat and mass transfer in rotary regenerators
Rotating regenerators or heat wheels and plate heat exchanger are the generally used gas-gas heat exchanger [114]. Gas-liquid heat exchanger is also commonly used heat exchanger in the steam ...
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How a rotary regenerative heat exchanger works? | Remak.eu
Rotary regenerative heat exchangers are used for heat recovery, and are designed to transfer heat (non-hygroscopic version), or to transfer humidity (hygroscopic version) …
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Rotary Regenerator
Rotary regenerator technology consists of two isolated flow streams, one containing hot exhaust gases and the other containing a cooler stream. The technology operates in a …
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Design of Regenerative Heat Exchangers | Semantic Scholar
Rotary regenerators are used widely for energy recovery, both in industrial and air-conditioning applications, because of the advantages they have over other types of heat exchangers. In this study, a mathematical model for the design of rotary regenerators is presented. The method is valid for all kinds of channel geometries that form the matrix …
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Novel rotary regenerative heat exchanger using cascaded …
In various applications, the regenerators are commonly in rotary type, which are referred to as thermal wheel, heat wheel [4], rotary air preheater (RAPH) [5], [6], rotary gas-to-gas heater or Ljungstrom wheel [3]. With the rotor rotating through the hot and cold fluids in sequence, the continuous heat transfer from hot fluid to cold fluid is ...
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Energies | Free Full-Text | Review of Design and Modeling of …
Regenerators can be divided into two categories: fixed-bed and rotary regenerators. In the fixed-bed regenerator, a single fluid stream has cyclical or reversible flow. Valves are employed to switch the flow the hot and cold gas streams. In the rotary regenerator, the storage material rotates continuously through two counterflowing …
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Coke Ovens
• regenerators clean out • high pressure grouting: battery top, gas guns, gas risors, door frames • end flue panel patch • end flue replacement • charge hole casting re-set/replacement • flue casting re-set/re placement • wharf repair application equipment door spray buggy rotary dry gunite machine pressurized dry gunite machine
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Indirect Estimation of Leakage Distribution in Steam Boiler Rotary …
The method proposed permits one to evaluate leakage distributions within steam boiler rotary regenerators. In principle, the method is based on a gas flow diagram of the regenerator, where gas streams are arranged into a network in which the corresponding mass flow rates are governed by pressure drops in the seals and matrix …
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Waste Heat Recovery Technologies and Applications
Rotary regenerators are used for low – medium tem- perature applications and could potentially o ff er a very high overall heat transfer e ffi ciency [38] (see Fig. 8 ).
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ROTARY REGENERATORS
A-to-Z Guide to Thermodynamics, Heat & Mass Transfer, and Fluids Engineering. Localization Dropdown menu English . Русский; ; ; Português; Español
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The utilization of recuperated and regenerated engine
The negative characteristics of regenerators are: the seal and matrix `carryover' leakage, which together can reach high levels-e.g. 15% of the compressor mass flow, a substantial penalty; the high wear and poor reliability record of many rotary regenerators; and the impracticability hitherto of being able to manufacture …
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