Waste heat recovery technologies and applications
Rotary Regenerators: Low – Medium: Rotary regenerators are used for low – medium temperature applications and could potentially offer a very high overall heat transfer efficiency. The system is not suitable for high temperature applications due to the structural stresses and the possibility of deformations that can be caused by high …
Design and optimization of regenerators of a rotary …
Download Citation | Design and optimization of regenerators of a rotary magnetic refrigeration device using a detailed simulation model | In this work a comprehensive simulation of a magnetic ...
REGENERATIVE HEAT EXCHANGERS
Rotary Regenerators. In the Ljungström air preheater, or rotary regenerator, the porous packing is rotated around an axis. In its …
Regenerator Designs
4.2.1 Two-Chamber and Rotary Regenerators There is a subtle but important difference between switchable regenerators of an open-hearth furnace or a Cowper hot-blast stove and a rotary regenerator. A switchable regenerator is first heated up until the core material is almost uniformly hot.
COMPACT HEAT EXCHANGERS FOR SMALL GAS TURBINES …
For a given heat transfer surface, Reynolds Number selection, and performance requirement, the necessary recuperator no-flow length also increases linearly with flow. Hence, whereas cross-flow recuperator merits serious consideration for small flow machines, rotary regenerators must be used when power requirement is above a …
Mathematical models for the simulation of thermal …
Rotary regenerators also called an air preheater, ... straightforward algebraic algorithm for the solution of classic counter flow regenerator applied in the …
Analysis of heat and mass transfer in porous sorbents used in rotary …
DOI: 10.1016/J.IJHEATMASSTRANSFER.2004.01.016 Corpus ID: 121412948; Analysis of heat and mass transfer in porous sorbents used in rotary regenerators @article{Sphaier2004AnalysisOH, title={Analysis of heat and mass transfer in porous sorbents used in rotary regenerators}, author={Leandro Alcoforado Sphaier …
Indirect Estimation of Leakage Distribution in Steam Boiler Rotary
Leakages are inherently associated with the heat transfer process in a rotary heat exchanger, owing to clearances brought about by construction difficulties and rotor-housing thermal distortions. The method proposed permits one to evaluate leakage distributions within steam boiler rotary regenerators. In principle, the method is based on a gas flow …
Effects of flow balancing on active magnetic regenerator performance
With such a system, a temperature span of 33 K has been demonstrated [6] with a machine using two regenerators, each with their own rotating magnet system. A promising concept for commercial machines is that of rotary multi-bed regenerators, where a compartmentalized regenerator is rotated relative to a magnet system.
Design of Regenerative Heat Exchangers
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 ...
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 …
Effects of flow balancing on active magnetic
With such a system, a temperature span of 33 K has been demonstrated [6] with a machine using two regenerators, each with their own rotating magnet system. A promising concept for commercial machines is that of rotary multi-bed regenerators, where a compartmentalized regenerator is rotated relative to a magnet system.
Heat Regenerators Design and Evaluation | 19 | Heat …
However, in Europe, the use of small, rotary (Ljungstrom) regenerators has been widespread for recovering heat from exhaust gases and preheating inlet air in commercial and residential oil-and coal-fired furnaces. With current consciousness about energy costs, an increased number of chemical engineers will likely be working with heat regenerators.
Mathematical models for the simulation of thermal regenerators: A …
Rotary regenerators also called an air preheater, ... straightforward algebraic algorithm for the solution of classic counter flow regenerator applied in the Stirling cycle machine has been proposed by Organ [38], [39], [40] in which design charts have been presented. His results indicated that temperature recovery ratio is inadequate …
Indirect Estimation of Leakage Distribution in Steam Boiler Rotary
adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A
A Class of Reduced-Order Regenerator Models
In Stirling and Vuilleumier machines, for example, the regenerators usually consist of a porous metal structure that is also called a matrix. It is periodically passed by alternating hot and cold flows of working gas, sometimes termed hot and cold blows. ... Extensions can be made in order to be able to describe rotary-matrix regenerators, …
Review of Design and Modeling of Regenerative …
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 …
Design of Regenerative Heat Exchangers
Abstract. Rotary regenerators are used widely for energy recovery, both in industrial and air-conditioning applications, because of the advantages they have over …
The wire mesh regenerator of the Stirling cycle machine
There are two applications of the regenerators as a heat recovery system in the processes: fixed-bed and rotary. In the fixed bed regenerators (FBRs) the bed is fixed and the hot and cold streams are periodically passed through the bed while in the rotary type the streams are fixed and the bed is rotating facing each stream.
Numerical Modeling of Regenerative Rotary Heat …
Effectiveness of plate-type heat exchangers is 45% to 65%, compared to between 60% and 80% for rotary regenerators (Heinrich and Franzke, 1993). The rotational speed of the matrix can be used to regulate the amount of the heat transferred. Thus, rotary heat exchangers are characterized by both compactness and high performance (Skiepko, 1989).
Free Full-Text | A Class of Reduced-Order Regenerator …
Nevertheless, the developed models may be modified to be applicable in describing rotary-matrix regenerators as well. In detailed models of Stirling or …
(PDF) Regenerative Heat Exchanger
In rotary regenerators, a circular honey-comb type storage mass (the matrix disc) provides axial channels through which the supply and exhaust fluids flow. 2.
A comparison of rotary regenerator theory and experimental …
The details on the experimental rotary regenerator have been presented by Skiepko [10], thus only a summary is given here. Experiments described here were …
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 of …
Sun-c Battery Regeneration Machine | manufacturer
SunC also manufactures these high voltage regenerators which can be used for battery regeneration operations. Read More BATTERY MONITORING SYSTEMS This is advanced battery monitoring system which is unique product developed by SunC. This system makes your battery electricity backup system completely automated.
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.
A comparison of rotary regenerator theory and experimental results …
DOI: 10.1016/S0894-1777(03)00048-7 Corpus ID: 119895654; A comparison of rotary regenerator theory and experimental results for an air preheater for a thermal power plant @article{Skiepko2004ACO, title={A comparison of rotary regenerator theory and experimental results for an air preheater for a thermal power plant}, author={Teodor …
Mathematical Modeling of Heat and Mass Transfer in Regenerators …
As an alternative, in rotary regenerators, a single rotating matrix allows uninterrupted operation by being continuously cycled between the two process streams. According to the given application, rotary regenerative exchangers are respectively termed enthalpy wheels—used for energy recovery—and desiccant wheels—employed in …
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.
Regenerative Heat Exchanger Theory
odic movement of the machine's piston, as illustrated by the Stirling coolers described in Chapter 1. Comparison of a Static and Rotary Regenerator The regenerator theory …