Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Carnot Cycle01:30

The Carnot Cycle

Converting work to heat is an irreversible process, and the purpose of a heat engine is to reverse the effect partially. Heat engines aim to increase the efficiency of the reversal, that is, maximize the work retrieved from heat. If the efficiency of a heat engine were 100%, it would imply reversing the process completely without introducing any other effect. Thus, it would violate the second law of thermodynamics.
What could be the theoretical limit to the efficiency of a heat engine? The...
Heat Engines01:10

Heat Engines

A heat engine is a device used to extract heat from a source and then convert it into mechanical work used for various applications. For example, a steam engine on an old-style train can produce the work needed for driving the train.
Whenever we consider heat engines (and associated devices such as refrigerators and heat pumps), we do not use the standard sign convention for heat and work. For convenience, we assume that the symbols Qh, Qc, and W represent only the amounts of heat transferred...
Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Case of Upper Limb Compartment Syndrome following Snake Envenomation: Measure Twice, Cut Once.

The West Indian medical journal·2014
Same author

A single proposed algorithm for the surgical treatment of hepatic hemorrhage.

Minerva chirurgica·2006
Same author

[Recent advances in rehabilitation technology: a review of the brain-computer interface].

Revista de neurologia·2004
Same author

Plasma concentrations after three different doses of topical isotretinoin.

Skin pharmacology : the official journal of the Skin Pharmacology Society·1994
Same author

[Amebiasis: clinical, diagnostic & therapeutic aspects].

Revista brasileira de gastroenterologia·1958
Same author

[Psychotherapy in gastroenterology].

Revista brasileira de gastroenterologia·1958

Related Experiment Video

Updated: Jun 23, 2026

Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts
11:06

Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts

Published on: August 8, 2016

Exergy optimization in a steady moving bed heat exchanger.

A Soria-Verdugo1, J A Almendros-Ibáñez, U Ruiz-Rivas

  • 1Carlos III University of Madrid, Thermal and Fluids Engineering Department, ISE Research Group, Madrid, Spain. asoria@ing.uc3m.es

Annals of the New York Academy of Sciences
|May 12, 2009
PubMed
Summary

This study optimizes moving bed heat exchanger (MBHE) dimensions and particle size for energy and exergy efficiency. Optimal length depends on flow rate, with exergy-optimal dimensions slightly smaller than thermal-optimal ones.

More Related Videos

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
06:43

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

Published on: November 21, 2017

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Related Experiment Videos

Last Updated: Jun 23, 2026

Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts
11:06

Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts

Published on: August 8, 2016

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
06:43

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

Published on: November 21, 2017

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Area of Science:

  • Thermodynamics
  • Heat Transfer
  • Chemical Engineering

Background:

  • Moving bed heat exchangers (MBHEs) are crucial for thermal processes.
  • Optimization of MBHEs is essential for energy efficiency and reduced operational costs.
  • Understanding the interplay between dimensions, particle size, and flow rate is key.

Purpose of the Study:

  • To perform an energy and exergy optimization analysis of a cross-flow MBHE.
  • To determine optimal MBHE dimensions and particle diameter for various flow rates.
  • To compare numerical and analytical solutions for MBHE performance.

Main Methods:

  • Numerical simulation of steady-state heat transfer in MBHE.
  • Analytical solution of simplified heat transfer equations (neglecting conduction).
  • Derivation of exergy destruction expression from analytical solution.

Main Results:

  • Optimal MBHE length is primarily dependent on fluid flow rate.
  • Particle diameter significantly impacts performance only when very small, increasing pressure drop.
  • Exergy-optimal MBHE length is consistently, though slightly, smaller than the thermal-optimal length.

Conclusions:

  • MBHE optimization requires balancing energy and exergy considerations.
  • Flow rate is the dominant factor in determining optimal MBHE length.
  • Particle size is a secondary optimization parameter, with implications for pressure drop.