S. Stewart

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Atle Mikkola Kjøsen

Western University Canada

Jean-Christophe Plantin

London School of Economics and Political Science

Carolina Alves

University of Cambridge

David Seamon

Kansas State University

Theodore Arabatzis

National & Kapodistrian University of Athens

Armando Marques-Guedes

UNL - New University of Lisbon

Stephane Tonnelat

Centre National de la Recherche Scientifique / French National Centre for Scientific Research

Rashmi Sadana

George Mason University

Ashley Carse

Vanderbilt University

Paolo Buffo

Università degli Studi di Bergamo (University of Bergamo)

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Economical Design of Wind-Solar Hybrid Renewable Energy Systems

ASME 2009 3rd International Conference on Energy Sustainability, Volume 1, 2009

ABSTRACT Every location on Earth has its own unique set of natural resources to draw upon for sus... more ABSTRACT Every location on Earth has its own unique set of natural resources to draw upon for sustainable energy production. As these resources are generally of an intermittent nature, hybrid systems will be necessary in many situations to achieve economical energy independence while meeting our inconsistent demands for electricity with minimal or no energy storage. Wind and solar resources often have complimentary attributes that combined can more closely match energy load requirements. This match can be customized for optimum economy by adjusting the orientation and design of the PV system as well as the rotor length and generator size of the wind turbine system. Different load requirements and electricity rate structures require a different design approach in order to achieve optimum cost savings. Using the Penn State SURFRAD wind speed and solar radiation data set the design process for solar-wind hybrid renewable energy systems is explored for the case of a grid-tied residential scale application with a time of use electricity rate structure.

Design Study Comparison of Plain Finned Versus Louvered Finned-Tube Condenser Heat Exchangers

Heat Transfer: Volume 1, 2003

Enhanced fins are widely used in residential air conditioning system finned-tube condenser design... more Enhanced fins are widely used in residential air conditioning system finned-tube condenser designs. While this heat transfer augmentation technique increases the heat transfer coefficient in the heat exchanger, it also increases the air side frictional pressure drop. These two effects compete with each other, making it difficult to determine the relative goodness between plain fin versus enhanced fin designs with realistic constraints. In the past, this design tradeoff has been largely determined by experimental trial and error or heuristic figures of merit. No studies are available showing the effect of fin augmentation on overall system performance under consistent cost and frontal area constraints. The residential air conditioning system model calculates all component and system performance parameters. The condenser design requires the specification of approximately ten design parameters. A search method is used to vary these ten parameters and reach an optimum design based on a ...

S. Stewart

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