نویسنده: mohammad layeghi

دانلود کتاب اصول و کاربردهای تبدیل و مدیریت انرژی Energy Conversion and Management Principles and Applications

The book has been conceived both as a textbook for university courses in engineering
and as a work of reference for professionals in energy management. Readers are
assumed to have a basic knowledge of thermodynamics, heat and mass transfer,
electric systems and power electronics, as well as computer programming.

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دانلود کتاب تبدیل، انتقال و ذخیره انرژی تجدیدپذیر Renewable Energy Conversion, Transmission, and Storage

This book is based on the energy conversion, transmission and storage
parts of the author’s Renewable Energy, the book that in 1979 placed the topic
on the academic agenda and actually got the term “renewable energy” accepted.
While Renewable Energy (now in its third edition) deals with the
physical, technical, social, economic and environmental aspects of renewable
energy, the present book concentrates on the engineering aspects, in
order to provide a suitable textbook for the many engineering courses in renewable
energy coming on-line, and hopefully at the same time providing a
handy primer for people working in this important field.

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دانلود مقاله مبدلها (تبادلگرها)/راکتورهای حرارتی:موضوعات، فناوریها و وضعیت کنونی Heat exchanger/reactors (HEX reactors): Concepts, technologies: State-of-the-art

Process intensification is a chemical engineering field which has truly emerged in the past few years and
is currently rapidly growing. It consists in looking for safer operating conditions, lower waste in terms of
costs and energy and higher productivity; and away to reach such objectives is to develop multifunctional
devices such as heat exchanger/reactors for instance.
This review is focused on the latter and makes a point on heat exchanger/reactors.
After a brief presentation of requirements due to transposition from batch to continuous apparatuses,
heat exchangers/reactors at industrial or pilot scales and their applications are described.
Contents

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دانلود مقاله مروری بر تحقیقات درباره راههای افزایش انتقال حرارت در یک لوله حاوی نانوسیالات تحت شرط مرزی شار حرارتی ثابت Heat transfer augmentation in a tube using nanofluids under constant heat flux boundary condition: A review

In the last few decades, research on nanofluids has increased rapidly. Traditional heat transfer fluids with
order of nanometer sized particles (1–100 nm) suspended in them are termed as nanofluids. Nanofluids
have been proved as better heat transfer fluids despite of various contradictions in results by different
research groups. The aim of this article is to review and summarize the recent experimental and theoretical
studies on convective heat transfer in heat exchangers using constant heat flux boundary condition.
The use of different types of nanoparticles with different base fluids by different research groups has been
presented and compared. Further an overview of experimental results about heat transfer abilities of
hybrid nanofluids from available literature sources is also presented. Finally, the challenges and future
directions in which research can be further progress are discussed

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دانلود مقاله مرور دقیقی بر پیشرفتهای اخیر در کاربرد نانوسیالات در دستگاههای انتقال حرارت Recent advances in application of nanofluids in heat transfer devices: A critical review

در این مقاله دربارۀ کاربردهای نانوسیالات در دستگاههای انتقال حرارت صحبت شده است.
This paper presents a critical review of heat transfer applications of nanofluids. The effects of nanoparticle
concentration, size, shape, and nanofluid flow rate on Nusselt number, heat transfer coefficient, thermal conductivity,
thermal resistance, friction factor and pressure drop from numerous studies reported recently are
presented. Effects of various geometric parameters on heat transfer enhancement of system using nanofluids
have also been reviewed. Heat transfer devices covered in this paper include radiators, circular tube heat exchangers,
plate heat exchangers, shell and tube heat exchangers and heat sinks. Various correlations used for
experimental validation or developed in reviewed studies are also compiled, compared and analyzed. The pros
and cons associated to the applications of nanofluids in heat transfer devices are presented in details to determine
the future direction of research in this arena.

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