دانلود مقاله روشهای افزایش انتقال حرارت و فاکتور عملکرد آنها The heat transfer enhancement techniques and their thermal performance factor
در این مقاله روشهای افزایش انتقال حرارت تشریح شده است.
دانلود مقاله مبدلهای حرارتی (تبادلگرهای گرمای) جدید از نوع فوم فلزی سبک Novel Lightweight Metal Foam Heat Exchangers
در این مقاله دربارۀ تبادلگرهای گرما از نوع فوم فلزی و سبک وزن صحبت شده است. مطالعه آن برای دانشجویان کارشناسی ارشد و دکترا اکیدا توصیه می شود.
دانلود مقاله روشهای اندازه گیری ضریب هدایت حرارتی و ضریب هدایت حرارتی فصل مشترک مواد توده ای و لایه نازک Measurement Techniques for Thermal Conductivity and Interfacial Thermal Conductance of Bulk and Thin Film Materials
در این مقاله 64 صفحه ای روشهای اندازه گیری ضریب هدایت حرارتی مواد مختلف توضیح داده شده است.
دانلود مقاله مبدلهای حرارتی (تبادلگرهای گرما) از نوع لوله های گرمایی:طراحی، فناوری و کاربردها The Heat Pipe Heat Exchangers: Design, Technology and Applications
In this paper the Heat Pipe Heat Exchanger (HPHE) is presented as a new and very attractive
Heat Exchanger type. In the first part of the paper a presentation of the modelization of the
HPHE is given, in the second part some technologocal considerations are developped and in
the third part two exemples of industrial applications are described.
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
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
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.
دانلود مقاله مروری بر انتقال حرارت و جرم افزایش یافته در استخرهای خورشیدی با استفاده از نانوسیالاتEnhanced heat and mass transfer in solar stills using nanofluids: A review
در این مقاله دربارۀ افزایش انتقال جرم و حرارت در استخرهای خورشیدی (solar stills)با استفاده از نانوسیال صحبت شده است. مرور تحقیقات قبلی به خوبی در این مقاله انجام گرفته است.
دانلود مقاله مروری بر هیدرودینامیک و کارایی شناگری دلفین Review of Dolphin Hydrodynamics and Swimming Performance
everything about dolphins hydrodynamics
دانلود مقاله تطبیق تولید انرژی غیر متمرکز و مصرف محلی: مروری بر سیستمهای انرژی تجدید پذیر با فناوریهای تبدیل و ذخیره Matching decentralized energy production and local consumption: A review of renewable energy systems with conversion and storage technologies
The increasing share of decentralized intermittent renewable energy reinforces the
necessity of balancing local production and consumption. Decentralized energy
systems, powered by renewable energy technologies and incorporating storage and
conversion technologies, are promising options to cope with this challenge. Many
studies have evaluated their potential contributions, but an overview of the statusquo
in both academia and practice is missing. The extant literature lacks a comprehensive
review of the scientific knowledge on decentralized energy systems,
partially attributed to the lack of common terminology. Additionally, it remains
unclear what kind of systems are already implemented today worldwide as they
have not yet been thoroughly analyzed and described. However, pilot projects provide
valuable insights into future applications and operational aspects. To fill these
gaps, an extensive review of the current state of literature and practice is conducted.
To do so, 64 publications and 56 projects were analyzed and an overview is provided
using four criteria: terminology, scope/motivation, application, and technical
configuration. These criteria facilitate the understanding of decentralized energy
systems needed to spur their development and diffusion. Further advancements of
research and practice are discussed. For example, technological learning hinges on
a common terminology and on an identification of optimal technical configurations
per application. There are both avenues for future research.
This article is categorized under:
Energy Systems Analysis > Economics and Policy
Energy Infrastructure > Systems and Infrastructure
Energy and Urban Design > Systems and Infrastructure
Energy Research & Innovation > Systems and Infrastructure