Heat Exchangers, 1. Fundamentals and General Design Methodology

2015 ◽  
pp. 1-39
Author(s):  
Ramesh K. Shah ◽  
Alfred C. Mueller ◽  
Dusan P. Sekulic
Keyword(s):  
Heat Exchangers ◽  
Design Methodology ◽  
General Design

scholarly journals DAILY PRACTICES AND PROCESSES OF TERRITORIALIZATION OF SETTLERS IN QUERÊNCIA DO NORTE, PARANÁ, BRAZIL

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
ELINE G. O. ZIOLI ◽  
FÁBIO S. RODRIGUES ◽  
EVANDRO L. GAFFURI ◽  
ELISA Y. ICHIKAWA
Keyword(s):  
Life History ◽  
Sense Of Belonging ◽  
Design Methodology ◽  
Daily Life ◽  
The State ◽  
Work Study ◽  
General Design ◽  
Work Routine ◽  
The Right ◽  
Analysis Of Narratives

ABSTRACT Purpose: To understand the processes of territorialization in the daily life and work routine of settlers in Querência do Norte, Paraná, Brazil. Originality/value: This work contributes to the context of discussions on territory and territorialization processes (Haesbaert, 2011; Raffestin, 1993, 2008; Saquet, 2008) in the daily life (De Certeau, 2014) of workers marginalized by society in general. Design/methodology/approach: We developed this qualitative article from data collected through eight life history interviews with settlers, pre-settlers, and residents of Querência do Norte, in the State of Paraná (PR). After transcribing the interviews, they went through an analysis of narratives. Findings: We identify that, through the practices of work, study and claims, the settlers territorialize the space, and there they create their own rules and norms of coexistence. In their struggles for land, it is clear that their place of belonging is the field, justifying the insistence on the struggle for the right to land to cultivate. The sense of belonging of the workers is represented by the struggle that unites them and places them as part of a larger movement. Placing men at the center of the construction of territoriality is accomplished through the daily struggle and work of the settlers and pre-settlers in Querência do Norte (PR).

A Review on Memristive Stateful Logic

2013 ◽  
Vol 791-793 ◽  
pp. 1845-1849
Author(s):  
Xu Dong Fang ◽  
Yu Hua Tang ◽  
Jun Jie Wu
Keyword(s):  
Computer Architecture ◽  
Design Methodology ◽  
Logic Gates ◽  
Working Mechanism ◽  
General Design ◽  
Computing Paradigm ◽  
Pros And Cons ◽  
Logic Operations ◽  
Conventional Computer

With the realization of physical memristors, using memristors to perform stateful logic operations has been demonstrated feasible. In such operations, memristors simultaneously serve as latches and logic gates, thus enabling the in-situ computing which may open a new computing paradigm for computer architecture. In this paper, we first analyze two types of typical memristive stateful logic gates to reveal the working mechanism of the stateful logic, and then review the recent researches on the memristive stateful logic, and finally discuss the pros and cons of the stateful logic. We reach the conclusion that the stateful logic promises a novel computing paradigm which may revolutionize the conventional computer architecture, while its development is currently subjected to the state drift problem and is constrained by the lack of a general design methodology and physically verification.

Earth-Air and Earth-Water Heat Exchanger Design for Ventilation Systems in Buildings

2010 ◽  
Author(s):  
Michel De Paepe ◽  
Christophe T’Joen ◽  
Arnold Janssens ◽  
Marijke Steeman
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
Design Methodology ◽  
Energy Use ◽  
Polyethylene Tube ◽  
Dynamic Simulations ◽  
Tube Heat Exchanger ◽  
Heat Exchanger Design ◽  
The Earth ◽  
Software Codes

Earth-air heat exchangers are often used for (pre)heating or (pre)cooling of ventilation air in low energy or passive house standard buildings. Several studies have been published in the passed about the performance of these earth-air heat exchangers [1–8]. Often this is done in relation to the building energy use. Several software codes are available with which the behaviour of the earth-air heat exchanger can be simulated. De Paepe and Janssens published a simplified design methodology for earth-air heat exchangers, based on thermal to hydraulic performance optimisation [7]. Through dynamic simulations and measurements it was shown that the methodology is quite conservative [9–10]. Hollmu¨ller added an earth-air heat exchanger model to TRNSYS [11]. In stead of using earth-air heat exchangers, earth-water heat exchangers are now getting more attention. In this system the ventilation air is indirectly cooled/heated with the water flow in a fin-tube heat exchanger in the inlet of the ventilation channel. The water-glycol mixture transfers heat with the earth by flowing through e.g. a polyethylene tube. In the second part of this paper a design methodology is first derived and then applied to this type of system.

Teaching Creative Design by Integrating General Design Theory and the Pahl and Beitz Methodology

2010 ◽  
Author(s):  
Tetsuo Tomiyama ◽  
Paul Breedveld ◽  
Herbert Birkhofer
Keyword(s):  
The Netherlands ◽  
Medical Devices ◽  
Design Education ◽  
Design Theory ◽  
Design Methodology ◽  
Theoretical Explanation ◽  
Creative Design ◽  
General Design ◽  
Improve Design ◽  
Design Methodologies

The design methodology developed by Pahl and Beitz (P&B) is one of the most widely taught design methodologies. However, this methodology is not easy to correctly exercise for non-experienced designers such as students. At TU Darmstadt in Germany, a method was developed to make students to realize the background philosophy of P&B, to reduce misunderstanding and misuse of the method, and to help them to arrive at creative design. At TU Delft in the Netherlands, an experienced designer who works on designing mechanical medical devices developed a method to generate creative designs. Although independently developed, these two methods share some commonality and have a potential to improve design education towards creative design. This paper is an attempt to give a theoretical explanation why these two methods facilitate creative design based on General Design Theory.

A Testing and HVAC Design Methodology for Air-to-Air Heat Pipe Heat Exchangers

1998 ◽  
Vol 4 (1) ◽  
pp. 3-26 ◽  
Author(s):  
Pingbo Guo ◽  
Dustin Ciepliski ◽  
Robert Besant
Keyword(s):  
Heat Pipe ◽  
Heat Exchangers ◽  
Design Methodology ◽  
Pipe Heat

A general design methodology for the optimal multiple-field-limiting-ring structure using device simulator

2003 ◽  
Vol 50 (11) ◽  
pp. 2273-2279 ◽  
Author(s):  
Xu Cheng ◽  
J.K.O. Sin ◽  
J. Shen ◽  
Yong-jin Huai ◽  
Rui-zhen Li ◽  
...  
Keyword(s):  
Design Methodology ◽  
Ring Structure ◽  
General Design ◽  
Multiple Field

A Mathematical Based Design Methodology for Crossflow Heat Exchangers

2009 ◽  
Author(s):  
Antonio Dumas ◽  
Michele Trancossi
Keyword(s):  
Heat Exchangers ◽  
Design Methodology ◽  
Cross Flow ◽  
Heat Pipes ◽  
Theoretical Work ◽  
Geometrical Parameters ◽  
Effective Evaluation ◽  
Accurate Design ◽  
Flow Heat ◽  
Parameters Analysis

This paper presents a theoretical work, in order to apply well tested experimental correlations by Gnielinski to a lumped parameters analysis of cross-flow heat exchanger. It produces an effective set of equations which could be useful and effective in order to produce an accurate design of staggered and in line heat exchangers, but also heat pipes based exchangers. The presented method can help designer of heat exchangers to design and determinate performances of cross flow heat exchangers starting by the physical properties of a pipe (or heat pipe) and using geometrical parameters of the exchanger produces an effective evaluation of performances of the whole exchanger.

Adaptive Robotic Mechanical Systems: A Design Paradigm

2005 ◽  
Vol 128 (1) ◽  
pp. 192-198 ◽  
Author(s):  
Clément M. Gosselin
Keyword(s):  
Mechanical System ◽  
General Framework ◽  
Design Methodology ◽  
Mechanical Systems ◽  
General Design ◽  
Design Paradigm ◽  
Robotic Devices ◽  
Associated Design

This paper aims at developing a general framework for the use of the concept of adaptive mechanical system in the design of advanced robotic devices. The concept of adaptive mechanical system is first formalized. A design methodology is then proposed in order to formulate the associated design paradigm, based on the fundamental principles of mechanics. Finally, examples of adaptive robotic mechanical systems taken from the literature are presented in order to illustrate the application of the general design methodology.

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