scholarly journals Basic Design Methods of Heat Exchanger

10.5772/67888 ◽  
2017 ◽  
Author(s):  
Cüneyt Ezgi
Keyword(s):  
Heat Exchanger ◽  
Design Methods ◽  
Basic Design

Design of Cooling Towers by the Effectiveness-NTU Method

1989 ◽  
Vol 111 (4) ◽  
pp. 837-843 ◽  
Author(s):  
H. Jaber ◽  
R. L. Webb
Keyword(s):  
Heat Exchanger ◽  
Cooling Tower ◽  
Design Method ◽  
Design Methods ◽  
Parallel Flow ◽  
Basic Method ◽  
Cooling Towers ◽  
Flow Configuration ◽  
Heat Exchanger Design

This paper develops the effectiveness-NTU design method for cooling towers. The definitions for effectiveness and NTU are totally consistent with the fundamental definitions used in heat exchanger design. Sample calculations are presented for counter and crossflow cooling towers. Using the proper definitions, a person competent in heat exchanger design can easily use the same basic method to design a cooling tower of counter, cross, or parallel flow configuration. The problems associated with the curvature of the saturated air enthalpy line are also treated. A “one-increment” design ignores the effect of this curvature. Increased precision can be obtained by dividing the cooling range into two or more increments. The standard effectiveness-NTU method is then used for each of the increments. Calculations are presented to define the error associated with different numbers of increments. This defines the number of increments required to attain a desired degree of precision. The authors also summarize the LMED method introduced by Berman, and show that this is totally consistent with the effectiveness-NTU method. Hence, using proper and consistent terms, heat exchanger designers are shown how to use either the standard LMED or effectiveness-NTU design methods to design cooling towers.

Conventional heat exchanger design methods and their applicability to thermoacoustics

1999 ◽  
Vol 105 (2) ◽  
pp. 1012-1012 ◽  
Author(s):  
Cila Herman
Keyword(s):  
Heat Exchanger ◽  
Design Methods ◽  
Heat Exchanger Design

scholarly journals Basic design of a cooling system for nylon 6, 6 process

2018 ◽  
Vol 7 (3) ◽  
pp. 977
Author(s):  
Karthik Silaipillayarputhur Ph. D ◽  
Nasser Al Mulhim ◽  
Abdullah Al Mulhim ◽  
Mohammed Arfaj ◽  
Ahmed Al Naim
Keyword(s):  
Heat Exchanger ◽  
Rate Ratio ◽  
Cooling System ◽  
Ambient Air ◽  
Nylon 6 ◽  
Polymer Fibers ◽  
Basic Design ◽  
Quenching Process ◽  
Pre Treatment ◽  
Selection Of

The project concentrates on the basic design of a cooling system for rapidly cooling nylon 6, 6 polymer fibers using cold air. The ambient air after pre-treatment in the air-washer is available at 72°F all year round. Based on the company’s throughput, it is required to supply (quench) air at 58°F. Nylon 6, 6 polymer after thorough polymerization is distributed through 16 quench cabinets and each quench cabinet requires approximately 530 ft3/min (cubic feet per minute, CFM) of air. The project concentrates on the basic design of a cooling system wherein air at the required mass flow rate is supplied at 58°F for the quenching process. A basic design of the refrigeration cycle and heat exchangers were considered in this work. In the development of the basic design for heat exchanger, performance charts were developed. Performance charts describe the performance of the heat exchanger in terms of fundamental dimensionless parameters. Using performance charts it was clearly seen that increasing the number of transfer units (NTU) doesn’t necessarily increase the rate of heat transfer. Increasing the NTU beyond an optimum value is pointless and increases the capital cost of the heat exchanger. The preliminary design involves selection of appropriate NTU and capacity rate ratio for the heat exchanger. From the capacity rate ratio and NTU, it is fairly straight forward to extrapolate the detailed design for the heat exchanger. A cooling system model was developed for the design process and for the simulation of the cooling system.  

Design Methods of Pine Furniture

2012 ◽  
Vol 591-593 ◽  
pp. 34-39
Author(s):  
Li Hua Tang ◽  
Wen Jin Liu
Keyword(s):  
Material Properties ◽  
Design Method ◽  
Basic Structure ◽  
Fundamental Principle ◽  
Design Methods ◽  
Basic Material ◽  
Basic Design ◽  
Furniture Design ◽  
Design And Manufacturing ◽  
Shape Characteristics

Pine furniture is becoming increasingly popular among customers. With the aim of improving pine furniture design and manufacturing, this paper analyzes the basic material properties of pine, such as the color, the texture, the shape and the structure of its parts. The technical design methods for the framework, panel, and shelf structures are also discussed. The fundamental principle on the style and design method of pine furniture is summarized. The results show that the influence of the knots and flaws, the turpentine and moisture content, the paint decoration and colors, the textures and veins, the shape characteristics of furniture parts, the basic structure forms of furniture units, and the connection methods significantly great affects pine furniture design. According to the basic design principles and methods, designers can obtain fine pine furniture.

Basic Design Methods of Heat Exchangers

2012 ◽  
pp. 49-96
Keyword(s):  
Heat Exchangers ◽  
Design Methods ◽  
Basic Design

Basic Design Methods of Heat Exchangers

2020 ◽  
pp. 29-68
Author(s):  
Sadık Kakaç ◽  
Hongtan Liu ◽  
Anchasa Pramuanjaroenkij
Keyword(s):  
Heat Exchangers ◽  
Design Methods ◽  
Basic Design

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Developing design literacy through brand-based artefacts

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Catarina LELIS
Keyword(s):  
Empirical Study ◽  
Focus Groups ◽  
Design Process ◽  
Basic Design ◽  
Willingness To Participate ◽  
Socially Responsible ◽  
Interaction Structure ◽  
Functional Prototype ◽  
High Willingness

The brand is a powerful representational and identification-led asset that can be used to engage staff in creative, sustainable and developmental activities. Being a brand the result of, foremost, a design exercise, it is fair to suppose that it can be a relevant resource for the advancement of design literacy within organisational contexts. The main objective of this paper was to test and validate an interaction structure for an informed co-design process on visual brand artefacts. To carry on the empirical study, a university was chosen as case study as these contexts are generally rich in employee diversity. A non-functional prototype was designed, and walkthroughs were performed in five focus groups held with staff. The latter evidenced a need/wish to engage with basic design principles and high willingness to participate in the creation of brand design artefacts, mostly with the purposeof increasing its consistent use and innovate in its representation possibilities, whilst augmenting the brand’s socially responsible values.

Section 4.a Introduction

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Silvia PIZZOCARO ◽  
Pınar KAYGAN ◽  
HARMAN Kerry ◽  
Erik BOHEMIA
Keyword(s):  
Social Problems ◽  
Elderly Care ◽  
Child Poverty ◽  
Design Methods ◽  
Innovative Solutions ◽  
Design Council

Co-design is a process in which designers and users collaborate as ‘equals’ to develop innovative solutions. Co-design methods are increasingly used by professional designers to facilitate and enable users to co-develop innovative solutions for ‘themselves’. For example, the Design Council is advocating the use of co-design methods to support the development of practical innovative solutions to social problems such as increased cost of elderly care and tackling child poverty. The involvement of users in developing solutions acknowledges that their take up is dependent on the ways users create and negotiate meanings of objects and services.

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