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1 – 10 of over 2000
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Article
Publication date: 1 December 2003

K. Narasimhan

2681

Abstract

Details

The TQM Magazine, vol. 15 no. 6
Type: Research Article
ISSN: 0954-478X

Keywords

Article
Publication date: 6 June 2016

Jan Stentoft, Ram Narasimhan and Thomas Poulsen

To support ongoing industry efforts to reduce the cost of energy (CoE) of offshore wind compared to other types of energy sources, researchers are applying scientific models and…

2053

Abstract

Purpose

To support ongoing industry efforts to reduce the cost of energy (CoE) of offshore wind compared to other types of energy sources, researchers are applying scientific models and thought processes to identify potential areas of improvement and optimization. This paper aims to introduce a conceptual framework from a supply chain management (SCM) perspective, aimed at promoting the reduction of CoE in the offshore wind energy industry.

Design/methodology/approach

Using conceptual arguments from current academic literature in SCM, a comprehensive framework is presented that clarifies how SCM practices can be used by offshore wind energy industry to reduce CoE.

Findings

The offshore wind energy sector is a young industry that must reduce CoE to compete with other forms of energy. Applying a supply chain perspective in the offshore wind industry has hitherto been limited to the academic community. This paper offers a SCM framework that includes three interdependent aspects of reducing CoE – innovation, industrialization and supplier partnering – to guide the industry towards sources to reduce CoE.

Research limitations/implications

SCM is a broad research area; thus, the presented framework to reduce the CoE is open for further development.

Practical implications

The paper provides insights into how the CoE can be reduced through innovation, industrialization and partnering in the offshore wind energy supply chain.

Originality/value

The paper offers a seminal contribution by introducing a SCM framework to understand sources and approaches to reduce CoE in the offshore wind energy industry.

Details

International Journal of Energy Sector Management, vol. 10 no. 2
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 29 August 2019

Behnam Rajabzadeh, Mohammad Hojaji and Arash Karimipour

Porous medium has always been introduced as an environment for increasing heat transfer in cooling systems. However, increase in heat transfer and resolving pressure drop in the…

Abstract

Purpose

Porous medium has always been introduced as an environment for increasing heat transfer in cooling systems. However, increase in heat transfer and resolving pressure drop in the fluid flow have been focused on by researchers.The purpose of this paper is to study the effects of creating porous micro-channels inside porous macro-blocks to optimize system performance in channels.

Design/methodology/approach

To simulate flow field, a developed numerical code that solves Navier–Stokes equations by finite volume method and semi-implicit method for pressure linked equations (SIMPLE) algorithm will be used together with bi-disperse porous medium (BDPM) method. Working fluid is air with Pr = 0.7 in laminar state. Influence of permeability changes by creation of micro-channels containing porous medium in vertical, horizontal and cross-shape patterns will be investigated.

Findings

By creating porous micro-channels inside macro-blocks, not only does the heat transfer increase significantly but the pressure also drops remarkably. Increase in performance evaluation criteria (PEC) is more evident in lower Reynolds numbers that can increase the PEC to 75 per cent by creating cross-shape micro-channels. By changing the permeability of micro-channels, PEC will increase by reducing the pressure drop but it has minor changes in Nu.

Research limitations/implications

The current work is applicable to optimizing system performance by decreasing the pressure drop and increasing the heat transfer.

Practical implications

The developed patterns are useful in increasing the system performance including the increase in heat transfer and decrease in pressure drop in systems such as air coolers required in electrical circuits.

Originality/value

Development and optimization of system performance by new patterns using BDPM in comparison to the previous patterns.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 11
Type: Research Article
ISSN: 0961-5539

Keywords

Content available
Article
Publication date: 1 September 2004

K. Narasimhan

534

Abstract

Details

Measuring Business Excellence, vol. 8 no. 3
Type: Research Article
ISSN: 1368-3047

Abstract

Details

Recent Developments in Transport Modelling
Type: Book
ISBN: 978-0-08-045119-0

Article
Publication date: 2 January 2018

Keyur D. Vaghela, Bhavesh N. Chaudhary, Bhavbhuti Manojbhai Mehta, V.B. Darji and K.D. Aparnathi

There are various Kreis tests reported in the literature with wide variations in the procedure. The purpose of this paper is to select the most suitable and reliable method for…

Abstract

Purpose

There are various Kreis tests reported in the literature with wide variations in the procedure. The purpose of this paper is to select the most suitable and reliable method for the rancidity evaluation in ghee.

Design/methodology/approach

Ghee samples were prepared from butter by the direct cream method. They were assessed for early-stage oxidative deterioration by four Kreis tests in an accelerated storage trial at intervals of 48 h. The amount of ghee samples, amount of reagents (chloroform, 30 percent trichloroacetic acid, 1 percent phloroglucinol, and ethanol), incubation temperature and duration were different in the four tests. For each method, the ghee samples were also monitored for changes in flavor at intervals of 48 h by sensory evaluation. Relationships among the Kreis values determined by the four different Kreis tests and flavor scores were established using a correlation analysis.

Findings

The correlation coefficient of the Kreis values determined by different Kreis tests was in decreasing order of: Kreis test-2 (−0.904) > Kreis test-4 (−0.792) > Kreis test-3 (−0.648) > Kreis test-1 (−0.469). Thus, among the four different Kreis tests, Kreis Test-2 reported by Pool and Prater (1945) was found to be more sensitive and more consistent, and have the highest coefficient of correlation (−0.904) with flavor score of ghee during storage at 80±2°C.

Practical implications

The finding of this study will be useful for the selection of an appropriate and reliable Kreis test that can be used for detecting rancidity in ghee at an incipient stage. The development of rancidity in the ghee leads to formation of off-flavor and such an oxidized product is not accepted by the consumer; this leads to economic loss to the manufacturer. Detection of traces of rancidity at an early stage provides an opportunity for industry personnel to take suitable control measures and/or make decisions regarding utilization of the product.

Originality/value

The use of a reliable Kreis test that detects traces of rancidity in a ghee can be very useful for enabling suitable measures to be taken to prevent further oxidative deterioration or to dispose of the ghee as early as possible.

Details

British Food Journal, vol. 120 no. 1
Type: Research Article
ISSN: 0007-070X

Keywords

Content available
Article
Publication date: 1 March 2003

K. Narasimhan

92

Abstract

Details

Measuring Business Excellence, vol. 7 no. 1
Type: Research Article
ISSN: 1368-3047

Abstract

Details

Measuring Business Excellence, vol. 8 no. 1
Type: Research Article
ISSN: 1368-3047

Content available
Article
Publication date: 1 September 2000

K. Narasimhan

314

Abstract

Details

Measuring Business Excellence, vol. 4 no. 3
Type: Research Article
ISSN: 1368-3047

Content available
Article
Publication date: 1 June 2003

K. Narasimhan

505

Abstract

Details

Measuring Business Excellence, vol. 7 no. 2
Type: Research Article
ISSN: 1368-3047

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