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Author of several well-received Process Engineering Guides in Heat Transfer, Peter Hills brings more than 25 years of experience in a variety of thermal applications. The book provides a practical insight into the design, operations, specification, and purchasing of heat transfer equipment. The engineer is led through logical understanding of all processes involved and taught to distinguish the practical applications from the computer codes. Covers a wide and detailed variety of process and power equipment.
340 pages, © 2005
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Table of contents: |
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CHAPTER 4 - THERMAL DESIGN MARGINS FOR HEAT EXCHANGERS |
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4.3 REASONS FOR SPECIFYING A DESIGN MARGIN |
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| 4.3.1 Instantaneous Rates |
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| 4.3.5 Uncertainties in properties |
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| 4.3.6 Uncertainties in design methods |
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4.4 COMBINATION OF DESIGN MARGINS |
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4.5 CRITICAL AND NON CRITICAL DUTIES |
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| 4.5.2 Penalties of Over-Design |
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4.6 OPTIMISATION OF EXCHANGER DUTY |
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4.7 WAYS OF PROVIDING DESIGN MARGINS |
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| 4.7.1 The provision of excess surface |
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| 4.7.2 Decreasing the design temperature difference |
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| 4.7.3 Increasing the design process throughput |
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| 4.7.4 Increasing the design fouling resistance |
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| 4.7.5 Reducing the design process outlet temperature approach |
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| 4.7.6 Adjusting the physical properties |
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4.8 ACCURACY OF THE DESIGN METHODS FOR SHELL AND TUBE EXCHANGERS |
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| 4.9.1 No Phase Change duties |
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4.10 EFFECT OF UNDER- OR OVER-SURFACE ON PERFORMANCE |
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