AN ALGORITHM TO DEVELOP HEAT EXCHANGER NETWORKS WITH THE MINIMUM NUMBER OF STREAM SPLITS AND MAXIMUM ENERGY RECOVERY

1984 ◽  
pp. 583-598 ◽  
Author(s):  
K.W. Hanson ◽  
A.R.H. Cornish
Keyword(s):  
Heat Exchanger ◽  
Energy Recovery ◽  
Maximum Energy ◽  
Heat Exchanger Networks ◽  
Minimum Number

Differences Between Second Law Analysis and Pinch Technology

1995 ◽  
Vol 117 (3) ◽  
pp. 186-191 ◽  
Author(s):  
D. A. Sama
Keyword(s):  
Heat Exchanger ◽  
Energy Recovery ◽  
Maximum Energy ◽  
Global Optimum ◽  
Second Law ◽  
Heat Exchanger Network ◽  
Second Law Analysis ◽  
Heat Exchanger Networks ◽  
Pinch Technology ◽  
Correct Design

The use of second law analysis to design a heat exchanger network is compared with the pinch technology approach. Differences between the two methods are identified and discussed in the light of claims made by practitioners of pinch technology. Second law insights are used to easily identify and correct design errors in a heat exchanger network, and to design maximum energy recovery networks. More importantly, it is found that use of the second law provides an understanding of the process which is totally absent in the pinch technology approach. The claims that pinch technology can find global optimum solutions, that only pinch technology can find maximum energy recovery heat exchanger networks, and that pinch technology is a form of second law analysis, are considered, discussed, and shown to be invalid.

scholarly journals Energy efficiency improvement in the system for drying baker`s yeast

2019 ◽  
Vol 38 (1) ◽  
pp. 115
Author(s):  
Aleksandar Kosta Anastasovski
Keyword(s):  
Heat Exchanger ◽  
Energy Recovery ◽  
Process Integration ◽  
Waste Heat ◽  
Heat Energy ◽  
Production Costs ◽  
Main Task ◽  
Heat Process ◽  
Heat Exchanger Networks ◽  
Heat Energy Recovery

Drying processes are one of the main consumers of heat energy in production. Any decreases in heat consumption during the drying process will considerably decrease production costs. This study analyzes the high consumption of heat in the drying of baker`s yeast. The main task is to minimize the energy demand and lower the price of the final products with partial heat recovery. These changes will require system modifications. One of the most popular and effective methods that can be used in this case is heat process integration with Pinch Technology. In this study, a reference system was simulated with a mathematical model and analyzed for waste heat streams.This paper suggests the redesigning of a drying system for production of active dry yeast.  Selected streams that satisfy conditions for heat process integration were involved in the evaluation for a better solution. Two different scenarios were proposed as possible solutions. The suggested solutions are retrofit designs of Heat Exchanger Networks. These Heat Exchanger Networks include already installed heat exchangers as well as new heat transfer units. The selection of better design was made with economic analysis of investment. The proposed scenarios of the analyzed sub-system give improvement in heat energy recovery. The best determined solution reduces the cost and thus has the highest profitability, but not the highest heat energy recovery.

A deterministic algorithm for the synthesis of maximum energy recovery heat exchanger network

2007 ◽  
Vol 31 (7) ◽  
pp. 773-781 ◽  
Author(s):  
Massimiliano Errico ◽  
Sara Maccioni ◽  
Giuseppe Tola ◽  
Paola Zuddas
Keyword(s):  
Heat Exchanger ◽  
Energy Recovery ◽  
Deterministic Algorithm ◽  
Maximum Energy ◽  
Heat Exchanger Network

On the Minimum Number of Units in Heat Exchanger Networks

2014 ◽  
Vol 53 (44) ◽  
pp. 16899-16904 ◽  
Author(s):  
Miguel Bagajewicz ◽  
Gary Valtinson
Keyword(s):  
Heat Exchanger ◽  
Heat Exchanger Networks ◽  
Minimum Number

Efficiency and Effectiveness of Heat Exchanger Series

2008 ◽  
Vol 130 (8) ◽  
Author(s):  
Ahmad Fakheri
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
Single Equation ◽  
Algebraic Expression ◽  
Heat Exchanger Networks ◽  
Efficiency And Effectiveness ◽  
Minimum Number ◽  
In Series ◽  
The Individual ◽  
Traditional Approaches

Abstract The concept of heat exchanger efficiency is extended to the heat exchanger networks. General expressions that can be used for determining the overall efficiency and effectiveness of heat exchangers connected in series regardless of the heat exchanger type have been presented. A simple, accurate, approximate algebraic expression is provided for determining the efficiency of the heat exchanger. The approach presented is far more general compared to the traditional approaches, providing the designer the flexibility to select the efficiency of the individual heat exchangers, the overall system efficiency, the number of heat exchangers, as well as the type of heat exchanger to select, by utilizing a single equation. An expression is derived for determining the minimum number of shells, as a convenient alternative for the traditional methods currently in use.

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