The Pinch Design Method for Heat Exchanger Networks Considering the Heat Capacity Flowrate of a Stream with Variation in Temperature

2011 ◽  
Vol 396-398 ◽  
pp. 1048-1054
Author(s):  
Fei Long Zhang ◽  
Shu Rong Yu ◽  
Ling Shen
Keyword(s):  
Heat Capacity ◽  
Heat Exchanger ◽  
Design Method ◽  
Location Choice ◽  
Heat Exchanger Network ◽  
Heat Exchanger Networks ◽  
Novel Method

a novel method of locating the pinch is presented for the design of heat exchanger networks. The method is based on the pinch design method for heat exchanger networks which was first introduced by Linnhoff. The method first consider the heat capacity flowrate of a stream with variation in temperature. This is because heat capacity flowrate of a stream with variation in temperature not only affect minimum utility requirement for heat exchanger network but also affect the pinch location, choice ofΔTmin.

The New Pinch Design Method for Heat Exchanger Networks

2012 ◽  
Vol 512-515 ◽  
pp. 1253-1257 ◽  
Author(s):  
Fei Long Zhang ◽  
Shu Rong Yu ◽  
Ling Shen ◽  
Qiu Ping Zhao
Keyword(s):  
Heat Capacity ◽  
Heat Exchanger ◽  
Heat Loss ◽  
Design Method ◽  
Location Choice ◽  
New Method ◽  
Heat Exchanger Network ◽  
Heat Exchanger Networks

a new method of locating the pinch is presented for the design of heat exchanger networks. The method is based on the pinch design method for heat exchanger networks which was first introduced by Linnhoff. The method first consider both the heat loss of a hot stream and the heat capacity flowrate of a stream with variation in temperature in the design of heat exchanger networks. Which affect not only minimum utility requirement for heat exchanger network but also the pinch location, choice ofΔTmin

Synthesis of Large-Scale Heat Exchanger Network Based on Sub-Networks

2011 ◽  
Vol 236-238 ◽  
pp. 633-636
Author(s):  
Xin Guan ◽  
Zhi Bo Guo ◽  
Wen Jing Tu
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Large Scale ◽  
New Method ◽  
Heat Exchanger Network ◽  
Heat Exchanger Networks ◽  
Minlp Problem

The optimization of heat exchanger networks (HEN) is a typical MINLP problem. For large-scale HEN, it is difficult to solve this problem globally. After optimization, the large-scale HEN is divided into several independent sub-networks automatically. The sub-network is defined as a part of the HEN in which the streams have no heat transfer with the streams outside the sub-network. If a HEN can be divided into two or more sub-networks, then, these sub-networks are independent from each other. Based on optimization of sub-networks, a new method which can solve large-scale HEN problem efficiently is proposed.

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.

The pinch design method for heat exchanger networks

1983 ◽  
Vol 38 (5) ◽  
pp. 745-763 ◽  
Author(s):  
B. Linnhoff ◽  
E. Hindmarsh
Keyword(s):  
Heat Exchanger ◽  
Design Method ◽  
Heat Exchanger Networks

scholarly journals HEAT EXCHANGER NETWORK SYNTHESIS CONSIDERING CHANGING PHASE STREAMS

2004 ◽  
Vol 3 (2) ◽  
pp. 87
Author(s):  
F. S. Liporace ◽  
F. L. P. Pessoa ◽  
E. M. Queiroz
Keyword(s):  
Heat Exchanger ◽  
Temperature Difference ◽  
Design Method ◽  
Network Synthesis ◽  
Heat Exchanger Network ◽  
Pinch Point ◽  
Specific Heats ◽  
Temperature Ranges ◽  
Heat Exchanger Network Synthesis

The Pinch Design Method was developed considering one-phase streams, with constant specific heats (Cp) throughout streams’ temperature ranges. Its first stage, the determination of utilities targets and pinch point (PP), is ruled by the number of streams, their temperatures and MCp. But, for changing phase streams, the usual description of the Cp behavior by a constant value can lead to errors in this stage and, hence, in the synthesis one. This work proposes a procedure to deal with these streams and discusses its results through an example involving multicomponent streams. First, bubble (BP) and dew (DP) points of the streams are estimated. Then, changing phase streams are split into sub-streams, using BP and DP as bounds. For each one, an effective Cp is estimated as the division of the enthalpy change by the respective temperature difference. Results obtained show significant changes on the PP, utilities targets and network proposed structure.

A novel method based on entransy theory for setting energy targets of heat exchanger network

2017 ◽  
Vol 25 (8) ◽  
pp. 1037-1042 ◽  
Author(s):  
Li Xia ◽  
Yuanli Feng ◽  
Xiaoyan Sun ◽  
Shuguang Xiang
Keyword(s):  
Heat Exchanger ◽  
Heat Exchanger Network ◽  
Entransy Theory ◽  
Novel Method
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