Pinch locations at heat capacity flow-rate disturbances of streams for minimum utility cost heat exchanger networks

2000 ◽  
Vol 20 (15-16) ◽  
pp. 1481-1494 ◽  
Author(s):  
Jacek Jeżowski ◽  
Roman Bochenek ◽  
Alina Jeżowska
Keyword(s):  
Heat Capacity ◽  
Heat Exchanger ◽  
Flow Rate ◽  
Heat Exchanger Networks ◽  
Utility Cost

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

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.

Dynamic Optimization of the Flow Rate Distribution in Heat Exchanger Networks for Fouling Mitigation

2015 ◽  
Vol 54 (25) ◽  
pp. 6497-6507 ◽  
Author(s):  
Bruna C. G. Assis ◽  
Julia C. Lemos ◽  
Fábio S. Liporace ◽  
Sérgio G. Oliveira ◽  
Eduardo M. Queiroz ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Dynamic Optimization ◽  
Flow Rate ◽  
Rate Distribution ◽  
Fouling Mitigation ◽  
Heat Exchanger Networks

The Ground Source Heat Pump: A System Analysis With a Particular Focus on The U-Pipe Borehole Heat Exchanger

2010 ◽  
Author(s):  
Hatef Madani ◽  
Jose Acun˜a ◽  
Joachim Claesson ◽  
Per Lundqvist ◽  
Bjo¨rn Palm
Keyword(s):  
Heat Capacity ◽  
Heat Exchanger ◽  
Mass Flow Rate ◽  
Heat Pump ◽  
Mass Flow ◽  
Flow Rate ◽  
Field Measurements ◽  
Ground Source Heat Pump ◽  
Borehole Heat Exchanger ◽  
Ground Source

The mass flow rate of the secondary refrigerant flowing in the borehole heat exchanger of a ground source heat pump is an influential system parameter whose variation can influence the pumping power, efficiency of the pump, heat distribution in the borehole, heat pump heat capacity, and above all, the system Overall Coefficient Of Performance (COP). The present paper uses both in-situ field measurements and modeling to evaluate these effects. From the field measurements, it can be concluded that the thermal contact between U-pipe channels increases as the brine mass flow rate decreases. Furthermore, the modeling results show that there is a certain optimum brine mass flow rate which gives a maximum overall system COP. Different optimum mass flow rates are obtained for different compressor speed and it is shown that their relation is almost linear. However, concerning system COP maximization, it can be concluded that a constant but carefully-selected brine mass flow rate can still be an appropriate option for the variable capacity heat pump unit studied in the present paper where the compressor frequency changes between 30Hz and 75Hz. Concerning the heat capacity maximization in the system, a variable speed brine pump can be used to help the insufficiently-sized compressor to cover the peak heat demand of the building.

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