41,585 Hits in 8.9 sec

Heat Exchanger Network Optimization Based on the Participatory Evolution Strategy for Streams

Jiaxing Chen, Guomin Cui, Mei Cao, Heri Kayange, Jian Li
2021 Energies  
The non-structural model of a heat exchanger network randomly selects a position of a node on hot and cold streams to generate a heat exchanger and an existing heat exchanger to participate in the evolution  ...  Therefore, many iterations are required to make each stream participate in the evolution, which limits the evolution efficiency of the optimization algorithm.  ...  controlled by means of the evolution probability.  ... 
doi:10.3390/en14248392 fatcat:bokzc7ooqrgnxdz3l4abhro62m

Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure

Jiaxing Chen, Qiguo Yang, Guomin Cui, Zhongkai Bao, Guanhua Zhang
2021 Processes  
Facing the current energy structure urgently needs to be transformed, heat exchanger network (HEN) can implement heat recovery and cost reduction by the arrangement for heat exchanges between cold and  ...  this work, then a back substitution strategy and elite optimization strategy based on algorithm are proposed.  ...  Stage-wised superstructure of heat exchanger network. Figure 1 . 1 Figure 1. Stage-wised superstructure of heat exchanger network. (a) MSWS. (b) SWS. 23 Figure 2 . 232 Figure 2.  ... 
doi:10.3390/pr9112060 fatcat:oklr5spoa5g2rochsmafr5sxum

Synthesis of a Cost-Optimal Heat Exchanger Network using Genetic Algorithm and Differential Evolution

Maria C. Aguitoni, Leandro V. Pavao, Paulo H. Siqueira, Laureano Jimenez, Mauro A. S. S. Ravagnani
2018 Chemical Engineering Transactions  
variables are optimized by Differential Evolution (DE).  ...  The heat exchanger network (HEN) synthesis problem can be characterized as non-convex, non-linear and highly combinatory.  ...  Acknowledgments The authors would like to acknowledge the Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES, Brazil) and the Brazilian National Council for Scientific and  ... 
doi:10.3303/cet1870164 doaj:b201ea68ed3443c49b70d3a11b844f58 fatcat:xuaoe4w7svck3dhccv7hqr37zm

Fuzzy Approach for Heat Exchanger Network

Dina S., M.H. Hussein, M.E. Awad
2015 International Journal of Computer Applications  
A systematic method for synthesis of heat exchanger networks by using fuzzy approach is presented in this paper, the proposed method consists of three sequential steps to select the optimal approach temperature  ...  The results of these case studies show that the present strategy is simple and accurate in finding out global optimum in comparison with previous works, characterized by its simplicity and can be implemented  ...  FUZZY APPROACH STRATEGY Based on the strategy of Fuzzy set theory the following algorithm was developed to select optimal heat exchanger networks and it consists of four steps: Step1.  ... 
doi:10.5120/ijca2015905565 fatcat:bxdafkxtkfhwjhd4rgm2phw3ne

Thermo-fluid dynamic model of large district heating networks for the analysis of primary energy savings

Elisa Guelpa, Adriano Sciacovelli, Vittorio Verda
2017 Energy  
ACKNOWLEDGEMENTS Authors are very grateful to the technicians of IREN for providing the operation data used in this work.  ...  During the day, the temperature evolutions present different peculiarities, depending on the heating strategy adopted by the users.  ...  This piece of information allows to know the evolution of the heat exchanged at each building and is used here for validating the model.  ... 
doi:10.1016/ fatcat:4cqeerqy6bdkbhoxvdebfjsh74

Simultaneous synthesis of heat exchanger network with the non-isothermal mixing

Zhao Liang, Yin Hongchao, Huo Zhaoyi
2013 International Journal of Low-Carbon Technologies  
Optimization of heat exchanger network is attributed to improving the process industrial energy utilization ratio.  ...  Three case studies illustrated the better performance of the initialization strategies and two-level algorithm for heat exchanger network synthesis problems, considering non-isothermal mixing.  ...  INSTRUCTION Heat exchanger network synthesis (HENS) problems were first defined and formulated by Masso and Rudd (1969) [1] .  ... 
doi:10.1093/ijlct/ctt064 fatcat:ixwcwoftx5crnacmln6r73evum

Thermal peak load shaving through users request variations

Vittorio Verda
2016 International Journal of Thermodynamics  
In this paper, a physical tool specifically conceived for the analysis of peak shaving in large networks through virtual storage is presented and applied to a portion of the Turin district heating network  ...  The analysis of possible operational strategies should be performed using an integrated simulation, which considers both the thermos-fluid dynamic behavior of the network and the thermal behavior of the  ...  Small or medium-scale focused research project (STREP) FP7-SMARTCITIES-2013 ICT-2013.6.4 Optimizing Energy Systems in Smart Cities.  ... 
doi:10.5541/ijot.5000175955 fatcat:vgiknhjkanfcbc35cyk43uptt4

Optimal operation of district heating networks through demand response

Vittorio Verda, Martina Capone, Elisa Guelpa
2019 International Journal of Thermodynamics  
In this paper, an optimization method aiming at minimizing the thermal peaks in district heating networks is proposed.  ...  The model is applied to a portion of the Turin district heating network, which is the largest network in Italy.  ...  Results By simulating the supply network it is possible to obtain the temperature values at the inlet of each user heat exchanger (T1).  ... 
doi:10.5541/ijot.519101 fatcat:n6ehb4iqkfewxd5g3vudlcw3ba

Peak-shaving in district heating systems through optimal management of the thermal request of buildings

Elisa Guelpa, Giulia Barbero, Adriano Sciacovelli, Vittorio Verda
2017 Energy  
The results are shown in Fig. 7 compared to the current strategy. This figure reports the increase of thermal energy covered by cogeneration and by boilers, by turning to the optimized strategy.  ...  This network is primarily fed by heat produced in cogeneration plants.  ... 
doi:10.1016/ fatcat:k2gkfx2sqzetro4q5odw5dbdoe

Towards low carbon business park energy systems: Classification of techno-economic energy models

Jonas Timmerman, Lieven Vandevelde, Greet Van Eetvelde
2014 Energy  
Low carbon business parks minimise energy-related carbon dioxide emissions by maximal exploitation of local renewable energy production, enhanced energy efficiency, and inter-firm heat exchange, combined  ...  The holistic approach of techno-economic energy models facilitates the design of such systems, while yielding an optimal trade-off between energetic, economic and environmental performances.  ...  Up to this moment, OSMOSE does not include the design and optimisation of a heat exchanger network.  ... 
doi:10.1016/ fatcat:dt4dliitovafzcsppgnkuqt5nq

A Critical Review and Annotated Bibliography for Heat Exchanger Network Synthesis in the 20th Century

Kevin C. Furman, Nikolaos V. Sahinidis
2002 Industrial & Engineering Chemistry Research  
This paper provides a critical review of the literature on heat exchanger network synthesis, the most commonly studied problem in process synthesis.  ...  After a review of solution methods, we discuss the chronological milestones in the development of the field and present several classification schemes of this body of work based on a number of modeling  ...  Acknowledgements The authors are grateful for partial financial support from the National Science Foundation under Grant CTS-9704643 and suggestions from several members of the CAST E-mail distribution  ... 
doi:10.1021/ie010389e fatcat:5mpw2gzq6bdvzc6mt3ij4meaga

Energy Consumption Optimization through Dynamic Simulations for an Intelligent Energy Management of a BIPV Building

Ilias Papas, Bruno Estibals, Christelle Ecrepont, Corinne Alonso
2018 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA)  
The hygienic ventilation system is also linked to a ground heat exchanger to minimize the heating/cooling energy needs of the air.  ...  Table 1 shows the evolution of the statistical indicators (NMBE (Normalized Mean Bias Error) and CVRMSE (Coefficient of Variation of Root Mean Square Error)) from the initial to the final simulation,  ... 
doi:10.1109/icrera.2018.8566915 fatcat:7ikdok64d5dfpa3vhr5suvs35i


Fran S. Lobato, Márcio A. da Silva, Aldemir A. Cavalini Jr., Valder Steffen Jr.
2019 Brazilian Journal of Chemical Engineering  
The inner optimization loop is used to find the solution associated with the highest probability value by using the so-called Inverse Reliability Analysis and the outer loop is the regular optimization  ...  The design of chemical systems is generally carried out by considering the model, the vector of design variables, and system parameters as deterministic values, i.e., small variations in these quantities  ...  ACKNOWLEDGEMENT The authors are thankful to the Brazilian research agencies CNPq, FAPEMIG and CAPES for the financial support of this research work through the National Institute of Science and Technology  ... 
doi:10.1590/0104-6632.20190361s20170392 fatcat:hdtb4bv2xbgt3bl3ruinc7d3cq

Simultaneous Optimization Strategy of Cost-optimal Heat Exchanger Network Synthesis with PSO Algorithm

2017 Revista Técnica de la Facultad de Ingeniería Universidad del Zulia  
In this paper, a novel solution strategy based on particle swarm optimization (PSO) algorithm is developed for simultaneous optimization of cost-optimal heat exchanger network synthesis (HENS).  ...  The proposed strategy is applied to four examples taken from previous research about HENS, and the results prove that the method is more effective to HENS problems.  ...  ACKNOWLEDGMENTS This work is supported by National Natural Science Foundation of China (No.51406027) and Fundamental Research Funds for the Central Universities" (No. DUT15QY49).  ... 
doi:10.21311/ fatcat:ftnb6cka2bbfzbo3cun3kig3re

Analysis of the energy performance of a ground source heat pump system after five years of operation

C. Montagud, J.M. Corberán, Á. Montero, J.F. Urchueguía
2011 Energy and Buildings  
Since then, GeoCool facility has been monitored by a network of sensors characterizing its most relevant parameters.  ...  Since then, GeoCool facility has been monitored by a network of sensors characterizing its most relevant parameters.  ...  ACKNOWLEDGEMENTS This work has been supported by FP7 project "Advanced ground source heat pump systems for heating and cooling in Mediterranean climate" (GROUND-MED).  ... 
doi:10.1016/j.enbuild.2011.09.036 fatcat:gxkevn6yb5clfcoxyvkgwpj2pa
« Previous Showing results 1 — 15 out of 41,585 results