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This paper presents new methods for superstructure heat exchanger network synthesis (HENS) and mass exchanger network synthesis (MENS). The techniques developed in this study explore the use namely supply temperatures/compositions and target temperatures/ compositions in HENS and MENS to define the intervals of superstructures. Such superstructures are modelled as mixed integer non linear programmes...
Carbon dioxide (CO2) emission reduction targeting is an important move in atmospheric CO2 concentration control. Idea of applying HEN retrofit and fuel switching in existing plant has been proposed to be applied simultaneously in achieving CO2 emissions reduction. Graphical approach combining the mentioned idea has been proposed, but involves potentially time consuming manual procedures. Besides,...
This paper explores the application of Non-Linear Autoregressive Model with Exogenous Inputs (NARX) system identification of heat exchanger system. Model structure selection was performed using the Binary Particle Swarm Optimization (BPSO) algorithm. The application of BPSO for model structure selection represents each particle's position as binary values, which were used to select a set of regressors...
In order to reduce air-conditioning energy consumption of original computer room, an isolated heat exchange system is added to Beijing Unicom computer room. The steady-state model of the heat exchange system is built using mechanism modeling method according to actual operating data and the basic principles of heat transfer process. The optimal operating point of the system is obtained with the help...
Geothermal energy use from shallow groundwater systems is attractive for the supply of heat and hot water to buildings. It offers economic and environmental advantages over traditional fossil-fuel based technologies, in particular when large scale systems are well adapted to the always unique hydrogeological conditions. Computer based numerical simulations are used to examine the performance of multiple...
The objective of this work is the development of DMC for a shell and tube heat exchanger and to address the difficulties in tuning a DMC. Although the PID controller is widely used for these types of applications there is still a need for optimization of conservation of energy. In this paper a model based predictive algorithm is used for controlling a temperature of a fluid stream using the shell...
Plate-fin heat exchanger has been widely used in chemical, mechanical and electronic engineering etc. The optimal design of PFHE is an important method to improve the performance of PFHE. According to the engineering requirements, the minimum weight, higher heat efficiency and reasonable pressure loss are set as optimal objectives of PFHE, which is termed as multi-objective optimal problem. To implement...
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