Primary Network Operational Optimization and Algorithm of a District Heating System

ZHOU Shou-jun; PAN Ji-hong; WANG Qing-feng; ZHAO You-en; TIAN Mao-cheng

Journal of Beijing University of Technology > 2012 > 38(4): 628-635.

ZHOU Shou-jun, PAN Ji-hong, WANG Qing-feng, ZHAO You-en, TIAN Mao-cheng. Primary Network Operational Optimization and Algorithm of a District Heating System[J]. Journal of Beijing University of Technology, 2012, 38(4): 628-635.

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Primary Network Operational Optimization and Algorithm of a District Heating System

1. School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
2. School of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China;
3. Department of Computer Science and Technology Shandong Economic University, Jinan 250014, China

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Received Date: June 14, 2009
Available Online: December 02, 2022

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Abstract

An operational cost equation of a primary network in a district heating system is set up,taking the supply water temperature and the water flux as variables.The optimization objective of the equation is to minimize the operational cost,and its constraints are operational characteristics of the primary network.Based on the nonlinear programming theory,a constraint problem is then translated into an unconstrained one through the general constrained multiplier method,the conjugate gradient and linear search method are integrated together to solve the optimization problem,and the corresponding software program is also developed.Finally,the presented method and the step-by-step method are separately applied to a real urban district heating system.Result shows that the former is more effective and accurate than the later;the energy saving effect of quality-quantity regulation guided by the presented method is compared with the one of quality regulation,the former is proved to be prior to the later.
- district heating,
- operational optimization,
- nonlinear programming,
- unconstrained optimization,
- the conjugate gradient method

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