A study on energy storage characteristics of industrial steam heating system based on dynamic modeling

Abstract

The development of the industrial steam heating system has made power and thermal system more closely linked. Accordingly, the use of the steam network’s energy storage capability to improve the rapid load change capacity of thermal plants has become a new topic. The industrial steam heating system (ISHS) contains a large number of pipes and heat exchange equipment. The key is to understand the energy storage capability of the system by analogy and quantitative study. This study carries out the heat storage capability analysis of the industrial steam heating system through dynamic modeling. This study builds an actual pipe model in a chemical park by Modelica language and validates the model against field data collected on the site. The model deviation is less than 3%. Based on the validated model, this study carries out heat storage and discharge characteristics quantification by investigating three basic regulation modes: temperature regulation mode (quality regulation), the mass flow rate regulation mode (quantity regulation), and the hybrid mode. Through comparison, this study finds that the steam heating system has the highest analogized storage volume and longest heating discharge time under hybrid mode. From the perspective of utilizing system heating storage characteristics and saving the investment, hybrid regulation mode outperforms quality and quantity regulation mode. ISHS with hybrid mode has the potential to participate in short-term coordination control of electricity and heat in industrial parks.

Keywords

• Steam heating
• Thermal storage
• Dynamic modeling