Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Modeling and simulation of district heating and cooling systems using CityBES

Han Li, Tianzhen Hong, Wanni Zhang
Lawrence Berkeley National Laboratory, United States of America

Abstract: District Energy Systems (DES), compared with traditional individual in-building energy systems, can save mechanical room space and energy costs, as well as taking advantage of the load diversity between individual buildings to reduce plant equipment installed capacity and potentially recover heat between buildings. With the increasing environmental awareness and needs for flexibility and resiliency, DES have gained more interests worldwide. Methods and tools are needed to efficiently plan and design DES. This paper presents the new DES simulation and evaluation feature of CityBES - a webbased urban scale simulation and data analytics platform. It first introduces the functionalities of the DES feature, which includes visualization of district load profiles and key statistics, and DES selection, configuration and simulations. Then, it presents a case study of two example districts with different sizes in two cities in the United States with the DES feature of CityBES to showcase how it can support preliminary comparison and selection among several common DES options. The energy consumption and simple economics metrics are compared among common district systems in both examples, including: (1) central boilers and chillers, (2) central boilers and chillers with ice-storage, (3) heat-recovery chillers with heat-pumps, and (4) ground-source heatpumps.
Keywords: District Energy System, Modeling, Tools
Pages: 1077 - 1082