A TRNSYS modeling approach to optimize the design and operation of heat pump systems in district energy networks
Room 5
August 26, 11:45 am-12:00 pm
This paper introduces a new method for modeling heat pump systems in district energy networks. A new TRNSYS component is developed to simultaneously manage heating and cooling loads. The heat pump component prioritizes meeting both cooling and heating demands through heat recovery between the two loops. When these demands are unbalanced, the heat pump component dynamically interacts with an external renewable source or sink to fully meet the loads, simplifying the simulation of hybrid modes within district energy systems.
The proposed heat pump model relies on an improved performance map that includes outlet temperatures at the condenser and evaporator, as well as a newly defined compressor sequence number (CSN), providing a more accurate representation of heat pump operation under varying conditions. This method improves upon traditional part-load ratio (PLR) correction methods, ensuring consistency when both heating and cooling are considered useful effects.
The paper describes the implementation of the component in the simulation software TRNSYS and demonstrates its usefulness through a case study for a mixed neighborhood in Montréal, Quebec, Canada.
Presenters
Mathilde Gallant
Polytechnique Montréal