Development and Experimental Validation of a TRNSYS Dynamic Tool for Design and Energy Optimization of Ground Source Heat Pump Systems

Abstract

Ground source heat pump (GSHP) systems stand for an efficient technology for renewable heating and cooling in buildings. To optimize not only the design but also the operation of the system, a complete dynamic model becomes a highly useful tool, since it allows testing any design modifications and different optimization strategies without actually implementing them at the experimental facility. Usually, this type of systems presents strong dynamic operating conditions. Therefore, the model should be able to predict not only the steady-state behavior of the system but also the short-term response. This paper presents a complete GSHP system model based on an experimental facility, located at Universitat Politècnica de València. The installation was constructed in the framework of a European collaborative project with title GeoCool. The model, developed in TRNSYS, has been validated against experimental data, and it accurately predicts both the short-and long-term behavior of the system.

Assessment of Energetic, Economic and Environmental Performance of Ground-Coupled Heat Pumps

“…[13][14][15][16]. Studies on GCHPs applications in European [17][18][19][20][21], American [22,23] and Asian climates [24,25] have been performed, in single residential or office building cases. Analyses of economic feasibility and environmental benefits for residential buildings were carried out by Lu et al [26], Morrone et al [27], and Chang et al [28].…”

Relation Between Mean Fluid Temperature and Outlet Temperature for Single U-Tube Boreholes

“…Indeed, GCHPs are a very efficient technology for the climatization of buildings and the production of domestic hot water [1]. The performance of these systems has been analyzed by experiments and by simulation tools [2][3][4][5][6][7]. GCHPs usually utilize buried vertical heat exchangers, named borehole heat exchangers (BHEs), that are mostly composed of a single or double polyethylene U-tube, installed in a drilled hole subsequently filled with a grouting material.…”

Seasonal performance assessment of a dual source heat pump system for heating, cooling and domestic hot water production

“…In order to model the control and operation of the system, a PID was included to set the frequency of the heat pump compressor, as well as other controllers to vary the frequency of the circulation pumps, and to control the temperature setpoint and on/off of the heat pump). A previous stage of this model was presented and analysed in and (Ruiz-Calvo, et al 2017). The model was prepared in a modular way, so that it allowed modifiying and adapting the components to different installations, as well as easily testing different optimization and control strategies.…”

“…This paper presents the energy assessment of the DSHP integrated system for heating, cooling and DHW production in an institutional type of building existing at the Universitat Politècnica de València, in Spain, which was constructed in the 1970s. This specific building was compeletely modelled in TRNSYS and validated against experimental data as a part of a GSHP system model of an existing installation that provides heating and cooling to several offices inside the building (Ruiz-Calvo, et al 2017). The existing GSHP installation was built in the framework of the GeoCool project (European Commision 2003) and it was refurbished and optimized in the framework of the Ground-Med project (European Commision 2009).…”