A novel TRNSYS type for short-term borehole heat exchanger simulation: B2G model. (August 2015)

• Record Type: Journal Article
• Authors: De Rosa, Mattia; Ruiz-Calvo, Félix; Corberán, José M.; Montagud, Carla; Tagliafico, Luca A.
• Is Part Of: Energy conversion and management. Volume 100(2015)
• Page Start: 347
• Page End: 357
• Publication Date: 2015-08
• Subjects: Ground source heat pump -- Borehole heat exchanger -- Heating and cooling systems -- Dynamic modeling; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2015.05.021
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: A novel dynamic borehole heat exchanger model is presented. Theoretical approach for model parameters calculation is described. The short-term model is validated against experimental data of a real GSHP. Strong dynamic conditions due to the ON–OFF regulation are investigated. Abstract: Models of ground source heat pump (GSHP) systems are used as an aid for the correct design and optimization of the system. For this purpose, it is necessary to develop models which correctly reproduce the dynamic thermal behavior of each component in a short-term basis. Since the borehole heat exchanger (BHE) is one of the main components, special attention should be paid to ensuring a good accuracy on the prediction of the short-term response of the boreholes. The BHE models found in literature which are suitable for short-term simulations usually present high computational costs. In this work, a novel TRNSYS type implementing a borehole-to-ground (B2G) model, developed for modeling the short-term dynamic performance of a BHE with low computational cost, is presented. The model has been validated against experimental data from a GSHP system located at Universitat Politècnica de València, Spain. Validation results show the ability of the model to reproduce the short-term behavior of the borehole, both for a step-test and under normal operating conditions.