Integrated heating and cooling system with borehole thermal energy storage for a greenhouse in Romania

The IDA Indoor Climate and Energy (IDA ICE) simulation tool is used to model a research greenhouse in Bucharest, Romania, equipped with a recently implemented energy system that includes an integrated heat pump system, Air Handling Units (AHUs), a dry cooler, and boreholes for thermal energy storage. The integrated heat pump system is designed to provide year-round heating and cooling of the greenhouse. The performance of the system is assessed through simulations conducted for one week in summer (July 2023) and one week in winter (December 2023), using recorded weather data for each respective period. Results from the IDA ICE model are compared with values derived from onsite sensor measurements. During the summer week, the model generally aligns with measured air temperatures in the greenhouse compartment. The total cooling simulated in the model is 26.5 kWh/m 2 , compared to 27.2 kWh/m 2 calculated from onsite measurements. Hourly discrepancies were observed, potentially due to the heat pump system operating at reduced capacity during this summer. In the winter week, the measured and simulated temperatures fall within a comparable range. The calculated and simulated cumulative heating show excellent agreement, both at 15.1 kWh/m 2 . • Greenhouse with integrated heat pump system and borehole thermal energy storage. • Modelling of energy system performance in the building simulation tool IDA ICE. • Total cooling delivered in the model during a week in July 2023 is 26.5 kWh/m 2 . • Total heating of 15.1 kWh/m 2 for a week in December 2023. • Good overall agreement between model results and measured data.