Control strategies, monitoring and management for the efficient behavior of Thermally Activated Building Systems (TABS)

Laera, Rossana and Martínez Pérez, Inmaculada and Pereda Fernández, Luis de and Tejedor López, Rafael and Tendero Caballero, Ricardo and Iannone, Francesco (2019). Control strategies, monitoring and management for the efficient behavior of Thermally Activated Building Systems (TABS). In: "2º Congreso Internacional de Gestión en Edificación (BIMIC 2019)", 8-10 May 2019, Madrid. ISBN 978-84-16397-91-4. pp. 77-78.

Description

Title: Control strategies, monitoring and management for the efficient behavior of Thermally Activated Building Systems (TABS)
Author/s:
  • Laera, Rossana
  • Martínez Pérez, Inmaculada
  • Pereda Fernández, Luis de
  • Tejedor López, Rafael
  • Tendero Caballero, Ricardo
  • Iannone, Francesco
Item Type: Presentation at Congress or Conference (Other)
Event Title: 2º Congreso Internacional de Gestión en Edificación (BIMIC 2019)
Event Dates: 8-10 May 2019
Event Location: Madrid
Title of Book: Proceedings
Date: 2019
ISBN: 978-84-16397-91-4
Subjects:
Freetext Keywords: Themally Activated Building Systems (TABS), Building Management Systems (BMS), Energy efficiency, Thermal comfort
Faculty: E.T.S. de Edificación (UPM)
Department: Construcciones Arquitectónicas y su Control
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Thermally Activated Building Systems (TABS) play an essential role in the thermal response of buildings, in terms of energy storage and dynamic adaptation. TABS can operate with low temperature, allowing the efficient utilization of renewable energy. The key to taking the maximum advantage of these systems is to get control of their inertial behavior, that depends on a wide number of operative parameters and boundary factors. Therefore, their storage and thermal capacity needs to be managed by a control system, that is able to shift TABS operation to time periods when energy production is most efficient and cost-effective. TABS control strategies are, indeed, part of an integrated process that includes the design phase, commissioning, monitoring, and optimization during operation. A proper methodology of energy audit and management has been defined for an existing office building, located at calle Apolonio Morales 29, Madrid (Spain), that is a case of building energy renovation with TABS integration. The HVAC system combines both active and passive utilization of solar and geothermal energy, while using inertial and instant devices simultaneously for heating and cooling. In winter, during nighttime, heat pumps run to recharge floors and prevent activation peaks in the morning. In summer, during the night, the heat pumps operate to cool slabs, so that the building is pre-cooled on the next day. This strategy takes advantages of the high inertia of the building structure. The phenomena that take place during daytime and nighttimedepend on whether the mass material is being charged o r discharged. In this way, thermal energy is produced when costs are lower, utilizing the reduced night rate for electricity. Then, energy is stored within the structure and dissipated throughout the day. TABS operation takes place under the control of an integrated system of sensors and the smart management of a control system. It enables the energy manager to analyze trends and the mutual relationship between different operative parameters. These include internal and external air temperature, concrete-slab temperature, temperature of water flowing in radiant circuits, energy consumption, the opening state of the valves that adjust the supply-water flow rate, depending on the setpoints programmed on each floor. Monitoring of the building?s performance is possible thanks to the availability of historical and real-time data, provided by the control system. The analysis of trend log lists and trend charts allows the energy manager to adopt strategies, with the aim to reduce the trade-off between energy savings and occupant thermal comfort. In line with the standards pursued by the LEED Rating System, a systematic audit procedure is conducted, aiming at the optimization of TABS energy performance, with the identification of energy waste and the execution of corrective operations for thermal comfort improvement. It has been proven that proper optimizing operations conducted after TABS commissioning are essential to adapt the operative parameters and setpoints to the effective situation in buildings. In the frame of this process, further management suggestions may arise, including new proposals for TABS design and integration, monitoring and control.

More information

Item ID: 64733
DC Identifier: http://oa.upm.es/64733/
OAI Identifier: oai:oa.upm.es:64733
Deposited by: Memoria Investigacion
Deposited on: 29 Oct 2020 09:13
Last Modified: 29 Oct 2020 09:15
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