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Buildings 2017, 7(3), 55;

Outdoor Characterization of Phase Change Materials and Assessment of Their Energy Saving Potential to Reach NZEB

Department of Enterprise Engineering, University of Rome ‘Tor Vergata’, Via del Politecnico, 1, 00133 Rome, Italy
Institute for Renewable Energy, EURAC Research, Bolzano 39100, Italy
EnUp srl, Via dei Monti di Primavalle, 151, 00168 Rome, Italy
Author to whom correspondence should be addressed.
Received: 7 April 2017 / Revised: 16 June 2017 / Accepted: 17 June 2017 / Published: 22 June 2017
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Phase change materials (PCM) are very promising materials for improving energy efficiency in buildings, especially in hot weather conditions. In spite of the growing attention paid to the integration of PCM into buildings, there are few studies on PCM evaluation under real operating conditions. This lack of data often does not allow accurate calibration and validation of building simulation models. This work aims to characterize a commercial PCM panel by RUBITHERM®. The panel was laid on the floor of a test box exposed outdoors, and the experimental data were used to validate a PCM software tool implemented in IDA Indoor Climate and Energy software. A reference office building model with characteristics prescribed by Italian regulations (STD) was provided with three PCM with melting points of approximately 21 °C, 24 °C and 26 °C, laid on the floor office. The building energy performance obtained was compared to the energy performance of a reference building prescribed by the new Italian building energy performance regulation (NZEB) for three cities in Italy (Trento, Rome and Palermo). The results showed that energy savings obtained from implementing PCM in the STD building were not sufficient to reach the NZEB reference value for all cities. Only the use of night ventilation was able to assist in reaching NZEB. PCM with a 21 °C melting point showed the best annual energy saving performance in all cities. Temperature range and temperature peaks experienced by PCM in the day/night cycle can explain the behavior of these materials in the various cities and seasons as latent and sensible heat storage systems. View Full-Text
Keywords: PCM; dynamic simulation; IDA ICE; outdoor monitoring; validation; NZEB PCM; dynamic simulation; IDA ICE; outdoor monitoring; validation; NZEB

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Cornaro, C.; Pierro, M.; Puggioni, V.A.; Roncarati, D. Outdoor Characterization of Phase Change Materials and Assessment of Their Energy Saving Potential to Reach NZEB. Buildings 2017, 7, 55.

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