TY - GEN
T1 - Double envelope unitized curtain wall for solar preheating of ventilation air
AU - Garay-Martinez, Roberto
AU - Gonzalez, Diego
AU - Alvarez, Izaskun
AU - Arregi, Beñat
AU - Sagarduy, Gorka
N1 - Publisher Copyright:
© 2020 and published by the Architectural Science Association (ANZAScA).
PY - 2020
Y1 - 2020
N2 - Despite recent efforts on energy performance improvement, curtain walls remain a significant contributor to the energy consumption of commercial buildings. A novel double envelope unitized curtain wall system is presented, aimed at the substantial improvement of the energy performance of glazed systems. Outdoor air is ventilated through an integrated cavity in its paths to the ventilation air intake of the air handling unit. In its path through the glazed envelope, the air is heated from both incident solar radiation and transmission losses recovered from the indoor environment. A substantial energy performance improvement is achieved by means of the preheating of fresh air. Energy consumption is reduced in the heating season, and even net gains above the heating demand are delivered under favorable conditions. By-pass elements are integrated to allow free cooling and natural ventilation when required in cooling mode. In this way, the double envelope also provides advantages in summer mode, where solar heat gain coefficients are substantially lower than for other systems due to the double envelope and the ventilation of the cavity to the ambient. The overall architectural concept, engineering design and outcomes of an experimental campaign over a 2-story full scale test in Spain are presented.
AB - Despite recent efforts on energy performance improvement, curtain walls remain a significant contributor to the energy consumption of commercial buildings. A novel double envelope unitized curtain wall system is presented, aimed at the substantial improvement of the energy performance of glazed systems. Outdoor air is ventilated through an integrated cavity in its paths to the ventilation air intake of the air handling unit. In its path through the glazed envelope, the air is heated from both incident solar radiation and transmission losses recovered from the indoor environment. A substantial energy performance improvement is achieved by means of the preheating of fresh air. Energy consumption is reduced in the heating season, and even net gains above the heating demand are delivered under favorable conditions. By-pass elements are integrated to allow free cooling and natural ventilation when required in cooling mode. In this way, the double envelope also provides advantages in summer mode, where solar heat gain coefficients are substantially lower than for other systems due to the double envelope and the ventilation of the cavity to the ambient. The overall architectural concept, engineering design and outcomes of an experimental campaign over a 2-story full scale test in Spain are presented.
KW - Curtain wall
KW - Experimentation
KW - Solar heat
KW - Ventilation
UR - http://www.scopus.com/inward/record.url?scp=85103625482&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85103625482
VL - 2020
T3 - Proceedings of the International Conference of Architectural Science Association
SP - 425
EP - 431
BT - ANZAScA 2020 - 54th International Conference of the Architectural Science Association
A2 - Ghaffarianhoseini, Ali
A2 - Ghaffarianhoseini, Amirhosein
A2 - Naismith, Nicola
A2 - Purushothaman, Mahesh Babu
A2 - Doan, Dat
A2 - Aigwi, Esther
A2 - Rotimi, Funmi
A2 - Ghodrati, Nariman
PB - Architectural Science Association
T2 - 54th International Conference of the Architectural Science Association, ANZAScA 2020
Y2 - 26 November 2020 through 27 November 2020
ER -