Mixed-Mode Ventilation Based on Adjustable Air Velocity for Energy Benefits in Residential Buildings

Lichen Su (), Jinlong Ouyang and Li Yang ()
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Lichen Su: The College of Architecture and Environment, Sichuan University, Chengdu 610207, China
Jinlong Ouyang: The College of Architecture and Environment, Sichuan University, Chengdu 610207, China
Li Yang: The College of Architecture and Urban Planning, Tongji University, Shanghai 200092, China

Energies, 2023, vol. 16, issue 6, 1-17

Abstract: Energy efficiency and air quality in residential buildings have aroused intensive interest. Generally speaking, the heating, ventilation and air conditioning (HVAC) system is widely used to regulate indoor environmental spaces. Meanwhile, mixed-mode ventilation has been proven to reduce energy consumption and introduce fresh air effectively. This study aims to discuss the correlations between air velocity, temperature and indoor thermal comfort and establish corresponding statistical models based on the ASHRAE_db II database and the Predicted Mean Vote (PMV). On this basis, the air-velocity adjustment strategy, including determining adjustability and establishing adjustable intervals, is optimized based on support vector machine and envelope curve methods. The results show that the recognition accuracy of the adjustability determination model is over 98%, and the air-velocity adjustable interval in the envelope is increased, facilitating control of mixed-mode ventilation. The case shows that interval adjustment increases the sample points by 18.6% (18.1% above 20 °C and 4.5% above 28 °C). Therefore, further research can be supported on improving thermal comfort by air-velocity adjustment to take advantage of the mixed-mode ventilation mode, which is beneficial to building energy efficiency.

Keywords: mixed-mode ventilation; ASHRAE_db II database; PMV model; air-velocity adjustability; air-velocity adjustment interval; SVM; envelope curve (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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