Monday, 27 June 2016: 8:00 AM-9:30 AM
Renewable Energy Systems and Net Zero Buildings
Chair:
Wangda Zuo, Ph.D., University of Miami
Technical Committee: 04.10 Indoor Environmental Modeling
CoSponsor: 06.07 Solar Energy Utilization
Renewable energy is essential for the realization of net zero buildings. This seminar invites researchers from both architecture and engineering disciplines to demonstrate how to use modeling technologies such as computational fluid dynamics to improve the design of the renewable energy systems in buildings. The researchers introduce the applications of modeling technologies in the design of building envelopes and building systems such as the heating system with various renewable energy sources. The impacts of the renewable energy on the building energy performance, CO2 emission, and the indoor thermal comfort are also discussed.
1 Zero Coal and Low Emission Heating in Rural Houses: What Does It Mean to Energy and Environment in China?
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Xudong Yang, Ph.D., Tsinghua University |
The speaker introduces current situations and trends of energy use in Chinese rural buildings, followed by setting up a goal to achieve zero coal and low emission heating. He then addresses a subset of problems that are important to low emission heating in Chinese rural housing. These are the need to: improve the thermal integrity of rural housing; develop biomass utilization technologies for heating and cooking; develop solar energy utilization technologies for heating and hot water supply. Strategies for reducing the use of coal and CO2 emissions in rural communities are discussed with demonstration projects.
2 Utilizing CFD for Passive Solar Design Validation
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Shan He, Iowa State University |
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Ulrike Passe, AIA, Iowa State University |
While contemporary architects desire the integration of passive solar heating strategies into design concepts, energy performance is still difficult to predict due to the complexity of related physics. Few energy modeling tools provide passive solar heating because the selection of CFD turbulence models for buoyancy low velocity phenomena and solar radiation models remain a challenge. Utilizing the Interlock House, a 2009 US DOE Solar Decathlon home and Iowa NSF EPSCoR community lab our team conducted refined measurements of passive solar heating effects on a sunny day (March 8th, 2015) in order to validate new approaches to CFD model selection.
3 Semitransparent PV Glazed Second Façade in Building’s Refurbishment: Indoor and Outdoor CFD Analysis
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Marija Todorovic, Ph.D., P.E., Dubai Electricity and Water Authority |
BPS aimed to minimize final energy loads has been done as a prerequisite to conduct deep energy refurbishment leading to the effective integration of solar energy. Identified moisture penetration in building envelope directed envelope structure to be changed to ventilated façade within refurbishment works (PV glazed second façade as the most appropriate concerning construction works and existing building structure statics). New façade cooling and heating loads and their dynamics for different levels of PV glazing’s transparency and different designs, regimes and uses of ventilation air are studied (encompassing Indoor space comfort, and outdoor air-wind influence CFD and co-simulation analysis).