4.s46
Special Subject: Energy in Buildings — Heating, cooling and ventilation systems for low-carbon buildings

Prerequisites: 
Permission of instructor
Enrollment: 
Qualified students in any UG or G degree program; MArch

Note: beginning the week of 2/19/2018, meeting rooms change to: Monday/5-415, Wednesday/4-146 and Friday/5-415.

Consensus understanding of climate change identifies a need to drastically reduce anthropogenic emissions of greenhouse gases in coming decades, including those associated with buildings. In this course, we seek a thermofluids understanding of the basics of natural and mechanical systems for conditioning high-performance buildings and will develop and assess systems based on this understanding.

We will investigate natural ventilation in detail.  Topics include the thermal and fluid dynamics of airflow in buildings, application to multi-zone wind- and buoyancy-driven airflows, and adjustments in urban areas to account for reduced wind speeds.  Performance assessments will be based on first-principles analyses and simulations that couple airflow and energy analysis programs. Building cooling strategies will be motivated by mapping conventional and innovative cooling systems on the psychrometric chart. First-principles analysis and simulations with an equation-based language, Modelica, and with EnergyPlus will be used to quantify the performance of energy recovery systems, membrane- and desiccant-based dehumidification, evaporative cooling (direct, indirect and dew-point), thermal storage at diurnal (building materials) and annual (ground-coupled heat pumps) scales and radiant cooling and heat-rejection systems.  System design in leading commercial practice will be presented and critiqued.  Through a group project, climate- and building-specific systems will be assessed on the basis of energy consumption, carbon emissions and resilience to climate change.

The class is open to all members of the MIT community.