1. Announcement Course Exam October 6 th (Thursday) In class: 90 minutes long Examples are posted on the course website

2. Lecture Objectives: Answer questions related the Project 1 and the Final Project Continue with Photo Voltaic (PV) and hot water systems Discuss HW3 Learn about the impact of HVAC system on energy consumption - overview HVAC systems

3. Requirement for the project Undergrad students: Team project (2 or 3 members) Grad students: Individual effort Email me (till next Friday): Final project group members Project title One paragraph (200-300 words) including - Project objective -Methodology -Expected results Any schematic drawing is welcome

4. HW3 Design of zero energy house Install a PV system on your house from your project 1-a http://www.nrel.gov/gis/images/eere_pv/national_photovoltaic_2012-01.jpg http://rredc.nrel.gov/solar/old_data/nsrdb/1961-1990/redbook/atlas/

5. PV system Silicon crystal base Tin film

6. Hot Water Solar

7. eQUEST HVAC Models Predefined configuration (no change) Divided according to the cooling and heating sources Details in e quest help file: For example: DX CoilsNo Heating –Packaged Single Zone DX (no heating) Packaged single zone air conditioner with no heating capacity, typically with ductwork. –Split System Single Zone DX (no heating) Central single zone air conditioner with no heating, typically with ductwork. System has indoor fan and cooling coil and remote compressor/condensing unit. –Packaged Terminal AC (no heating) Packaged terminal air conditioning unit with no heating and no ductwork. Unit may be window or through-wall mounted. –Packaged VAV (no heating) DX CoilsFurnace Packaged direct expansion cooling system with no heating capacity. System includes a variable volume, single duct fan/distribution system serving multiple zones each with it's own thermostatic control. –Packaged Single Zone DX with Furnace Central packaged single zone air conditioner with combustion furnace, typically with ductwork. –Split System Single Zone DX with Furnace Central single zone air conditioner with combustion furnace, typically with ductwork. System has indoor fan and cooling coil and remote compressor/condensing unit. –Packaged Multizone with Furnace Packaged direct expansion cooling system with combustion furnace. System includes a constant volume fan/distribution system serving multiple zones, each with its own thermostat. Warm and cold air are mixed for each zone to meet thermostat control requirements.

8. Building HVAC Systems (Primary and Secondary Building Systems) AHU Building envelope Cooling (chiller) (or Gas) Electricity Gas Heating (boilers) Fresh air For ventilation Distribution systems Air transport Secondary systems Primary systems AHU – Air Handling Unit HVAC systems affect the energy efficiency of the building as much as the building envelope

9. Integration of HVAC and building physics models Building Heating/Cooling System Plant Building Heating/Cooling System Plant Load System Plant model Integrated models Q buiolding Q including Ventilation and Dehumidification

10. Example of System Models: Schematic of simple air handling unit (AHU) m - mass flow rate [kg/s], T – temperature [C], w [kg moist /kg dry air ], r - recirculation rate [-], Q energy/time [W] Mixing box