lec11 - MIT OpenCourseWare http:/ocw.mit.edu 1.020 Ecology...

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MIT OpenCourseWare http://ocw.mit.edu 1 .020 Ecology II: Engineering for Sustainability Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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1.020 Ecology II: Engineering for Sustainability Lectures 08_11 Outline: Open System Thermodynamics, Heat Discharge Motivation/Objective Develop a model to determine how heat discharges from a power plant affect temperature in a stream. Approach 1. Define open system (stream reach with mass inflows and outflows). Specify steady-state inflow and outflow rates, time-dependent inflow and outflow temperatures. Identify unknown (stream temperature). 2. Write open system mass (steady-state) and energy balance (rate form) equations. 3. Relate terms in energy balance equation to unknown stream temperature and other inputs 4. Specify inputs, stream properties, etc. solve energy balance eq. for unknown stream temperature (MATLAB) 5. Examine impact of discharge rate, discharge temperature, and upstream flow rate.
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lec11 - MIT OpenCourseWare http:/ocw.mit.edu 1.020 Ecology...

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