ENVI 405 Lecture Notes - Lecture 1: Base Load Power Plant, Anaerobic Digestion, Net Output
- Demand and timing
- Sometimes it's cloudy
- High risk
- You still want a baseload
Drivers of Change
- Need econ or there will not be a product
- Learning by doing then people get better at doing it
Hydroelectric
conventional and mostly pump storage
When demand or price is low, hydro will buy it and then will make money and electricity at high time
Conventional
- dams and lakes
- can be used to prevent flooding on rivers
- can produce GHG directly due to LUC; Methane
produced by the anaerobic digestion of biomass occurs if forestlands, grasslands, etc. are flooded as
reservoir's fill.
- LC GHG can vary a lot depending on LUC
- social justice issues with flooding of lands
- can obstruct fish spawnings
- Conventional hydroelectric dams generate electricity by releasing stored water passed a turbine. The
turbine motion drives a generator.
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- see diagram 08, 6
Pumped Storage
1. Water is stored in an upper reservoir. During the day, water is released.
2. Water rushes downhill or is pumped uphill through a network of pipes connecting the upper and
lower reservoirs.
3. Power is generated as water rushes through a power station. The released water is stored in the
lower reservoir.
Microhydropower
small-scale; produce enough power for a big home or little farm
Darcy-Weisbach
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Net Head/Hydraulic Head
- hG = gross head = elevation difference between reservoir height and turbine inlet
- hL = local head losses = turns in the pipe, friction, etc
Net head = hG - hL
Power output equation for a dam
P=9.81eQ*hN
P = Power output (kW)
e = Efficiency of the turbine/generator systems (~50%)
Q = Volumetric flow rate (m3 / s)
hN = Net hydraulic head (m)
**keep track of units**
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Need econ or there will not be a product. Learning by doing then people get better at doing it. When demand or price is low, hydro will buy it and then will make money and electricity at high time. Can be used to prevent flooding on rivers. Can produce ghg directly due to luc; methane produced by the anaerobic digestion of biomass occurs if forestlands, grasslands, etc. are flooded as reservoir"s fill. Lc ghg can vary a lot depending on luc. Social justice issues with flooding of lands. Conventional hydroelectric dams generate electricity by releasing stored water passed a turbine. Pumped storage: water is stored in an upper reservoir. During the day, water is released: water rushes downhill or is pumped uphill through a network of pipes connecting the upper and lower reservoirs, power is generated as water rushes through a power station. The released water is stored in the lower reservoir.
