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120 MW geothermal power plant, Iceland . RETScreen ®. Power Projects. Photo credit : Gretar Ívarsson, Nesjavellir. Central grid (continent). Overview of Power Projects. Isolated grid (community). Photo credit : Northwest Territories Power Corp. Off-grid (single home).

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120 MW geothermal power plant, Iceland


Power Projects

Photo credit: Gretar Ívarsson, Nesjavellir

overview of power projects

Central grid (continent)

Overview of Power Projects

Isolated grid (community)

Photo credit: Northwest Territories Power Corp

Off-grid (single home)

Photo credit: RER Renewable Energy Research

Photo credit: RER Renewable Energy Research


Renewable Technologies

  • Wind turbines
  • Hydroelectric
  • Geothermal power
  • Solar photovoltaics
  • Solar thermal power
  • Ocean current power
  • Tidal power
  • Wave power

On-grid PV, Bavaria, Germany

Photo credit: RER Renewable Energy Research

technologies continued
Technologies (continued)

Conventional Combustion Technologies

  • Steam turbine
  • Gas turbine
  • Gas turbine - Combined cycle
  • Reciprocating engine

Other technologies

  • Fuel cells
  • Microturbines
power system operation
Power System Operation

Gas turbine example

  • Fuel input
  • Combustion
  • Turbine
  • Generator
  • Waste heat stream


  • Heat rate: the amount of energy input (in kJ or Btu) from the fuel required to produce 1 kWh of electricity
  • Heat recovery efficiency: the fraction of the remaining energy input from fuel that can be used as heat
types of fuels
Types of Fuels

Combustible Fuels

  • Fossil fuels: coal, diesel, natural gas, propane, oil, etc.
  • Biomass: bio-diesel, ethanol, bagasse, wood, bark, coconut fibre, straw, hemp, peat, willow, switch grass, etc.
  • Waste: tires, landfill gas, food waste, forest residue, coffee refuse, Christmas trees, poultry litter, packaging waste, etc.
  • Hydrogen

Renewable Energy “Fuels”

  • Sunshine, wind, waves, tides, geothermal, water, etc.
power projects with retscreen
Power Projects with RETScreen


  • Base case load and power system characteristics (for off-grid systems and internal loads)
  • Proposed case power system characteristics (energy + costs)
  • Operating strategy
  • Summary (energy)
  • Emission analysis
  • Financial analysis (including sensitivity and risk analysis)
types of analyses
Types of Analyses

Project Types:

  • Power
    • Choose technology (steam turbine, geothermal, photovoltaic, wind, etc.)
  • Power-Multiple Technologies
  • Other project types:
    • Heating & Power
    • Cooling & Power
    • Heating, Cooling & Power
    • Project types unrelated to power
grid type
Grid Type

For small power system technolgies

operating strategy
Operating Strategy
  • Full power capacity
  • Power load following
  • Heating load following
project example 1 grid projects

1.3 MW Lean-Burn Engine

Power plant in Bergen, Norway

Project Example 1: Grid Projects

Landfill gas fuelled power

plant using a lean-burn engine

  • Bergen, Norway
  • 1.3 MW
  • US$ 0.03/kWh
  • 37% efficiency

Photo credit: CADDET Centre for Renewable Energy

Photo credit: CADDET Centre for Renewable Energy

project example 2 off grid

Village PV System, Syria

Project Example 2: Off-grid

3.6 kW Photovoltaic Power System

  • 6 households
  • Syrian Arab Republic
  • Peak load 2.4 kW
  • Average daily load 8.4 kWh
  • Installed cost of PV: US$ 6,500 per kWp for array plus US$ 17,000 forother equipment and installation
  • Competing genset: US$ 1,000 but consumes 13,400 L of diesel per year

Photo credit: Binu Parthan, IT Power India Ltd.