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RETScreen ® Heating and Cooling Projects

Water-cooled chiller. RETScreen ® Heating and Cooling Projects. Insulated Pipes for District Heating. Photo : Wikipedia. Photo : Wikipedia. Absorption chiller. Solar water heating, apartment in Uganda. District heating for the city of Copenhagen.

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RETScreen ® Heating and Cooling Projects

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  1. Water-cooled chiller RETScreen® Heating and Cooling Projects Insulated Pipes for District Heating Photo : Wikipedia Photo : Wikipedia

  2. Absorption chiller Solar water heating, apartment in Uganda District heating for the cityof Copenhagen Overview of Heating and Cooling Projects Photo: Sanyo Electric Co. Photo: Solar Construct Ltd. Ground-source heat pump, single-family home Photo: Reynaers/Greenpeace

  3. Heating Technologies • Boiler • Furnace • Thermal fluid heater • Heating with biomass • Heat pump • Waste heat recovery unit • Solar water heater • Solar air heater

  4. Vapour Compression Cooling Free Cooling Cooling Technologies Requiring a source of power: • Heat pump • Compressor Requiring cool weather: • Free cooling

  5. Cooling Technologies (cont.) Requiring a source of heat: • Desiccant • Absorption Absorption Cooling Desiccant Cooling

  6. Coal being transported, Ohio, USA Types of Fuels Heat from: • Fossil Fuels (Coal, Diesel, Natural Gas, Propane, Gasoline, Oil, etc.) • Biomass • Waste (tires, landfill gas, etc.) • Renewable “fuels” like solar and geothermal energy • Electricity Photo : Wikipedia A heating load or dessicant/absorption cooling load can use these fuels directly, or use waste heat from apower project utilizing these fuels

  7. Electric heating Fire-tube boiler HRSG Base, Intermediate, and Peak Load Systems Photo: Air & Water, Inc Photo: FireCAD Technologies Photo: Babcock-Hitachi K.K.

  8. Equipment Sizing • Base load system • Operates at or near capacity most of the time • Supplies majority of heating/cooling • Lowest operational costs • Equipment typically expensive • Peak load system • Operates only during times of peak demand • Supplies small fraction of heating/cooling • May have high operational costs • Equipment generally less expensive • Intermediate load system • Between base and peak load system On the Energy Model sheet:

  9. Heating and Cooling Projects with RETScreen Steps: • Define Loads (Heating, cooling and power) + heating/cooling degree days for space heating/cooling • Base case characteristics + costs (heating, cooling) • Proposed case characteristics + costs (heating, cooling) • Operating Strategy • Summary (energy) • Emission analysis • Financial analysis

  10. Types of Analyses Project Types: • Heating • Cooling • Combined Heatingand Cooling

  11. Heating load Cooling load Load Characteristics Heating and Cooling Loads • Space heating/cooling • Process heating/cooling • Combination space+process • Spatially-distributed loads: • Single building • Single building with multiple zones • Multiple buildings Base case vs Proposed case

  12. Important Parameters Heating System • Seasonal efficiency Cooling System • Coefficient of Performance-seasonal Power system providing waste heat (see CHP course) • Heat rate • Heat recovery efficiency Eff. = 55 % 100 GJ 55 GJ COP = 3.0 100 MWh 300 MWh

  13. Emission & Financial Analysis Method 2 Method 1

  14. Example 1: Heating or Cooling Project database (Case Studies):Heating – Boiler – Canada– Vancouver – Office • Simplified model • Compare medium andhigh efficiency boiler • Compare natural gas and oil Project database (Case Studies):Cooling – Compressor – USA– Madison – Arena • Compare medium and high COP • Compare compressor withabsorption cooling

  15. Example 2: Heating & Cooling Project Type: Cooling ⇒ Combined Heating & Cooling • Load & Network sheet appears • In Energy Model Sheet: Cooling system ⇒ Absorption • Now the fuel source is the heating system • Base Load System ⇒ Base + Intermediate + Peak Load System • Biomass as a low-cost source of heat

  16. Questions? www.RETScreen.net

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