Waste heat recovery systems can be used in energy-efficient design in several ways:
1. Utilizing Industrial Waste Heat: Industries produce a significant amount of waste heat during their processes. This heat can be captured and utilized to generate electricity or provide heating or cooling for other processes within the facility, reducing the need for additional energy sources.
2. Co-generation: Combined Heat and Power (CHP) systems can be employed, where waste heat from power generation is captured and utilized for heating or cooling purposes. This technique maximizes the overall efficiency of the system by using the waste heat instead of venting it to the environment.
3. District Heating/Cooling: Waste heat recovery systems can be integrated into district heating or cooling networks. Heat generated by industries, power plants, or other sources can be captured and supplied to nearby residential and commercial buildings, reducing the consumption of primary energy sources for heating or cooling purposes.
4. Heat Pump Systems: Waste heat recovery can also be employed in heat pump systems. Waste heat is used to heat the refrigerant in the system instead of relying solely on electrical energy. This enhances the overall efficiency of the system and reduces energy consumption.
5. Thermal Storage: Waste heat recovery systems can operate in conjunction with thermal storage systems. Excess heat generated during periods of low demand can be stored and utilized during peak demand periods, optimizing energy use and reducing the reliance on primary energy sources.
6. Waste Heat to Electricity Conversion: Waste heat recovery systems can be used to convert waste heat into electricity. Technologies like Thermoelectric Generators (TEGs) or Organic Rankine Cycle (ORC) systems can be employed to harness the waste heat and convert it into usable electrical power.
Overall, incorporating waste heat recovery systems in energy-efficient design allows for the effective utilization of waste heat, reducing energy consumption, and minimizing environmental impact.
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