Thermal Energy Applications PS7d) understand applications of thermal energy transfer

Learning Objectives: I will… Explain how thermal energy transfer applies to heat engines, thermostats, refrigerators, heat pumps, and geothermal systems. Describe different forms of energy and how energy transfers from one form to another. Language Objectives: I will… Read about thermal energy transfer technology and record notes about each. Use notes and readings to answer questions related to energy and energy transfer.

Thermostat When a room becomes warm, thermal energy in the air transfers to an indicator in the thermostat causing the air to come on Opposite process happens when room temp. is too low

Heat Pump Device that transfers thermal energy from one area to another In summer, it transfers thermal energy from inside a building to outside (same job as air conditioner) In winter, takes thermal energy from outside and moves it inside

Refrigerator Refrigerant, which has a low boiling point, starts as a gas and condenses as it travels through the coils on the back It absorbs thermal energy from the environment The surrounding area is left cold and used to cool food and drinks

Heat Engine Use heat to transform thermal energy into mechanical energy When thermal energy is transferred, the result is motion, such as in a car

Geothermal Systems The energy from inside the earth can be carried by water to the surface naturally or by pipes This water can be used to heat homes and buildings Also used to heat turbines connected to generators to create energy (similar to power plants)