Reducing Unwanted Energy Transfers

These flashcards summarize key concepts related to reducing unwanted energy transfers, focusing on lubrication and thermal insulation methods.

What is the primary purpose of lubrication in energy systems?

To reduce frictional forces between moving objects.

How do lubricants function to reduce energy loss?

Lubricants, usually liquids, flow easily between surfaces to reduce friction.

What is the effect of thick walls with low thermal conductivity on energy transfer?

They slow the rate of energy transfer, allowing the building to cool more slowly.

What are cavity walls designed to do?

Reduce energy transfer by conduction through an air gap between inner and outer walls.

How does loft insulation help in reducing energy loss?

It reduces energy loss by conduction and helps prevent convection currents.

What is the function of double-glazed windows?

To prevent energy transfer by conduction through an air gap between two sheets of glass.

What role do draught excluders play in energy conservation?

They reduce energy transfers by convection around doors and windows.

What is one way to reduce the rate of energy transfer in a house?

By reducing the temperature difference between the indoors and outdoors.