1.3: Insulation & Payback time

What are the three ways in which heat energy can be transferred?

• Conduction, convection, and radiation

• Insulation, convection, and radiation

• Conduction, insulation, and radiation

• Conduction, convection, and insulation

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NGSS.MS-PS1-4

How does insulating a building make it more energy efficient?

• It reduces heat energy losses to the environment

• It increases heat energy losses to the environment

• It increases energy consumption

• It has no effect on energy efficiency

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NGSS.MS-PS3-3

What is the payback time of an energy-saving solution?

• A measure of how cost-effective it is

• The time it takes to install the solution

• The time it takes to save money

• The time it takes to reduce energy consumption

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NGSS.MS-PS3-3

What is the formula for calculating payback time?

• payback time = installation cost / annual savings

• payback time = installation cost * annual savings

• payback time = installation cost + annual savings

• payback time = installation cost - annual savings

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NGSS.HS-ETS1-3

What is the payback time for double-glazing that costs £3,000 and saves £150 per year in fuel costs?

• 20 years

• 15 years

• 10 years

• 5 years

What is the purpose of installing double glazing or extra insulation in a house?

• To reduce heat energy losses and save money

• To increase heat energy losses and save money

• To increase energy consumption and save money

• To reduce energy consumption and spend money

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NGSS.MS-PS3-3

Put these in the correct order to explain what the benefits of installing insulation is on the environment.

• so less Carbon Dioxide is emitted,

• reducing the greenhouse effect.

• Less fossil fuels are burned,

• Less heat is lost so that less energy is used for heating.

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NGSS.MS-PS3-5

Reorder the following to explain how loft insulation works.

• so the heat cannot pass through by conduction very quickly.

• Also, there are no convection currents,

• Loft insulation traps air in small pockets.

• Air is a poor conductor of heat

• because the air cannot flow.

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NGSS.MS-PS3-3

NGSS.MS-PS1-4

What is the payback time, in years, for double glazing that costs £12,000 to install and saves £300 per year on fuel bills?

Mathematical Equivalence

ON

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NGSS.HS-ESS3-2