Andrews and Jelley, Energy Science 4e Student Resources

Quiz Content

not completed
1) In what period of time does the Earth receive as much energy from the Sun as is consumed globally in one year?

not completed
2) The percentage of the world's energy consumption in buildings from space heating or cooling and heating water is approximately…

not completed
3) Which is the more efficient solar thermal collector?

not completed
4) Selective emitters are used in solar thermal applications to ______.
Please select all that apply.

not completed
5) The radiative power absorbed by a receiver at a temperature T is that concentrated on to it, less the amount _____ ______ which depends on T⁴.

not completed
6) An air-source heat pump powered by electricity with a carbon intensity of 0.4 kg CO2 per kWh is available as an alternative to gas heating. Which one of the following would be more efficient?

not completed
7) Which is the correct expression for the coefficient of performance of an ideal heat pump, where the internal temperature is T2 and the external one is T1?

not completed
8) GSHP stands for _____ _____ _____ .

not completed
9) What statements about concentrated solar thermal power (CSP) are true? Please select all that apply.

not completed
10) Which of the following statements about concentrated solar power (CSP) are correct? Please select all that apply.

not completed
11) Match the conversion efficiencies to the technologies.

11a.

~3.5%

not completed
11b.

~10%

not completed
11c.

~2%

not completed
11d.

~20%

not completed
12) The dependence of the volume flow rate Q through a porous rock of cross-sectional area A and thickness L on the pressure drop Δp and viscosity of the water μ is of the form…

not completed
13) Where would you expect to find geothermal power plants?
Please select all that apply.

not completed
14) What is the thermal energy stored in 2 km3 of granite at a temperature of 250 °C? The density and specific heat of granite are 2700 kg m3 and 790 J kg1 °C1, respectively.

not completed
15) What statements apply to enhanced geothermal systems?
Please select all that apply.

not completed
16) Heat diffuses a distance of ~ (kt)1/2 in a time t, where k is the thermal diffusivity of rock ~ 10-6 m2 s-1. Over what distance will heat diffuse in 4 years?

not completed
17) The global geothermal power resource is estimated to be…

not completed
18) Match the accessible potential by 2050 to the technologies.

18a.

3000 TWh y-1

not completed
18b.

4000 TWh y-1

not completed
18c.

2000 TWh y-1

not completed
18d.

1800 TWh y-1