1. Beneath the Ice, p. 7
Drive, January 2015
Look at the diagram and then complete the sentences below. Choose from:
pumped,
stored,
rises,
turns into,
transported,
lowered,
released (2x),
compressed
1.
Ammonia coolant (NH3) is _________________ in a large container. Ammonia gas is
_________________ into a compressor.
2.
This compresses the gas up to a pressure of 10bar. The temperature of the ammonia gas
___________ to 35°C. The hot, ___________ gas goes into a water-cooled condenser.
3.
In the condenser, the gas _______________ liquid, still under pressure of 10bar, and the
heat is _______________ .
4.
In the expansion valve, the pressure of the liquid is _______________ to 2bar. The
accumulated energy is _________________ , and the liquid cools down to -15°C.
5.
The ammonia loses its coldness and slowly turns into vapour. Then it’s
_________________ back to the ammonia container.
SOLUTIONS
1. Beneath the Ice, p. 7
Drive, January 2015
Look at the diagram and then complete the sentences below. Choose from:
pumped,
stored,
rises,
turns into,
transported,
lowered,
released (2x),
compressed
1.
Ammonia coolant (NH3) is stored in a large container. Ammonia gas is pumped into a
compressor.
2.
This compresses the gas up to a pressure of 10bar. The temperature of the ammonia gas
rises to 35°C. The hot, compressed gas goes into a water-cooled condenser.
3.
In the condenser, the gas turns into liquid, still under pressure of 10bar, and the heat is
released.
4.
In the expansion valve, the pressure of the liquid is lowered to 2bar. The accumulated
energy is released, and the liquid cools down to -15°C.
5.
The ammonia loses its coldness and slowly turns into vapour. Then it’s transported back
to the ammonia container.