Vapour-compression cycle and GPS (satellite navigation): what they have in common

1. Step 1. Vapour-compression cycle — is used in — Heat pump. The same cycle as in a refrigerator.
2. Step 2. Heat pump — is used in — Energy-efficient house. Heating.
3. Step 3. Energy-efficient house — uses — Solar panel. Solar energy.
4. Step 4. Solar panel — is part of — Artificial satellite. Powering satellites.
5. Step 5. Artificial satellite — is part of — GPS (satellite navigation). A constellation of satellites.

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