GPT on Question 7, Sep 20
Answer in plain prose only. Do not use bullet points, headers, bold text, or lists. Explain how a refrigerator works.A refrigerator moves heat from inside the cabinet to the surrounding room using a circulating refrigerant.
The process begins in the evaporator, a set of coils inside or behind the refrigerated compartment. Liquid refrigerant enters these coils at low pressure and evaporates. Evaporation absorbs heat from the food and air inside, making the compartment colder.
The compressor then draws in the refrigerant vapor and compresses it. Compression raises the refrigerant’s pressure and temperature. This hot, high-pressure vapor flows through the condenser coils, usually located on the back or underneath the refrigerator. Because the refrigerant is hotter than the room, it releases heat into the surrounding air and condenses back into a liquid.
Next, the liquid passes through an expansion valve or narrow capillary tube. Its pressure drops sharply, which lowers its temperature. The cold refrigerant returns to the evaporator, and the cycle repeats.
A thermostat monitors the interior temperature and switches the compressor on and off as needed. Fans may circulate cold air inside and move room air across the condenser. Insulation and tight door seals slow the flow of heat into the refrigerator, helping it stay cold efficiently.
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