Heat Engine Efficiency: How Ice Water Affects Performance

Thread starter WazapMe
Start date Mar 26, 2022
Tags

Efficiency Engine Engine efficiency Heat Heat engine Ice performance Water

In summary, adding ice water to a heat engine can improve its performance by increasing efficiency and creating a larger temperature difference between the hot and cold components. It is important to use cold water close to freezing temperature for optimal results. However, ice water should not be used as a substitute for traditional coolants as it can cause long-term damage to the engine. The amount of ice water added must be carefully balanced for optimal performance, as adding too much can cause the engine to cool down too quickly and adding too little may not have a noticeable effect. While ice water can improve performance, it can also have potential drawbacks such as causing damage to the engine and reduced efficiency over time.

Mar 26, 2022

WazapMe

Thread moved from the technical forums to the schoolwork forums

Consider mixing ice water with the hot water and vice versa so that the two reservoirs are closer to the same temperature. What will happen to the mechanical/thermodynamic efficiency and ideal Carnot efficiency of a heat engine?

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Mar 26, 2022

Mister T

Science Advisor

Gold Member

Is this a homework question? Are you familiar with the expression for the Carnot efficiency of an engine?

1. What is a heat engine?

A heat engine is a device that converts heat energy into mechanical work. It typically consists of a heat source, a working fluid, and a heat sink.

2. How does ice water affect the performance of a heat engine?

Ice water can significantly improve the efficiency of a heat engine. When the heat engine is running, the ice water acts as a heat sink, absorbing excess heat and keeping the temperature of the heat source low. This allows the engine to continue running at a higher efficiency for a longer period of time.

3. Why does ice water improve efficiency?

Ice water has a higher heat capacity than regular water, meaning it can absorb more heat before its temperature rises. This allows the heat engine to maintain a larger temperature difference between the heat source and heat sink, which is a key factor in determining efficiency.

4. Is there an optimal temperature for the ice water?

Yes, there is an optimal temperature for the ice water to maximize the efficiency of the heat engine. This temperature will vary depending on the specific design and operating conditions of the engine, but it is typically around 0°C (32°F).

5. Can other liquids besides water be used in a heat engine?

Yes, other liquids with high heat capacities can also be used in a heat engine to improve efficiency. Some examples include ethylene glycol, propylene glycol, and oils. However, water is often the most readily available and cost-effective option.