How Effective Are Peltier Coolers for Freezing Water?

TL;DR

Peltier coolers, like the TEC12703, can effectively reduce water temperature to near zero degrees Celsius without freezing it. In the test, a delta T of 30 degrees was achieved, using 19 watts of cooling power in approximately 14 minutes. Understanding how to read performance curves and specific heat capacities is crucial for accurate temperature control.

Transcript

welcome everyone with this video I'm going to start the test series for freezing the water using five different thirty coolers and in this video I will test the Tec 12700 three unit which is the 3 ampere unit and I have to note here that some beta sheets say that this unit is actually 4 amperes so that might cause some confusion and maybe that's wh... Read More

Key Insights

• 😘 Peltier coolers, like the Tec 12700, can effectively lower temperatures, making them useful for cooling applications.
• ❓ Understanding the performance curves and specifications of temperature devices is crucial for conducting accurate experiments.
• 🤽 Conduction and convection play significant roles in temperature changes, especially in systems with various materials like aluminum and water.
• 😎 Accurate measurements and calculations provide insights into the efficiency and functionality of cooling systems.
• 🛀 The experiment illustrates the applicability of basic physics in practical scenarios, showing how theoretical calculations align with experimental results.
• 🛩️ Small-scale experiments can yield significant learning opportunities in thermodynamics and energy transfer principles.
• 😎 Monitoring temperature at multiple points enhances accuracy in determining the effectiveness of cooling processes.

Questions & Answers

Q: What is the main objective of the experiment?

The primary goal of the experiment is to use a Peltier cooler to lower the temperature of water to zero degrees Celsius without it turning into solid ice. The experiment aims to document the cooling process and assess its efficiency, utilizing detailed calculations and temperature readings for validation.

Q: Why is it significant to reach a delta T of 30 degrees?

Achieving a delta T of 30 degrees is essential because it confirms the Peltier cooler's effectiveness at transferring heat. This delta T establishes the difference between the hot side and cold side of the cooler and reflects the cooler's capacity to lower the temperature of the water, showcasing its performance in a controlled setting.

Q: How did you measure the temperature during the experiment?

The experiment employed multiple thermometers. One thermometer measured the top surface temperature of the water, another monitored the temperature inside the aluminum tank, and a third tracked the outlet temperature of the cooler. These measurements allowed for an accurate overview of the cooling process and the temperatures at various locations.

Q: What were the energy requirements calculated for the cooling process?

The calculations indicated that the Peltier device could provide roughly 19 watts per hour while needing around 4.14 watt-hours to bring both the water and aluminum to zero degrees Celsius. This understanding allowed for determining the time needed to achieve the desired temperature, which was estimated to be around 13-14 minutes based on energy comparisons.

Summary & Key Takeaways

• The video presents a test series utilizing a Peltier cooler to achieve a temperature drop in water, aiming to reach zero degrees Celsius without solidifying it.

• The experiment involves monitoring various temperature readings while calculating the energy needed to cool 100 grams of water and 87 grams of aluminum to the desired temperature.

• Results show that the Peltier device successfully creates a delta T of 30 degrees over a timeframe, demonstrating practical physics calculations and comparisons with measured values.