- #1
Bhisma Thapa
- 3
- 0
To be more specific, if i have to heat water 300l of water in one hour. What should the power of a heating coil?
How can we calculate the power of a heating element?
Click For Summary
Discussion Overview
The discussion centers around calculating the power required for a heating element to heat 300 liters of water within one hour, specifically for use in a pressurized electrical cooker. Participants explore the necessary parameters, including starting and final temperatures, and considerations regarding heat loss and safety.
Discussion Character
- Technical explanation
- Conceptual clarification
- Debate/contested
- Experimental/applied
Main Points Raised
- Some participants inquire about the starting and final temperatures of the water, questioning whether it needs to be boiled or just heated to a warmer temperature.
- One participant suggests using a calculator to determine the energy and power required to heat the water, noting that energy loss to the surroundings must be considered.
- Another participant emphasizes that power is the rate of energy flow and that the heating element must deliver energy at a rate greater than the heat loss.
- Concerns are raised about safety when using a pressurized electrical cooker, with warnings about the potential dangers of improper use.
- Participants express a need for more details about the application to provide more tailored advice.
Areas of Agreement / Disagreement
Participants generally agree on the importance of understanding the specific heating requirements and safety considerations, but there is no consensus on the exact power calculation or methodology to be used.
Contextual Notes
Participants mention the need for information on insulation and the rate of heating, which may affect the calculations. There are also unresolved concerns regarding safety and the technical background of the original poster.
Who May Find This Useful
Individuals interested in heating systems, particularly those involving water heating in pressurized environments, as well as those concerned with safety in such applications.
- #2
berkeman
Admin
- 69,411
- 24,808
Welcome to the PF.Bhisma Thapa said:
What are the starting and final temperatures? Do you need to boil it, or just heat it to a warmer temperature?
- #3
Bhisma Thapa
- 3
- 0
Starting temp will be at room temperature.I need it for boiling.berkeman said:Welcome to the PF.
What are the starting and final temperatures? Do you need to boil it, or just heat it to a warmer temperature?
- #4
berkeman
Admin
- 69,411
- 24,808
This calculator will help you figure out how much energy and power are required to heat your water from room temperature to just short of boiling:Bhisma Thapa said:
https://bloglocation.com/art/water-heating-calculator-for-time-energy-power
After that, it depends on whether you want to actually boil off the water, or keep it boiling for some period of time. Also, unless your container is perfectly insulated, you will lose some energy to the surroundings...
Can you say more about the application?
- #5
Baluncore
Science Advisor
2025 Award
- 16,812
- 10,442
Power is the rate of energy flow. You must deliver energy at a rate greater than the heat loss by all processes over all temperatures.Bhisma Thapa said:
How quickly do you need to heat the water?
How well insulated is the tank?
- #6
Bhisma Thapa
- 3
- 0
Thanks.berkeman said:
It will be used like a pressurized electrical cooker.
- #7
- 11,326
- 8,755
Bhisma Thapa said:
Be careful and very vigilant about safety. It takes only one mistake to turn a pressure cooker into a bomb able to kill everyone in the room.
- #8
berkeman
Admin
- 69,411
- 24,808
Bhisma Thapa said:
Agreed.anorlunda said:
@Bhisma Thapa -- please send me a private message (click on my avatar and select "Start a Conversation") to explain your technical background and your project in detail. This thread will remain locked until we can figure out the level of danger in your project. Thank you.
Similar threads
- · Replies 15 ·
- · Replies 2 ·
- · Replies 7 ·
- · Replies 6 ·
- · Replies 4 ·