I would like to ask about the method for calculating calories
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Our facility uses 240 tons of water for bathing purposes every day; the temperature of this water is 5 degrees Celsius, and it is heated to 65 degrees Celsius through a heat exchanger. There is a current 2.1MW hot water boiler; can this boiler meet the requirements?
A 3t hot water boiler to heat 240t/d of bathing water through circulating water should be sufficient
This post was last edited by Little Chemical Engineer on April 26, 2017, at 16:53. It’s a very simple calculation: For 240 tons of water to be heated from 5°C to 65°C, the required amount of heat is: 240,000 * 60 * 1 = 14,400,000 kcal. Note that this volume of water represents 240 tons per day; thus, this is the total amount of heat needed per day. The boiler’s capacity is now 2.1 MW, which is equivalent to 1,800,000 kcal/hr; note that the unit here is hours. What needs to be considered is how long the bath water will be used for, what the maximum amount of water used over that period is, and then comparing that with the boiler’s power. However, in terms of order of magnitude, the boiler is relatively small.
Q = CMT × 4.2 KJ/(KG·K) × 240000 KG × (65–5) K = 60480000 KJ = 16800 KW = 16.8 MW. This amount is far from sufficient to meet the total heat requirement. It’s just my personal opinion; please feel free to correct me if I’m wrong.
The fact that the unit uses 240 tons of water for bathing per day – does this refer to the total amount of mixed water, or the amount of hot water? ? ? ? What is the coefficient of simultaneous use for the unit? In other words, what is the number of people using it at the same time? What is the period during which such concentrated use occurs? What is the design operating condition of your 2.1MW hot water boiler – is it 60–110, or 80–130? It’s necessary to carry out the relevant calculations; you can’t just make a simple conversion of the heat units as some people upstairs did. Check Lu Yaoqing’s heating manual for more information.
Based on the heat output, it can supply up to 30 tons of hot water that meets the standards per hour. 1,800,000/(1000*60*1)=30