6,000 cubic meters of air per hour, from 110 degrees Celsius to 7–12 degrees Celsius – can this be achieved using water at 7 degrees Celsius as the cooling medium?
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A heat exchanger is needed. Air at 6,000 cubic meters per hour, cooled from 110 degrees Celsius to 7–12 degrees Celsius, with a pressure of 0.85 MPa ； Use seven-degree water as the refrigerant. Let’s see if it’s possible; if so, what will the device be like in terms of size (weight, dimensions)? How much is it roughly? If this cannot be achieved, then 6,000 cubic meters per hour of air flow, with the temperature dropping from 45 degrees to 7–12 degrees, and a pressure of 0.85 MPa ； Use seven-degree water as the refrigerant. Let’s see if it’s possible; if so, what will the device be like in terms of size (weight, dimensions)? How much is it roughly? The shell can be made of carbon steel, while the tubes are made of stainless steel.
Both temperatures can be achieved! ! !
This post was last edited by wiseboy on 2017-9-25 at 11:05. 7°C is clearly impossible; I used BoxHeater to conduct detailed calculations for the heat exchanger at three different outlet temperatures, which were 10, 11, and 12°C respectively, and there’s a significant difference in area. It certainly can be achieved. Additionally: in the case of engineering design, your hot air should specify its moisture content; it is necessary to calculate whether condensation will occur when the temperature drops below 12°C. This is very important. Vivi Software can provide professional calculation reports for design depth. htcsoft@163.com
This requires more specific parameters; it’s best to achieve a temperature reduction of 10°C. If the temperature is 7°C, the required amount is very large. A temperature of 12°C meets your requirements. Additionally, the humidity or relative humidity of the incoming air is important, as condensation of water requires a lot of energy
Theoretically, it’s possible, but since there is no temperature difference between the two sides in your case, it’s actually impossible to do
There is certainly condensate water, but I can’t provide exact figures.
Seventy-degree water is used as the refrigerant; in fact, I can lower the temperature a bit and keep the outlet temperature of the heat exchanger higher. This creates a temperature difference, although it is still very small.
Condensate water is what I need to calculate; you definitely can’t provide that. But you need to provide the initial water vapor content.
Basically, temperature differences within 2 degrees or so are maintained on paper; however, with actual operating conditions such as water quality, instruments, and the environment, even the slightest issue can prevent this from being achieved
a) Atmospheric temperature: Annual average temperature is 7.4°C; highest temperature is 42.2°C; lowest temperature is -41°C. Average temperature in the hottest month is 23.8°C, while it’s -18.1°C in the coldest month. Wet-bulb temperature is 19.8°C.
b) Humidity: Annual average relative humidity is 65%; maximum relative humidity is 83%; minimum relative humidity is 0%.
c) Atmospheric pressure: Annual average atmospheric pressure is 96.83 kPa. The highest annual pressure is 97.06 kPa, and the lowest is 96.55 kPa.
d) Wind: Annual average wind speed is 1.5 m/s. The highest wind speeds and dominant wind direction occur in summer, at 19 m/s with winds coming from a southeasterly direction. In winter, the highest wind speeds and dominant wind direction are 20.3 m/s, with winds coming from a northwesterly direction. The basic wind pressure occurring once every 50 years is 0.5 kN/m2.
e) Precipitation: Annual average precipitation is 210.6 mm. The highest annual precipitation amount is 339.7 mm, while the lowest is 124.9 mm. The highest monthly precipitation amount is 84.1 mm, and the highest daily precipitation amount is 39.2 mm.
f) Evaporation: Annual average evaporation amount is 2073.8 mm. The highest annual evaporation amount is 2633.1 mm, while the lowest is 1039.4 mm. That’s all I can provide.
b) Humidity: Annual average relative humidity is 65%; maximum relative humidity is 83%; minimum relative humidity is 0%.
c) Atmospheric pressure: Annual average atmospheric pressure is 96.83 kPa. The highest annual pressure is 97.06 kPa, and the lowest is 96.55 kPa.
d) Wind: Annual average wind speed is 1.5 m/s. The highest wind speeds and dominant wind direction occur in summer, at 19 m/s with winds coming from a southeasterly direction. In winter, the highest wind speeds and dominant wind direction are 20.3 m/s, with winds coming from a northwesterly direction. The basic wind pressure occurring once every 50 years is 0.5 kN/m2.
e) Precipitation: Annual average precipitation is 210.6 mm. The highest annual precipitation amount is 339.7 mm, while the lowest is 124.9 mm. The highest monthly precipitation amount is 84.1 mm, and the highest daily precipitation amount is 39.2 mm.
f) Evaporation: Annual average evaporation amount is 2073.8 mm. The highest annual evaporation amount is 2633.1 mm, while the lowest is 1039.4 mm. That’s all I can provide.