Liangpi has higher calories. Each 100 grams of cold noodles contains 117 calories. Each 150 grams of cooked noodles contains 1 gram of fat, 7 grams of protein, and 40 grams of carbohydrates. The calories are 180 kcal. Compared with some high-calorie and high-fat foods, It is not a fatty food, but it is particularly satiating.
If the temperature difference between supply and return water is increased from Δt= 30℃ to Δt= 60℃, the circulating water volume can be reduced to 100 m/h. According to the external network pipe diameter DN200, it can be seen from the table that the resistance coefficient along the way is 42Pa/m. Compared with the resistance coefficient when the temperature difference is 30℃, it is: . According to this calculation, the total resistance loss along the pipeline network at this time should be H=. Select a pump based on a flow rate of 100 m/h and a head of 12.5 meters. The pump power is only 5.5KW.
Example of formula:
For example, the design heat load of a heating system is 7MW, and the temperature difference between the primary network supply and return water Δt= 30℃. After calculation, the circulating water volume is 200m/h. The external network pipe diameter is DN200. Looking up the table, we can see that the resistance coefficient along the way is 170Pa/m. According to hydraulic calculation, the total resistance loss along the pipe network is 50m of water column. If the water pump is selected based on this flow rate and lift, the water pump power will be 45KW.
If the temperature difference between supply and return water is increased from Δt= 30℃ to Δt= 60℃, the circulating water volume can be reduced to 100 m/h. According to the external network pipe diameter DN200, it can be seen from the table that the resistance coefficient along the way is 42Pa/m. Compared with the resistance coefficient when the temperature difference is 30℃, it is: . According to this calculation, the total resistance loss along the pipeline network at this time should be H=. Select a pump based on a flow rate of 100 m/h and a head of 12.5 meters. The pump power is only 5.5KW.
Reference for the above content: Baidu Encyclopedia-Calorie Calculation Formula