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How to calculate the terminal cooling load of central air conditioning under the conditions of 1... and chilled water flow rate?
The formula for calculating the terminal cooling load of central air conditioning is: q=1000m * c * (T2-T1). In this formula, q represents the cooling load in watts (W), m is the flow rate of chilled water in kilograms per second (kg/s), and c is the specific heat capacity of chilled water, typically taken as 4.18 kilojoules per kilogram per degree Celsius (kJ/(kg * ℃)). T1 and T2 are the supply and return water temperatures of chilled water, respectively, measured in degrees Celsius (℃). Specifically, this formula can help us calculate the amount of cooling that a central air conditioning system can provide under specific conditions. For example, if we know that the supply and return water temperatures of chilled water are 7 ℃ and 12 ℃ respectively, and the flow rate of chilled water is 0.1 cubic meters per second, we can calculate the cooling load using the above formula. Firstly, I need to convert the flow rate of chilled water from cubic meters per second to kilograms per second. Given that the mass of 1 cubic meter of water is approximately 1000 kilograms, a chilled water flow rate of 0.1 cubic meters per second is equal to 100 kilograms per second. Next, we can substitute the known values into the formula for calculation: q=1000 * 100 * 4.18 * (12-7)=2.09 * 10 ^ 6 W. After calculation, it can be concluded that the cooling load at the end of the central air conditioning system is 2.09 megawatts (MW). This value can help us grasp the cooling capacity of the system under specific conditions, providing a basis for equipment selection, operation management, and maintenance. It is wo
2. Simple calculation of water flow rate in air conditioning water system
The simple calculation method for water flow rate in air conditioning water system is as follows:
1. Calculation of cooling water flow rate The calculation of cooling water flow rate is usually based on the cooling capacity of the refrigeration unit and considers a certain safety factor.
. The specific calculation formula is as follows: L (m3/h)=[Q (kW)/(4.5~5) ℃ × 1.163] × (1.15~1.2) Q (kW): the cooling capacity of the refrigeration host4.5~5 ℃: represents the temperature difference between the inlet and outlet of the cooling water, usually calculated within this range. 1.163: The product of physical parameters such as density and specific heat capacity of water, used for unit conversion. (1.15~1.2): To ensure sufficient cooling water flow for safety reasons. In practical applications, the cooling water flow rate can be directly selected based on the values provided by the product sample, or calcul
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