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GEOMETRY FACTORS IN COILS
Following are the factors in coils that will enhance or affect the duty of the exchanger. The following are given for some types of fins. FIN TYPOLOGY C...
Thu, Mar 14, 2024 at 8:20 AM
I HAVE INCREASED THE NUMBER OF CIRCUITS, AND THE RESULTING CAPACITY IS DRASTICALLY LOWER. WHY?
In some applications, like in the Cooling modality, increasing or decreasing the number of circuits, even of just one point, can affect drastically the perf...
Wed, Mar 30, 2016 at 4:27 PM
I'M CALCULATING A PROJECT WITH A FAN AND THE PROGRAM SEEMS TO DO A WRONG BALANCE CALCULATION. WHY?
When calculating the pressure drops of a fan it’s important to take in consideration the reference air density as displayed in the fan’s datasheet. Sometime...
Wed, Mar 30, 2016 at 4:28 PM
WHAT HAPPENS TO THE POWER, INCREASING THE SUBCOOLING?
If you increase the Subcooling, the Power decreases. In fact if you increase the Subcooling, the deltaH increases (see the figure below), then the fluid...
Wed, Mar 30, 2016 at 4:28 PM
IF THE INPUT DATA ARE THE SAME AND I CHANGE ONLY THE SUBCOOLING FROM 5K TO 30K, WHY THE POWER DECREASES FROM 28,4 KW TO 22,7 KW?
If you increase the Subcooling, the deltaH increases, then the fluid flow decreases, then the Power decreases from formula Q=W*deltaH with Q=power ...
Wed, Mar 30, 2016 at 4:29 PM
ARE THE PRESSURE DROPS STATIC OR DYNAMIC IN COILS SOFTWARE CALCULATION?
The pressure drops are static.
Wed, Mar 30, 2016 at 4:29 PM
IF I INSERT A FAN AS INPUT DATA IN SUCKING POSITION IN COILS CALCULATION WITH A SPECIFIC PRESSURE DROP FOR A SPECIFIC AIRFLOW (FOR EXAMPLE, 110 PA TO 13908 M3/H ), WHY, AFTER THE CALCULATION, I OBTAIN AS AIR PRESSURE DROP 134 PA?
The pressure drop, that you see in the fan diagram, are only for the fan with an inlet air density of 1,2 kg/m3 (110 Pa), while in the calculation , it is n...
Wed, Mar 30, 2016 at 4:30 PM
IF DURING A CALCULATION, I OBTAIN THIS WARNING (SEE THE SCREENSHOT), WHAT MEANS?
This warning advises that the refrigerant mass velocity is < 180 Kg/m2 s but it is not an error but only a report so you have information about t...
Wed, Mar 30, 2016 at 4:30 PM
HOW TO INSERT A COMPRESSOR WITH COEFFS
STEP 1 - ADD COMPRESSOR To add a compressor please proceed as follow: 1. Select “Compressor” from menu “Archive management” 2. Click o...
Tue, Aug 16, 2016 at 9:27 AM
DETAILS MEANING OF PARAMETERS “GLOBAL EXCHANGE COEFFICIENT” and “DHML”
FIRST SITUATION: In the cooling coils where the air-fluid cools down, the exchanged capacity is said “SENSIBLE CAPACITY” if the water contained in...
Tue, Oct 18, 2016 at 12:39 PM