Heat Cool Systems is focused tested to measure real-time BTU Capacity and EER. Really to find a 3 a lot, 13 SEER, Heat Cold System only producing 3 tons and 8 SEER. Extra new installations with this condition.
If the system has finished 12 years old that it will have lost significant capacity to and efficiency.
About 70% of the particular heat and cool alternating current unit capacity is meant to lower the temperature associated with air. The remaining 30% capacity makes it easy to remove humidity or moisture linked to the air. As an example a prolonged 3 ton unit ought to have a total capacity of 12000 btu's each and every ton or 36000 btu's. Of the 36000 btu's, 24000 btu's would lower the temperature of the air and 12000 btu's would remove moisture from the air. In order to be sure total capacity, we should really measure both.
A normal thermometer will look at the air temperature entering the return inside your AC and the temperature of our colder air can be measured at the first supply vent. In addition multiply the difference should you be temperature by 1. 08 btu in every cubic foot of air circulation produced by the Temperatures Cool System, you provide the capacity measure that occurs the temperature. This is through called sensible heat.
Another thermometer called powerful psychrometer or hygrometer is measure the humidity this is exactly removed by the device. A psychrometer is a generic thermometer with a wet cotton sock about the bulb. The temperature reading generally known as wet bulb temperature can be converted to a value indicating the warm and grains of moisture rising. This value is alluded latent heat and enthalpy. You can buy or make a tired bulb thermometer. A very accurate electronic digital hygrometer that measures % relative humidity are offered for around $100. With the enthalpy chart or enthalpy calculator online, you can convert automobile measurements to btu's. It can be vital to measure wet bulb temperature collected from one of tenth of a proportions F.
The more difficult assess to obtain is selection air flow in cubic feet each and every minute (CFM). An instrument called a vane anemometer can be used as can an instrument to maintain static pressure. Instruction videos for measuring air circulation in CFM are offered also on www. youtube. com
The Formula
Calculating total Btu's includes measuring airflow and moist bulb air temperatures in and included with the conditioned space. Total Btu's are calculated using the formula:
Total Btu equals 4. 5 X CFM BY Enthalpy Change
The 4. 5 factor is an acronym for weight of 1 cubic foot/minute (CFM) of standard air per hour.
CFM just might be total supply airflow entering the building from the system.
Enthalpy change is measured eating a hygrometer and converting really the readings to Enthalpy.
Latent foodstuff = Total Heat often Sensible Heat
Notes:
Air and warm can leak into the machine between your temperature readings or the indoor cooling coil. Creditors, your calculation will indicate the cooling fed to the space and none the cooling produced by the product.
You can also judge equipment airflow by sensibly measuring fan static challenges, then plotting the fan CFM of the manufacturer's fan data
An enthalpy change of approximately 6 is normal.
Airflow has a major effect on way performance. It must be measured accurately on the top quality instruments and holidays.
A humidity level of 90% plus inside supply side of shape is common. As mid-air is cooled is holds less moisture.
Normal sensible/latent the proportion is 70/30. A significant return air duct leak from a stinging attic, produce a 55/45 sensible/latent BTU proportion.
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