1 kcal/hour =1.163 w.

1 us refrigeration ton =3024 kcal/hour = 3.5 17 kw.

1 day cold ton =3320 kcal/hour = 3.86 1 kw.

Celsius = (32 degrees Fahrenheit) 5/9

(Note: 1 cold ton is the refrigerating capacity required to make 1 ton of water at 0℃ turn into ice at 0℃ within 24 hours. )

1P=2.5KW=735.5W: Note: 2.5KW corresponds to cooling capacity and 735.5W corresponds to electric power.

◎ First of all, we must make clear the unit of heat, which is also a kind of energy. In the world, the unit of work and energy is Joule, which is equivalent to a force of Newton (N), and its point of action moves a distance of one meter in the direction of the force. The symbol of Joule is J, and the legal unit of heat in China is J..

At standard atmospheric pressure, when 1g water is heated or cooled, its temperature rises or falls 1 degree, and the heat added or released is called 1 calorie, which is expressed by cal. In engineering, heat is often expressed as 1000 times that of a card, which is called kilocalorie or kcal.

At standard atmospheric pressure, water with 11b (lb) (11b = 0.454kg) is heated or cooled. When its temperature rises or falls1Fahrenheit, the added or taken heat is called British thermal unit, and the symbol is Btu.

The commonly used conversion formula is:

1kJ (kilojoule) = 0.239 kilocalorie (kilocalorie)

1 kcal =4. 19kJ (kj)

1kcal=3.969Btu

1btu = 0.252kcal.

1kcal=427kg.m

1kw=860kcal/h

1 us refrigeration ton = 3024 kcal/hour =3.5 1kw

1 Japan cold ton = 3320kcal/h = 3.86kW

For example, a 40kw air conditioner has a cooling capacity of 40 * 860 = 34,400 kcal.

Civil air conditioners like to take p as the unit, 1P=0.735kw, the general compression ratio is 3.2, and the refrigeration capacity is 2352w, which is about 2022 kcal when converted into kcal. It can be said that the cooling capacity of 1P air conditioner is 2000 kcal.

Load calculation:

Daily cooling tonnage = building area * load per square meter /3860

American cold tonnage = building area * load per square meter /35 10

Day horse = building area * load per square meter /2800

Wet bulb temperature of cooling tower.

This cooling tower can reduce its nominal water volume to its nominal temperature at this dry and wet bulb temperature, usually from 37 degrees to 32 degrees. If the local dry and wet bulb temperatures are not this number, the same temperature and precipitation will be corrected.

Dry bulb temperature is the temperature you see with a thermometer.

The wet bulb temperature can be understood as the temperature when the heat and humidity balance is reached (theoretically, the temperature of air and water is equal at this time).

◎ 1. 1 (HP)=2500W Strictly speaking, it is 2499W, which is stipulated by the Japanese and calculated according to EER.

This horse is completely different from ordinary horsepower, but this horse is calculated with that horsepower.

1 horsepower =735W, and the definition of horse is the power that can be generated by inputting 1 horsepower.

There is something wrong with the coefficient. The coefficient stipulated by the Japanese is 3.4 (the Japanese say this 3.4 is the most appropriate).

Minimum energy efficiency ratio EER)

So 1 horse =735*3.4=2499W.

2.kj and degrees are energy units, others are unit of power.

The expression of degree is KWH, which means how much electricity your light bulb consumes. You should remember to pay the electricity bill.

1KWH=3600kj

Your most common energy units are calories and kilocalories (cal and kcal).

1cal=4. 1868j (this is the most common one, which is found in junior high school textbooks).

3. Cold tons are generally expressed by RT, but they are divided into three categories: American cold tons, Japanese cold tons and British cold tons.

The most commonly used thing we usually say is the American refrigeration ton, which is expressed by us. RT, and US is the abbreviation of America.

1US。 RT=35 16.7W

Those two refrigeration tons in China and Britain are relatively large, more than 3,800, while those in Japan are relatively small.

4. The people in the kcal design institute like to say kcal best, and some manufacturers, such as Daikin, are the units indicated by the numbers on the machine nameplate.

It's calories, and we usually see W. For example, KFR-25GW/Y 25 means that the unit of 2500 is W.

Kcal is Kcal/h, Kcal was originally a unit of energy, but divided by time is a unit of power.

1 kcal/h( 1 kcal/h)= 1. 163 w。

5.BTU/h, This is an English unit, which is rarely used in China.

1BTU/h=0.293W, so this unit is very small.

The cooling capacity of an air conditioner can be nominally measured by the number of passengers (PH) or cold tons (RT). A passenger is an energy unit. If it is to be converted into refrigeration capacity, it needs to be multiplied by the refrigeration coefficient ε = 2.8 ~ 5, and the calculation basis is KCAL/H or watts (W). Generally speaking, the refrigeration capacity of 1 household air conditioner is about 2000 kcal = the refrigeration coefficient of central air conditioner is between 4 and 5.

Definition of British frozen tons:

* British Btu, that is, 1 pound (1Lb) of water. The heat required to raise the water temperature to 1 Fahrenheit is1btu = 252cal =1055.06j. ..

* 1 British Freezing Ton (1RT) is 1 ton (2,000 pounds) the heat that needs to be absorbed when water at 32 degrees Fahrenheit freezes into ice at 32 degrees Fahrenheit within 24 hours (the melting heat of ice is 144Btu/Lb).

* 1 British frozen tons (1rt) =144btu/lb * 2000/24hr =12000btu/hr = 3024kcal/h = 3517w.

Definition of metric tons of frozen tons:

* The heating unit is kcal, and the heat required to raise the temperature of 1 kg of water to 1 Celsius is 1 kcal.

* metric tons of frozen tons (1RT) is the heat that1000 kg (1t) water with 0 degrees Celsius (the melting heat of ice is 79.63Kcal) needs to absorb to become ice with 0 degrees Celsius within 24 hours.

* 1 metric ton of frozen tons (1rt) = 79.63kcal/kg *1000/24hr = 3318kcal/hr = 3859w.

For a horse, this unit originally refers to the work of one horsepower, and the refrigeration power refers to the refrigeration energy of one horsepower. Even in Japan, the cooling capacity of a horse is different. As Viagra said, the efficiency ratio coefficient stipulated by the Japanese is generally around 3.4, which varies from manufacturer to manufacturer. The cooling capacity of the same number of machines ranges from 2300 to 2800 W, and it is generally ideal to calculate by 2500W W..