How big is the air conditioner in an 80 person classroom? Several? How is it calculated ? 10

80 people, according to the square meter of each person's occupied area, the classroom area is about 45 50 square meters. According to the unit load of 250W m2, 1 set of 5 hp or 2 sets of 3 hp ceiling machine.

Believe me, it's 200w per square.

Tell me the size of your classroom and figure out how much cooling you need for air conditioning.

1p=2400w cooling capacity.

Think about it yourself, try to take into account the number of people and choose a cooling capacity greater than the total demand.

8 hp ** air conditioner with 6 square centimeters of copper core wire is OK.

1. The safe ampacity of the general copper wire is determined according to the maximum temperature, cooling conditions and laying conditions of the allowable core. Generally, the safe current carrying capacity of copper wire is 5 8a mm2, and the safe current carrying capacity of aluminum wire is 3 5a mm2. "Key points" such as:

Recommended value for safe ampacity of 4 mm2 bvv copper wire 4 mm2 recommended value for safe ampacity of copper wire 4 8A mm2=32A.

2. Calculate the recommended value of the safe ampacity of the copper conductor using the copper conductor 5 8A mm2, and calculate the upper and lower ranges of the selected copper conductor cross-sectional area S: s=< i (5 8)>= i i(mm2) s--- copper conductor cross-sectional area (mm2) i--- load current (a).

3. Power calculation: General loads (which can also become electrical appliances, such as lights, refrigerators, etc.) are divided into two types, one is resistive load and the other is inductive load. Formula for resistive load: p=ui Formula for fluorescent load:

p = uicos, where the power factor cos = of the fluorescent lamp load. The power factor of different inductive loads is different, and the power factor cos can be taken when the household appliances are calculated in a unified manner.

The total input power (rated) of the air conditioner is 8*736=5888w, and the maximum current is i=p u=5888 220=,.

5. According to the calculation requirements, it is enough to configure 8 horsepower air conditioner 4mm2 copper core wire, if you take into account the auxiliary heating, it is mainly 6mm2 copper core wire. There is also a margin, which has a protective effect on the line system.

8 hp refrigeration capacity, voltage 380V, power cord is generally 5 * square or 5 * 4 square can be, all manufacturers are the same.

For 80 square meters of classrooms, 6-10 horsepower air conditioners should be installed according to the sealing and insulation conditions of the classroom and the number of people. If the sealing and insulation conditions are good and the number of people is small, two three-horse air conditioners can be installed, and if the sealing and insulation conditions are poor and there are many people, it is best to install two four-horse or five-horse air conditioners, so as to ensure that the refrigeration effect of the air conditioner is good. The first-level energy efficiency ratio of the air conditioner with a high energy efficiency ratio, ** is higher, but the most energy-saving, the energy efficiency ratio of the five-level air conditioner ** is the lowest, but the most electricity-intensive, the school air conditioner has a long working time, it is recommended to buy a first-class energy efficiency ratio of the air conditioner.

The installation of air conditioners depends on the area, but if a new fan is installed, it should be calculated based on the proportion of area and number of people.

How much does it cost to install an air conditioner depends on your local economic situation and the size of your air conditioner.

Generally, the single installation of the hang-up air conditioner is around 100 yuan.

Nowadays, some newly bought air conditioners do not require installation fees, which are included in the purchase of new air conditioners.

Cabinet air conditioners are slightly more expensive, and the installation cost of two-horse cabinet air conditioners is generally about 150 to 200 yuan.

For more information, please contact us.

A three-skin air conditioner is about 7,000 yuan, and your classroom is installed by two units at most.

It's not like you can install it if you want to, and we've thought about it, but what else is the problem of the circuit, but in addition to this, there is also the principal. Teacher: If these difficulties are eliminated, then buy an air conditioner for about 1,000 yuan.

Schools charge indiscriminately. Complaints can be made.

You need to know the minimum temperature in winter to calculate how much air conditioning to use. Only after calculating the air conditioner can we know what power supply to equip. Now the power supply of the air conditioner is more than 3 horses, and it is directly connected to a separate switch.

There are 2 power supply modes for 3 HP air conditioner power supply, single-phase and 3-phase, and the 3-phase power supply also needs neutral wire and ground wire. The 5 hp air conditioner is a 3-phase power supply, plus a neutral wire and a wire, and a 5-wire supply. The line diversion area of 6 square meters is sufficient, but it depends on the length of the distance, and the distance and the main distribution box more than 50 meters will produce a voltage drop, which can be appropriately thickened.

If you heat in winter, the lowest temperature reaches minus 30 degrees, the air conditioner is useless, and the electricity bill cannot be afforded. At least 6 kWh per hour of full load operation, and a minimum of 30 kWh a day, each yuan is 15 yuan. Look at your specific address and ambient temperature to be sure.

1. The air conditioner is a motor product, and the motor product has a starting current, and the starting current can reach 3 times of the peak current. Therefore, the rated current of the air conditioner socket is larger, generally 16 amps, 20 amps, 25 amps, 32 amps, etc. And ordinary sockets are generally 10 amps.

2. The opening distance of the plug of the air conditioning socket is different from that of the ordinary socket. The thickness of the ordinary insert is 30 filaments. The thickness of the blade of the air conditioner socket is 60 wires.

3. Generally, a 16-ampere socket can be used for 2 and a half horsepower air conditioners; 20 amps for 3 hp air conditioning; 25 amps for more than 3 hp air conditioner; 32 amps for air conditioners of 5 hp or more.

A three-phase does have some uneven temperature distribution, two points of single-phase feel desirable, one before and after the classroom, and the three-phase power supply is not good to take and have to re-route, the classroom generally will not have three-phase electricity, I don't know how big your single-phase air conditioner is, 1p is enough, two is 2 horses, 6 lines are enough, air open 25a can be, but to buy a good one, such as Zhengtai can be, DZ47-25, the number of 3-phase horses is also too large, next to the air conditioner can not stand it, single-phase full-frequency operation is fine.

The teacher is generally a cabinet machine, the same as the socket, but it is 16A, and it is generally clearly marked on the diagonal, HVAC or circuit diagram.

If only tables and chairs are placed in the classroom and a lectern is set up, then it can be calculated according to the cooling capacity of 350w square, and if each table and chair is equipped with a computer, it will be calculated according to 380w square.

Generally, the size of the air conditioner can be determined according to the size of the room area and sealing and thermal insulation conditions, floors, orientation, height and other factors, and the refrigeration is calculated according to the cooling capacity of 130 180w per square meter, and the heating capacity is calculated according to 150 200w, and the cooling capacity is 2500w for a horse.

One horse air-conditioner is used in a room of about 12 square meters.

If it is an office or public common sense, the cooling capacity of air conditioning should be appropriately increased, and the cooling capacity of general offices is 250 300w per square meter, and public places are calculated according to 300 400w.

After various tests, it has been proved that the cooling capacity of an air conditioner is about 2500W, and the area it is suitable for is about 12 square meters; The cooling capacity of two horsepower air conditioners is about 5000w, and the cooling capacity of two horsepower air conditioners is about 5000w in a room of about 25 square meters; The cooling capacity of the air conditioner is about 6250W, which is suitable for use in an area of about 40 square meters; The cooling capacity of 3 HP air conditioner is about 7500W, and the area is about 50 square meters. The cooling capacity of the 4 HP air conditioner is larger, about 10000W, which is suitable for a large room of about 70 square meters.

Air conditioners are marked with cooling capacity, such as 1p air conditioner, the cooling capacity is 2300w, the usable area can be calculated in this way: 23 2= 23*2 3 16 The usable area is between the air conditioner, such as the horse, the cooling capacity is 3200w, 32 2=16, 32*2 3, 22, the usable area is between 16---22.

Cooling capacity (remove the following 00 with an integer) divided by 2 is the minimum usable area, and the cooling capacity multiplied by 2 and divided by 3 is the maximum usable area.

You can choose according to the cooling capacity of about 200 watts per square meter.

Depending on the occasion you are using, different places such as bedrooms, living rooms, restaurants, etc., need different cooling capacity per square meter of area! **Large amount, more heat sources, then need a large capacity of air conditioning, if it is a general occasion, you can refer to guodalong97 |Level 12.

Air conditioners are marked with cooling capacity, such as 1p air conditioner, the cooling capacity is 2300w, the usable area can be calculated in this way: 23 2= 23*2 3 16 The usable area is between the air conditioner, such as the horse, the cooling capacity is 3200w, 32 2=16, 32*2 3, 22, the usable area is between 16---22.

Cooling capacity (remove the 00 at the end of the whole number) divided by 2 is the minimum usable area, and the cooling capacity multiplied by 2 and divided by 3 is the maximum usable area!

The cooling capacity required per square meter of the average family is 120W---150W, and if it is the top floor or the west, the cooling capacity required per square meter needs to be increased accordingly.

The Chinese computer room is 290 350W m2 [250 300kcal h m2] in a single-storey building

The machine room is 175 290 W m2 [150 250 kcal h m2] in a multi-storey building

In the vast majority of computer rooms (the heat generation of the equipment is general), in the case that the heat generation of the equipment in the computer room cannot be accurate, the design can be directly carried out in accordance with the standard of 290 350W m2, which is equivalent to 250 300kcal h m2) when selecting precision air conditioners, and for the sake of safety, in most cases, it is designed according to the standard of 300kcal h m2).

The simple way is 140w*room square meter area, for example: 20 square meters * 140 is equal to 2800wChoose the smallest air conditioner.

Approximate algorithm:

Area x400-450 (according to the equipment in the computer room) 860 = cooling capacity 150x400 860 = 70, not less than 70 can consider the margin, you can replace 400 with 450

In the case that the heat generated by the equipment in the computer room cannot be accurately calculated, the design can be directly carried out according to the standard of 290 350W m2, which is equivalent to 250 300kcal h m2) when selecting the precision air conditioner, and in most cases, it is designed according to the standard of 300kcal h m2) for the sake of safety.

The simple way is 140w*room square meter area, for example: 20 square meters * 140 is equal to 2800wChoose the smallest air conditioner.

Cooling capacity refers to the total amount of heat removed from a confined space, room or area per unit time when the air conditioner is running for refrigeration. Air conditioners with large cooling capacity are suitable for rooms with a relatively large area and fast cooling speed. Taking a living area of 15 square meters as an example, it is more appropriate to use an air conditioner with a rated cooling capacity of about 2500W.

The unit of cooling capacity of civil air conditioner is "horse", 1 horsepower = 2324w; The cooling capacity of the air conditioner used in the computer room is generally relatively large, and the unit is "kW".

The principle of choosing the cooling capacity is: the cooling capacity of the air conditioner should be slightly greater than the cooling load of the room, and the heat load of the room should take into account the orientation of the room, the insulation of the walls and roof, and the number of people included in the indoor heat source.

I really don't understand, you can count him as a kw If you know the equipment, it's easy, if you want to know the details, you can find me.

If there are not many electric heating wires in the room, 500w m2;

If there are many electric heating equipment, you can basically choose 1000w m2

The area * number of cabinets * is what you call the cooling capacity.

Precision air conditioning does not know what it means, our company's computer server room precision air conditioning is Emerson's, the small room with 5 horses, 24 hours a day refrigeration, there are filters and after a period of time to replace, broken air conditioning is always bad all year round, according to the after-sales people said that our air conditioning is the construction unit contracted to the outside so get a cheap pit for us, generally better Emerson air conditioning in the electronic room, power distribution room is good.

The conversion cooling capacity of household air conditioner 1 hp is 2500w, about 12 15 square meters, if the tropical one is smaller, less than one square meter.

The local meteorological data (meteorological temperature and humidity in each season), the structural form of the computer room (wall type, space size), the number of equipment and heat dissipation, can be calculated by applying the hourly method!

There are many aspects to consider, let's talk about the normal situation: 1. When there are fewer machines in the computer room, you can directly select the air conditioner according to the area, and you can choose the machine with a cooling capacity of about 80kw. 2. When there are more machines in your computer room, you should calculate the heat dissipation of the machines in the computer room, and calculate a part of the margin when there are fewer machines, and choose an air conditioner of about 100kw.

A 150-square-meter computer room is generally designed with two air conditioners.