How is the heat dissipation of a radiator calculated?

If you want to use a heater for heating, you must go to the market and buy a good radiator.

The amount of radiator will directly determine the heating effect, so this matter is a very important thing, then, here we can first take a look at what is the heating area of a radiator, after understanding this problem, and then look at the heating principle of the radiator, let's take a look.

The heating area of a radiator.

"w" (watt) is the amount of heating heated, and how much "w" can warm a room is calculated. Central heating sunny side (with insulation layer): 70-80W.

Central heating (with insulation layer) shady, low-rise, top-floor, end households, suburbs, bungalows and other unfavorable factors related to heating, must be appropriately added 20 -30 heat dissipation.

1. In case the heating is not enough in cold weather. According to the purpose of their house, consumers can multiply the area of their house by the above "W" per square meter (the amount of heat required by the room) equal to the total heat dissipation required by the room.

2. The standard heat dissipation refers to the heat dissipation measured by the heating radiator according to the national standard of China (GB T13754 1992) in the closed room according to the specified conditions, and the unit is watts (W). And it stipulates that the heat medium is hot water.

3. The inlet water temperature is 95 degrees Celsius.

The outlet water temperature is 70 degrees Celsius, the average temperature is (95 70) 2 degrees Celsius, the room temperature is 18 degrees Celsius, and the calculated temperature difference t degrees Celsius 18 degrees Celsius Celsius, which is the main technical parameter of the radiator. The heat dissipation amount marked by the radiator manufacturer at the time of delivery or sale generally refers to the standard heat dissipation.

The heating principle of the radiator.

1. There are usually two kinds of heating: water heating and air heating, and the general radiator refers to water heating, which is the use of wall-hung boilers.

Or the boiler heats the circulating water, and then links to the radiator through the pipe, and finally outputs the appropriate temperature through the radiator to form the indoor temperature difference, and finally carries out thermal circulation to make the whole indoor temperature rise uniformly.

2. The air heating is to heat the air, the cold air is heated into hot air by the radiator as soon as it comes in, the hot air rises and forms a convection with the cold air in the house, and the cold air circulates to the vicinity of the heating to be heated into hot air, and the hot air circulates in the house, and the room is warm.

3. If you do not know much about radiator heating, installation and other issues, please consult customer service when preparing to install radiators, and then purchase.

From the introduction of this article, we mainly looked at what is the heating area of a radiator, the above has written the relevant answers to you, if we want to buy radiators, you can first look at the area given in the article, and then estimate how many groups of radiators you need in your home.

Calculate the area first, and calculate the area of the bedroom, living room, bathroom, kitchen, etc.; Secondly, count the number of tile plates. The general family dwelling right can be calculated at 45 70 (w) per square metre. When buying a radiator, multiply the area of the room with different orientations and orientations by the amount of heat dissipated per square meter to determine the amount of heat dissipation required for the room.

Room area Watts per square meter = heat supply required for that room. The area calculated by the radiator heating area calculation method: the area of each bedroom, living room, bathroom, kitchen, etc. is calculated separately and used as the basic data for further calculation.

Wattage (w) of the calculation method of radiator heating area: This process is relatively complex, and the following is a brief summary of the reference data for the calculation of the heating target per unit area of a group of civil buildings provided to consumers. Usually a family dwelling can be calculated at 45 70w per square meter.

When purchasing heating, the number of watts per square meter of the living area = the amount of heat required by the room.

Usually, the heating is marked with W. Because there are big differences in practical life, when budgeting, we should think about high-rise buildings or bungalows, top or ground floors, ends or centers, north or south houses, urban or suburban areas, wall insulation and other factors. There is a simple method, after calculating the number of radiators, you can adjust it, when adding 10 to 20%, as a solid amount, to avoid insufficient heating heat.

Precautions: 1. Try to maintain a certain amount of heat dissipation space near the radiator in the room, and do not pile up sundries on or in front of the radiator, otherwise it will affect the heat dissipation effect of the radiator.

2. The installation position of the radiator is reasonably designed by the designer, and the location is conducive to indoor heating and can ensure the emptiness in a relatively balanced manner. Convection and room temperature, if it is changed, may cause an imbalance in the indoor temperature. In addition, once the pipes and radiators are moved, it is easy to cause leakage, which not only causes economic losses, but also may damage health.

3. When the heating system is running for the first time, it needs to be tested, specific to each valve, to exclude the air collected in the radiator, or to test the exhaust valve of the gas collection tank installed at the top of the system, until each radiator is warmed up, even if the debugging is basically completed, once the debugging is completed, the valve should be fixed and cannot be artificially opened and closed at will.

Heat dissipation is an important technical parameter of a radiator, and each type of heat sink is marked with a standard heat dissipation amount (i.e. heat dissipation at t=) at the factory. However, the heat medium conditions provided by the project are different, so we must calculate the temperature difference t according to the heat medium conditions provided by the project, such as the inlet water temperature, the outlet water temperature and the indoor temperature, and then calculate the heat dissipation according to various different temperature differences, The calculation formula of t: t = (inlet water temperature + outlet water temperature) 2 - indoor temperature.

Several simple calculation methods are introduced: (1) Calculated according to the relationship between the heat dissipation and the calculated temperature difference in the thermal inspection report of the radiator. In the thermal inspection report, a calculation formula q=m* tn, m and n have been determined in the inspection report, t can be calculated according to the technical parameters given by the project, for example:

The thermal calculation formula (ten columns) of copper-aluminum composite 74*60 is: q= (ten columns) 1....

Let's first have a general understanding of what is "radiator heat dissipation": relative to radiators, the heat dissipation is expressed by the formula Q=, where Q represents the radiator heat dissipation, K represents the radiator heat transfer coefficient, F represents the radiator heat dissipation area, and T refers to the radiator standard heat transfer temperature.

There is a standard for the calculation of radiators. The standard heat transfer temperature value is obtained according to the national standard working conditions: tin (inlet water temperature) = 95, tout (outlet water temperature) = 70, tromm (room temperature) = 18, temperature difference t=1 2 (tin + tout)-troom=.

Of course, the above values are relative, the amount of heating heat dissipation should also consider the area of the room, orientation, floor, temperature requirements, radiator placement and other factors, the calculation of heat dissipation is best to be a professional HVAC master to the actual measurement and design at home, choose a large brand of radiator to use rest assured.

Currently works radiators.

Mainly steel engineering radiators and copper-aluminum composite engineering radiators, copper-aluminum composite engineering radiators are higher than steel engineering radiators, but a piece of engineering radiators of the same standard copper-aluminum composite heating area is about 2 square meters, steel engineering radiators can only meet the square meters of dry matching. No town means that before buying engineering radiators, you can prepare various sizes and areas of your house, so that the business can help calculate the amount and determine the amount according to the amount**.

Now the new type of radiators are marked with heat dissipation, central heating users can be calculated according to the need for 45 70w heat per square meter, and the household independent heating family house needs 100 120w heat per square meter to calculate, the amount of engineering radiators required (number of pieces), after calculating the size of the engineering radiator, can be appropriately added 10 20%, as a rich amount, so as not to lack heating heat.

Dear, hello, I am happy to answer for you The radiator is calculated in this way, and the heating area is calculated first, and the area of the living room, bedroom, kitchen and bathroom is calculated; Then calculate the wattage, and the average family is calculated by 45-70w per square meter; Finally, the data is put into the calculation formula, which is that the heat supply of the room is equal to the area of the room. In addition, factors such as the floor height, wall insulation and orientation of the building should also be taken into account when calculating. There are three ways to count the number of radiators:

One counts the number of pieces, the second counts the area, and the third counts the wattage (W). How to calculate the heating area of the radiator - count the number of pieces: There is a simple way, after calculating the number of radiators, think about the correction of the radiators, and then add 20-50% appropriately, as the amount of heat transfer in the neighborhood, to avoid the number of radiators.

In practice, after the wattage is calculated, you can convert the number of pieces of the radiator and then calculate the number of groups, the practice of radiators is not all can be split and combined, especially the bathroom radiator, usually the majority of the whole shape, and the consumer can choose its applicable style according to the area. How to calculate the heating area of the radiator - calculate the area: calculate the area of the bedroom, living room, bathroom, kitchen, etc., respectively, and use it as the fundamental data of the side town for further measurement.

How to calculate the heating area of the radiator - calculate the wattage (w): This process is relatively complex, and the following is a brief summary of the reference data for the calculation of the thermal target per unit area of a civil building. Usually, the family residence can be calculated at 45-70w per square meter, which varies depending on the orientation and orientation.

When purchasing radiators, multiply the area of the room with different orientations and orientations by each square meter"w"This is the amount of heat that the room needs. Usually, the radiators of ** are marked"w"In the budget, we should think about the elements such as high-rise or square, top or ground floor, end or center, north or south room, city or suburbs, and wall insulation.

For living rooms and bedrooms, the number of radiators needs to be calculated according to the size of the room. First of all, choose a cost-effective radiator and remember the amount of heat dissipation of each piece;

Divide this heat dissipation by 100 to get the number of pieces needed per square meter, and then divide the room area by the number of pieces needed per square meter to get the total number of pieces needed for this room.

For example: the living room area is 20 square meters, select the radiator with a height of 1800 in Rubens Cézanne Great Waterway, the heat dissipation of each piece is 260W, the algorithm is: divide the heat dissipation with 260W divided by 100 equals the number of pieces needed per square meter), the room area is 20 divided by equals, so a 20-square-meter room needs a group of 8 radiators.

There is a gap in the middle of the radiator, which is the kind of crack that can be seen on the back wall, and if there is a seam, it is separated.

Just set the heating quota directly.

The question asked is not clear, what is the radiator to be counted?

Like the 60-piece head 700 of the steel radiator we commonly use, its heat dissipation area is the heat dissipation of each piece, that is to say, each piece can drive the heating of square meters, if your bedroom is 20 square meters, then you can install a group of 14 or 15 pieces in the bedroom! If you install it in this way, you will get the best heat dissipation effect of the product!

There is also a small back basket radiator in our bathroom, such as the 50 plug-in back basket that has been particularly popular recently, 800 * 450 makes us commonly used, its heat dissipation is, like this, we don't need to calculate! Because now the heat dissipation of the whole group is given, so there is no need to do calculations, because of the shape of the product, some of them are calculated by group, like the radiators we usually use are calculated by piece! So we also need to distinguish between groups and slices!

q=a(tw-to)f, q is the amount of heat dissipated in w.

tw is the surface temperature of the heat dissipation surface.

to is the trembling ambient temperature.

f is the area of the heat dissipation surface, m 2.

a is the comprehensive heat transfer coefficient, w (m 2).

where a is determined according to the shape of the surface (e.g., the cylinder is different from the plane), the characteristics (e.g., the horizontal plane is different from the vertical plane), and the size of (tw-to), as well as the magnitude of the fluid velocity. Generally, it can be found or calculated in materials such as "Heat Transfer Science" and "Industrial Furnace Design Manual".

The heat emitted by the water heating radiator is calculated in w as a unit, and the amount of heat dissipation required per square meter is different according to different room locations. So, how to calculate the heat dissipation of water heating radiators? Let's follow the golden flagship flag brother to find out.

Considering the installation and heating characteristics of heating equipment, the industry suggests that users use modern new types of plumbing radiators, and when installing floor heating, the pipes need to be laid under the ground, requiring the destruction of the ground and refilling, this way is very damaging to the house, and seriously affects people's normal life, and the installation of plumbing radiators is very simple, the plumbing radiators do not need to destroy the ground, the wall, the operation time is very short, and all the construction tasks can be completed in 2-3 days, which will not affect people's home life, This is an important reason why plumbing radiators have become the first choice for secondary decoration of homes.

The reason why the plumbing radiator is welcomed by most families, in addition to the simple installation, is also in the heating effect is good, the decoration is strong, some plumbing radiators also have storage and other functions, the plumbing radiator can be described as the warm guard of the family, it has a large amount of heat dissipation, rapid heating, that is, it is hot, and the user can enjoy a comfortable heating environment without waiting. The bathroom also has a special water heating radiator, which can be used as a towel rack, not only to heat and decorate the environment, but also to store things and make the room look clean and tidy.

In the HVAC market, most of the plumbing radiators are sold by the piece, generally three pieces, which is considered from the actual needs of the user, how many pieces of the user's home needs to be purchased, the plumbing radiator heating, the heat emitted by w is used to calculate the unit, according to the location of different rooms per square The amount of heat dissipation required per square meter is different, usually expressed by w square meters, then, how to calculate the heat dissipation of the plumbing radiator.

The user needs to calculate the water heating radiator spring disturbance heat dissipation refers to the actual heat demand of the room, this amount is the basis for the purchase of the number of water heating radiators, a house, bedroom, dining room, kitchen, bathroom and other places of the area is known, can be used as the basic data for testing the heat dissipation, we can calculate the total heat dissipation of the room according to the heating heat index of civil buildings, residential 45-70, office, school 40-80, hospital, kindergarten plumbing radiator 65-80, Single-storey houses 80-105, canteens, restaurants 115-140 (unit: w square meters), consumers can multiply the area of the house by the above data according to the use of the house to get the heat supply required by the room.

However, the value obtained by the above method is a theoretical value, and some influencing factors need to be considered in the actual use process, such as room orientation, warmth, etc., and 10-20% of the rich amount can be appropriately added to prevent the heat from not enough when using the liquid gauge in winter.