Thermal power of heating radiators table

The efficiency of your heating radiators is vital when it comes to keeping your house warm during the winter. Selecting the appropriate radiator size and type for every room in your home can be made easier by being aware of the thermal power, or heat output, of each type. By doing this, you can live comfortably without wasting any energy.

The amount of heat a radiator can produce in an hour is known as its thermal power, which is expressed in watts. A room’s necessary thermal power depends on a number of variables, such as its size, the level of insulation, and the local climate. It’s important to choose a radiator with the right thermal power for your needs and the environment in addition to comfort.

The goal of this guide is to give you a thorough table of thermal powers for different kinds of heating radiators. This table will assist you in selecting wisely whether you’re replacing your old heating system or installing a new one. Your home will stay warmer and your heating costs may go down if you choose the correct radiator for your needs.

Comparison of radiators of different types

One of the primary attributes is thermal power, but there are other, equally significant traits. It is incorrect to choose the battery merely based on the necessary heat flow. You must be aware of the circumstances in which each radiator in your home’s heating system produces the designated stream and how long it will last. As a result, it is more accurate to take into account all of the primary technical features of the sectional heater types, specifically:

• aluminum;
• bimetallic;
• cast iron.

The following primary parameters will be compared between the heating radiators, and these comparisons will be crucial in the selection process:

• thermal power;
• permissible working pressure;
• pressure testing (testing);
• spaciousness;
• weight.

Note: We do not consider the coolant’s maximum degree of heating because, for all battery types, it is relatively high, making them appropriate for use in residential buildings based on this parameter.

When choosing batteries for various heating systems, it’s crucial to consider the working and test pressure indicators. If the coolant pressure in cottages or country homes seldom rises above 3 bar, then a centralized heat supply can enable it to reach 6 to 15 bar, contingent upon the building’s story count. When first establishing central networks, we should not overlook the water drivers. Because of these factors, it is not advised to include every radiator in these networks; instead, it is best to compare heat transfer while considering the attributes that signify the product’s strength.

When building private homes, the volume and weight of the heating components are crucial factors to consider. Calculating the total volume of water in the system and assessing the thermal energy flow rate for heating will be made easier with an understanding of the radiator’s capacity. When choosing how to fasten a device to an outer wall made of porous material (aerated concrete) or with frame technology, it is crucial to consider its weight.

To acquaint you with the primary technical features, we have included the parameters of the MS-140 cast-iron batteries and the data of the renowned radiator manufacturer, Rifar Company, in the table.

Comparative conclusions

Bimetallic heaters are the most efficient in terms of power consumption, as demonstrated by the comparison of heat transfer between heating radiators above. Remember that the coolant duct is housed inside an aluminum ureburn case that is supported by a sturdy frame made of metal welds. This kind of heater is appropriate for installation in private cottages as well as high-rise building heating networks in every way. The price is their only downside.

Slightly less than aluminum radiators’ heat transfer, despite being lighter and less expensive than bimetallic radiators. Aluminum devices can also be installed in buildings of any height, subject to testing and working pressure; however, this is contingent upon the following: the existence of a separate boiler room with a water treatment unit. The truth is that inferior coolant found in central networks exposes the aluminum alloy to electrochemical corrosion. The best way to install aluminum radiators is in separate systems.

A cast iron radiator is not like any other. whose large mass and container capacity result in significantly less heat transfer. Given this comparison, it would appear that they have no use in the current generation of heating systems. However, the classic "accordions" of the MS-140 are still in demand because of their primary advantages—durability and corrosion resistance. While the coolant can be used in any way, the gray cast iron used to make the MS-140 is durable for at least 50 years.

Furthermore, the mass and volume of a typical cast-iron battery contribute to its high thermal inertia. This implies that the radiator stays warm for a considerable amount of time after the boiler is turned off. Regarding operating pressure, cast iron heaters are not able to claim great strength. It’s risky to purchase them for networks with high water pressure.

Calculation of thermal power

In order to plan the heating of the space, you must first determine how much power each one requires, and then you must compute the radiator’s heat transfer. The amount of heat required to heat the space is calculated in a very straightforward manner. The heating value for heating one cubic meter of space is determined by location; it is 35 W/m3 for the building’s south side and 40 W/m3 for its north side. We multiply this number by the actual volume of the room to obtain the necessary power.

Be aware that the provided method for determining the necessary power is expanded, and that its findings should only be used as a reference.

To compute aluminum or bimetallic batteries, you must expand upon the attributes listed in the manufacturer’s instructions. There is the power of one radiator section at DT = 70, as required by the standards. This indicates that one section will provide the desired heat flow at a coolant temperature of 105 oC at the supply and 70 oC in the return. In this instance, the internal environment’s estimated temperature is 18 oC.

Our table shows that, at a temperature of 105 º in the supply pipeline, one section of the bimetallic radiator with an intended size of 500 mm has a heat transfer of 204 watts. Such a high temperature does not exist in modern systems, particularly standalone ones, and the power supplied will drop. You must first use the following formula to determine the DT parameter for the current conditions in order to determine the actual heat stream:

In this case, Dt = (t under + tobr) / 2 – tkom

• ton – water temperature in the supply pipeline;
• Tobr – the same, in the return;
• tkomn – temperature inside the room.

Next, the heating radiator’s passport heat transfer is multiplied by the correction factor determined by the table based on the value of DT:

For instance, the DT parameter will be equal to (80 + 60) / 2 – 21 = 49 in the case of a coolant graph with 80 / 60 ºΡ and a room temperature of 21 ºΡ. The correction factor will be 0.63. The same bimetallic radiator’s heat flow section 1 will therefore be 204 x 0.63 = 128.5 W. This outcome determines how many sections are chosen.

Thermal power is a crucial factor to take into account when choosing heating radiators for your house because it dictates how well they will heat your area. Homeowners can match the size of their rooms with the right heating capacity needed to maintain a comfortable temperature by using a thermal power table for radiators. By giving precise information on the heat output required for spaces of different sizes, guaranteeing energy efficiency, and avoiding the common problem of under- or overheating a room, this table makes the process of selecting the ideal radiator easier. Gaining knowledge of this data will enable you to make well-informed decisions regarding your heating system, which will ultimately result in a more cozy and energy-efficient house.

Conclusion

Bimetallic batteries were at altitude in the heat transfer comparison, as was to be expected, and aluminum radiators left them close to them as well. It is only recommended to use cast-iron heaters under specific operating circumstances.

Comparison of heating heating radiators

The debate over the actual heat transfer of different kinds of heating radiators is still going strong on a number of websites and discussion boards. Arguments are framed around which of them is the best in this indicator, which ultimately influences users’ selection of specific heating devices. As a result, it makes sense to evaluate the actual heat transfer of various radiator types by comparing their thermal powers. What is written in the information that has been brought to your notice.

How to correctly calculate the real heat transfer of batteries

A technical passport, which the manufacturer attaches to the product, is where you must always begin. You will undoubtedly find the relevant information in it, which is the thermal power of a single section or panel radiator of a specific standard size. However, don’t jump to the conclusion that the excellent bimetallic or aluminum battery indicators shown in the passport are final and need to be adjusted; to do so, the heat transfer must be calculated.

Such opinions are frequently heard, such as "Aluminum radiators have the highest power because copper and aluminum have the best heat transfer of any metal." It is true that aluminum and copper have the best thermal conductivity, but there are numerous other factors that affect heat transfer that will be covered later.

When the average coolant temperature (t feed + t Refunctions)/2 differs from the room temperature by 70 °C, the heat transfer specified in the heating device’s passport is accurate. The formula allows for the following expression to be made:

As a point of reference. This parameter may be written as DT, ΔT, or DT in product documentation from various companies, or it may just be written as "with temperatures 70 ° C."

What does it mean when the bimetallic radiator’s documentation states that one section’s thermal power is 200 W at DT = 70 °C? The same formula will assist you in calculating it; all you have to do is enter the known room temperature of 22 °C and perform the calculation in reverse order:

Given that the supply and reverse pipelines’ temperature differences shouldn’t exceed 20 °C, the following method must be used to calculate their values:

Now it is clear that 1 section of the bimetallic radiator from the example will give 200 W heat, provided that in the supply pipeline there will be water, heated to 102 ° C, and the room will be set a comfortable temperature of 22 ° C. It is unrealistic to fulfill the first condition, since in modern boilers heating is limited by the limit of 80 ° C, which means that the battery will never be able to give the declared 200 W. And a rare case that the coolant in a private house is warmed up to such an extent, the usual maximum is 70 ° C, which corresponds to DT = 38-40 ° C.

The calculation procedure

It turns out that the heating battery’s actual power is substantially less than what was stated in the passport, but you still need to know how much in order to choose one. There is a straightforward solution for this: apply a lowering coefficient to the heater’s initial heat power value. The coefficient values that, depending on the size of DT, must be multiplied by the radiator’s passport heat transfer are listed in the table below:

The following is the calculation algorithm for this heat transfer of heating devices under your specific conditions:

1. Determine what the temperature in the house and water should be in the system.
2. Substitute these values into the formula and calculate your real δt.
3. Find the corresponding coefficient in the table.
4. Multiple the passport value of the heat transfer of the radiator by him.
5. Calculate the number of heating devices necessary for heating the room.

In the aforementioned example, the bimetal radiator’s thermal power 1 section will be 200 W x 0.48 = 96 W. As a result, 1,000 will be required to heat a room that is 10 m³. Heat-related weight, or 1000/96 = 10.4 = 11 sections (rounding always goes in the direction of the larger value).

When the documentation states that Δt equals 70 ° C, the battery heat transfer computation and table must be used. However, it occasionally occurs that the radiator power for various devices from certain companies is provided at δt = 50 ° C. Then, using this method is not feasible; instead, obtaining the necessary number of sections based on the passport’s characteristics is simpler and requires only taking their number with a 1.5 margin.

As a point of reference. A lot of manufacturers list the heat transfer values under the following circumstances: δt = 50 °C when t feed = 90 °C, t Refunctions = 70 °C, and t air = 20 °C.

Thermal power comparison

If you closely read the previous section, you should realize that the air and coolant temperatures have a significant impact on heat transfer and are largely independent of the radiator itself. However, there is still a third factor: the product’s surface area of heat transfer, where the product’s shape and design are crucial. Because of this, it is challenging to compare a steel panel heater and cast iron exactly because of how dissimilar their surfaces are.

The material used to construct the heating device is the fourth factor influencing heat transfer. Examine yourself in comparison: At DT = 50 ° C, five sections of the Global Vox aluminum radiator, each measuring 600 mm in height, will produce 635 W. Under identical conditions (ΔT = 50 ° C), the cast-iron retro battery Diana (Guratec) with the same height and number of sections will only be able to provide 530 W. These details are available on the manufacturers’ official websites.

Note: It is absurd to compare the properties of aluminum and bimetallic products because they are nearly indistinguishable in terms of thermal power.

You can attempt to compare the closest size that fits the dimensions between an aluminum and a steel panel radiator. The steel panel Kermi 600×400 is equivalent to the total length of the five aluminum sections mentioned above, which are Global 600 mm high. It turns out that at ΔT = 50 ° C, even a three-row steel device (type 30) will only produce 572 W. However, keep in mind that the Kermi panels are nearly 160 mm deep, while the Global Vox radiator is only 95 mm deep. In other words, aluminum has a high heat transfer, which is evident in the dimensions.

Batteries of the same capacity but made of different metals will perform differently in the specific heating system of a private home. As a result, the comparison makes sense:

1. Bimetallic and aluminum products are quickly warming up and cool down. Giving more heat over a period of time, they return colder water to the system.
2. Steel panel radiators take a middle position, since heat is not so intensively. But they are cheaper and easier to install.
3. The most inert and expensive are the heaters of cast iron, they have a long warm-up and cooling, which is why a small delay appears with automatic regulation of the flow rate of the coolant by thermal-cutting heads.

From everything mentioned above, a straightforward conclusion is evident. It doesn’t really matter what kind of material the radiator is made of; what matters is that it is power-selected correctly and fits the user perfectly. For comparison, it generally won’t hurt to become familiar with all the subtleties of how a specific device operates and where it can be installed.

Comparison on other characteristics

As was already mentioned, inertia is one aspect of how batteries function. However, a thorough comparison of heating radiators needs to account for additional crucial factors in addition to heat transfer:

• worker and maximum pressure;
• the amount of water accepted water;
• mass.

Installing a heating device in multi-story buildings where the water column can reach hundreds of meters in height is contingent upon the operating pressure restriction. It should be noted that private residences are exempt from this restriction because their network pressure is naturally low. An estimate of the total volume of water in the system that will need to be heated can be obtained by comparing the radiator capacities. Well, the product’s mass plays a significant role in deciding where and how to fasten it.

A comparison table of the features of several heating radiators of the same size is displayed below as an example:

Note: A heating device consisting of five sections is used in the table for each unit, with the exception of steel, which has a single panel.

Conclusion

Heat transfer and other features continue to hold aluminum radiators firmly in place even when we compare a larger range of manufacturers. Since bimetallic ones are only better depending on the working pressure, their higher cost isn’t always justified. While cast-iron batteries are for enthusiasts, steel batteries are more affordable. Retro radiators are the priciest of all currently available if the Soviet cast-iron "accordions" MS140 are excluded.

Power of heating radiators

Selecting the right radiators is crucial when running a heating system because their quantity and specifications need to work together to create an even and ideal temperature. As a result, the radiator’s power should be estimated beforehand using the appropriate technique.

If you are aware of the dimensions of the chosen batteries, the area of the premises, and a few other indicators, you can perform the computation on your own. Consequently, you are unable to contact specialists for this process.

The nuances of the creation of the system

The heating system ought to be designed to provide quick and even heating. An apartment or home has batteries installed in every room; the quantity and power of these batteries must be determined.

Heat loss should be balanced by the room’s actual temperature. There is one straightforward calculation method that can be identified, which states that a radiator with a power of one kW must be installed in an area measuring 10 square meters. In actuality, though, it is preferable to install structures with a narrow margin and, ideally, raise the resultant value by 15%. For personal use, this approximation of the efficiency is thought to be ideal. Although the power output is typically a little bit higher than what is needed, you can be confident in the dependability and caliber of the heating.

Experts employ more intricate and precise techniques to calculate heating, which can even calculate the device’s power per square meter.

Features of the acquisition of radiators

It is imperative that you review the technical specifications of the batteries you purchase. which can be found in the supporting documentation. Here are some of their other traits and efficiency. Among them are:

• Power. which can be indicated in the flow of water or other type of coolant, or can be presented in the form of watts.
• The dimensions of the battery. which can be completely different. Height usually varies from 200 to 600 mm. Small products are usually created from steel, but high are most often cast iron or made of modern and unique materials. You need to focus on the distance that is between the floor and the window of the room.
• Pressure. for which the device is intended. Each heating system has its own pressure. It can be low -temperature, medium -trampressed or high -temperature. Typically, the documentation for the products indicates thermal return, and it can be represented, for example, in this form 55/45. In this case, the battery can be used if the coolant passing through it will have a temperature of 55 degrees, and it is cooled to 45 degrees.

How to calculate radiators

A special formula is used to calculate how many batteries should be purchased and what their power should be. This is how she appears:

Q represents the product’s power, k is the radiator’s heat transfer coefficient, and m is the coolant’s temperature pressure. These values are displayed in the KV format.

Given the remaining indicators, you can deduce any meaning from this formula. This leads to the determination of the batteries’ efficiency and quantity, which are required, based on the room’s area and other factors, to heat that particular space.

An illustration of how to identify indicators:

For instance, it’s crucial to figure out how much merchandise you’ll need to purchase for a 15 kV. meter area. The following steps are taken in order to achieve this: 1.5 * 1.15 = 1.725 kW. Subsequently, you must visit an appropriate retailer to select the best radiators. Their size is something you should consider as it should fit in a particular space. Furthermore, the products’ power needs to be considered.

In the event that the pressure in the current heating system is assumed to be 35 degrees, and the product passport indicates that k*a = 31.75 watts per 1 degree, then q = 35*31.75 = 1111.75 watts. This indicator is less than the previously determined value of 1.725 for a particular room. Installing this device alone in a 15 kV meter room will result in uneven and insufficient heating. One possible way out of this predicament is:

• buy more radiators, for example 2;
• Add a few sections to the existing product;
• Select another battery.

Type of Radiator	Thermal Power (Watts)
Cast Iron	100-160
Steel Panel	300-1500
Aluminum	80-200
Electric	500-2000

It is essential to comprehend the thermal power of heating radiators if you want to keep your house cozy and energy-efficient. With the aid of this table, homeowners can select the ideal radiator size and capacity based on the size of their rooms and their heating requirements. An optimally sized radiator guarantees that it operates without straining or underperforming, which can result in a more balanced interior climate and possibly reduced energy expenses.

You can choose a model that best suits the unique heating needs of each room by contrasting various models and their heat outputs. The information in this table can help you design a new space or renovate an existing one by helping you make decisions that maximize energy efficiency and improve comfort. Achieving a balance between functionality and power is key to keeping your home toasty during the winter without wasting a lot of energy.

Ultimately, putting this knowledge to use in your daily life not only enhances the thermal comfort of your house but also helps preserve the environment. Selecting radiators that suit your needs well helps you cut down on wasteful energy use and move toward a more sustainable future. Recall that the ideal radiator uses the least amount of energy while still providing adequate heat for a space.

Video on the topic

thermal power of heating radiators table Kirov