A wide list of heaters used to maintain a given temperature in a room includes a group of liquid fuel heating devices that differ in the type of fuel used and, accordingly, in design. The names of such heaters come from the name of the fuel used:
- diesel heater;
- kerosene heating device;
- oil heating unit.
These devices (except for oil-fired units), due to their compactness, affordable cost, low fuel consumption and its relatively low price, are a good alternative to gas heating, which requires gasification of a building or room, and therefore are popular.
These heaters are designed to heat rooms of a large area in which there is no gas supply, the power of electricity consumed is limited, or significant heating costs are not appropriate.
Consider a family of diesel heaters, consisting of varieties that differ in design.
Types of diesel heaters
Heating devices operating on diesel fuel, according to the method of heat transfer, are divided into:
- infrared heaters — emitting, like all objects heated above a temperature of 60 degrees, radiant heat — electromagnetic waves in the length range of 0.5-350 microns;
- heat transfer by such devices by convection and contact with surrounding objects (for example, the floor) is also present, but its share in the total heat transfer is disproportionately small — up to 8%;
- air heat guns:
- direct heating;
- indirect heating;
transferring heat through a directed jet of air heated by a burner.
Infrared diesel heater cabinets
Heating devices of this design, depending on the power, are designed to heat spacious (up to several hundred square meters) rooms and maintain the air temperature in them around 25 degrees.
Important! The absence of thermal insulation of walls in such rooms is not an insurmountable obstacle — the power of diesel-fueled devices is sufficient to ensure satisfactory conditions in such rooms even in severe frost.
The device of the cabinet-heater for diesel fuel
The cabinet-heater is equipped with at least two wheels for ease of movement and therefore can be easily installed in the required place. In the lower, closed part of the cabinet there is a burner, in the upper part there is a coil pipe slightly tapering upwards, which acts as a heat exchanger and a chimney at the same time, behind which a mirror reflector is installed.
The curved shape of the pipe is due to an increase in the area of \u200b\u200bthe surface radiated heat, but a chimney of this shape also has a concomitant drawback — the passage of smoke along the bends of the channel is difficult, therefore, a fan is provided in the heater cabinets to force the smoke out of the coil.
Important! The design of the heating cabinet combustion system is equipped with a catalyst, which increases the efficiency of fuel combustion to a value that ensures the absence of the smell of unburned diesel fuel in the surrounding space — depending on the perfection of the device, up to 99%.
The control system is located on the front or side panel and can be either touch or push-button. The heaters have several modes of operation with the ability to automatically set the required temperature, as well as the duration of heating by timer. Modern models are equipped with a remote control function from a portable remote control and even a smartphone.
Characteristics of the cabinet-heater on the solarium
The thermal power of diesel cabinet heaters can be from several thousand to several tens of thousands of kilocalories per hour. At the same time, the consumption of diesel fuel, depending on the model and power, varies from several hundred milliliters per hour to several liters. The power consumption of the device is 50 — 150 watts.
The noise level of cabinet heaters usually does not exceed 50 dB.
The average price of an infrared heater-cabinet running on diesel fuel is 50 thousand rubles, which is justified by its durability and efficiency of use.
Air heat guns
The second type of diesel-fueled heaters are air heat guns — devices for forced heating and directed air jet blowing, which is the heat carrier.
Air heat gun device — a fuel tank is installed on the trolley with a burner device on top, which heats up a ceramic or metal heating element mounted in the “gun” to a certain temperature. When the heat exchanger reaches the set temperature, an electric fan is switched on, driving cold room air through this heating element.
The jet of hot air can be directed by turning the heater to a specific object or to a distant corner of the room to reduce the concomitant effect of raising dust. This method of heating is similar to convection, when warm air rises after contact with the heat exchanger, but in the air gun the flow rate from the fan is several times higher than the convective one, and any direction can be set to the jet.
Air heat guns are distinguished by reliability, rapid heating of the room and efficiency. The capacity of the fuel tank is measured in tens of liters, the weight of the heaters is several tens of kilograms (depending on power), the hot air capacity is from several hundred to several thousand cubic meters per hour, fuel consumption is 0.5 — 5.0 kg / h.
Modern models are equipped with an electronic flame stabilization system and a thermostat that protects the device from overheating. A diesel-fuelled heat gun is capable of heating a room of several hundred square meters in a matter of minutes, working almost silently, after which it will turn off until the next heating cycle.
By design, air heat guns are divided into direct and indirect heating devices, which differ in ease of use and, accordingly, in price.
Heat guns of direct heating
The design of such heaters is relatively simple, so the price of direct heating guns is lower. The burner flame in these heaters is not isolated from the heated air, and the combustion products of the fuel are thrown into the room. Modern direct heating heaters are equipped with fuel filters and devices that increase fuel combustion to almost 100%, and yet units of this design are inferior in operating comfort to indirect heating heat guns.
To have a more complete picture of the design of a direct heating heat gun, a conditional diagram of the design of such a heater will help, where the cold air inlet is indicated in blue, and the hot air outlet in red.
The design of direct heating guns also determines their use — as a heater in rooms with a temporary presence of a person: garage, workshop, warehouse (not food), etc.
Heat guns of indirect heating
In diesel heaters of this type, the operation of the burner is isolated — the heat exchanger is heated by it from the inside, and the combustion products of the fuel are removed through the chimney system (chimney) to the outside. And the cold air, when moving from the fan, comes into contact with the hot heat exchanger body from the outside, without mixing with combustion products, which eliminates their negative impact on the composition of the air in the room and makes the operation of the unit comfortable. Therefore, heat guns of indirect heating can be used in residential buildings and premises as the main means of heating.
The conditional scheme of the indirect heat gun device looks like this:
Advantages and disadvantages of diesel heaters
Diesel heaters, regardless of type, have many common advantages that do not need a detailed description — just list them:
- strength, reliability and simplicity of design;
- mobility of units;
- high speed of achieving the effect;
- ease of operation and daily care;
- large range of power models;
- high automation of control;
- the ability to select a device for specific operating conditions;
- high degree of autonomy;
- the possibility of repairing many nodes with your own hands.
The disadvantages of these heaters are much less, but they still exist:
- raising dust into the air with a jet from a fan;
- the need for regular periodic ventilation of the room (oxygen burnout during burner operation);
- high cost of indirect heaters;
- the presence in the air of combustion products from the operation of cheaper units — direct heating guns.
Any modern heating device, regardless of design, requires compliance with safety regulations, as it uses one or another type of fuel and is a source of not only heat, but also by-products of its work.
Important! To avoid accidents and premature equipment failure, the following safety precautions must be observed when operating diesel-fueled heaters:
- The heater must be grounded.
- The use of fuels other than those specified in the operating instructions on diesel heaters is prohibited.
- It is forbidden to place heaters near flammable objects, to direct infrared radiation or a jet of hot air at them.
- The use of heaters without supervision, leaving them turned on for the care of children or at night is not allowed.
- Preventive inspections and replacement of consumable components (filters, gaskets, etc.) must be carried out in a timely manner.
In order for a diesel-fueled heater to justify the cost of purchasing it, when buying, it is necessary to measure its power and design characteristics with the actual heating needs of the room for which it is purchased, since buying an insufficiently powerful or overly productive unit is fraught with unjustified expenses.