Analysis of Omailan air source heat pump floor heating and air conditioning dual supply system

For the entire joint supply system of air source heat pump, floor heating and air conditioning, the design of floor heating is the core part of the entire system. The correct design of floor heating is the basic component for determining the later quality, operation effect and temperature control of the entire project. The ideal working condition is that the temperature is accurate to ℃ in summer and to ℃ in winter. Therefore, controlling the temperature in every detail of the project is the key to technology. Because of the technical nature of floor heating, it is necessary to calculate the heating and cooling load and heat dissipation per unit heating area. In addition to the "Heating, Ventilation and Air Conditioning Design Code", the calculation should also be adjusted and corrected based on the following factors. 1. Issues that should be paid attention to when calculating heating load when designing floor heating
The heat load is not calculated on the ground where heating pipes are laid between layers.
Since floor heating heat dissipation is higher than convection heat dissipation, the heating heat load should be calculated as % of the room's conventionally calculated heating load or by lowering the room temperature by ℃.
For residences that use individual household independent heat sources or central heating with household heat metering, factors such as intermittent heating and inter-household heat transfer when adjacent rooms are not heated should be considered, and appropriate correction coefficients should be used to determine the room heat load value. .
2. Issues that should be paid attention to when calculating heat dissipation when designing floor heating
In residential buildings, the impact of factors such as furniture blocking on heat dissipation should be considered.
For vertically adjacent rooms, except for the top floor, each floor should deduct the heat from the upper floor according to the room heating heat load to determine the required heat load of the room.
Different floor materials have different heat dissipation. In order to ensure room temperature requirements, the design should be based on wooden floors with lower heat dissipation than stone. Even if the user chooses stone as the floor, the heating effect will not be affected.
In order to balance the room temperature of rooms facing each direction in a household, directional additions and subtractions should be considered in the calculation of heat consumption. Rooms with many exterior walls will have more heat loss, and the heating pipes must be denser. The room price in the middle of the south-facing room will be hotter. If the loss is small, the distance between tubes must be larger.
Try to consider arranging domestic hot water pipes in the floor heating structure, but avoid pipelines crossing each other.
3. Several issues that should be paid attention to in the design of floor heating loops when designing floor heating
Reasonably divide the loop area, try to achieve room control, and avoid crossing with other pipelines. Pipes should not be laid underground. There should be an interface.
When designing, special attention should be paid to keeping the pipe lengths on the same sub-collector as consistent as possible to avoid imbalance of system resistance and waste of pipe materials.
For systems that use independent gas furnaces as heat sources, the pipe length should be controlled to be no longer than 1 meter to reduce resistance, and special attention should be paid to resistance balance and flow rate in the pipe.
In order to ensure that the ground does not crack, the distance between tubes should not be less than mm. In some areas that are too dense, a steel mesh should be added to the upper surface of the tubes. In addition, to ensure the uniformity of the ground temperature, the distance between tubes should not be greater than mm.
4. Issues that should be considered in system parameter design when designing floor heating
The water supply temperature should be less than ℃, the temperature difference between supply and return water should be less than ℃, and the system working pressure should not exceed.
Regardless of the heat source, parameters such as temperature, water volume, and pressure difference between the floor heating and water supply and return systems should match.
Special attention should be paid to the fact that when selecting parameters for design, the flow rate in the pipe must not be less than /, otherwise air locks will occur.
Low-temperature hot water floor radiant heating is a systematic project that integrates design, material selection, and management. It is a hidden project, so the quality requirements for all aspects of the project are very strict. No matter which link has a loophole, it will be It has a fatal impact on the safe service life of the entire system for more than 10 years, which directly affects the reputation of the floor heating industry and the company's own interests.
Floor heating design is very important. In order to achieve the ideal heating effect, everyone should choose a construction company with rich construction experience and reasonable design to carry out floor heating construction.