Rongtai Shengya Building Time Sharing Temperature Controller Building Site Time Division Temperature Controller
A: On-time controller temperature division control function
RSTY building site time-division temperature-division controller is a set of office buildings, student apartments and residential co-existence in the same external network system, to achieve continuous heating users and time-horizon heating users according to the heating time for independent management, the realization of the office building The functions of anti-freezing during heating hours and off hours are automatically switched at regular intervals.
Two: The main function
For office buildings and student apartments, real-time collection of building inlet water temperature and return water temperature and room temperature during the heating period, accurate drive of electric valves, control of the building for the distribution of heat, to ensure that the heating room temperature is relatively stable, in the antifreeze period, in real time Collect the return water temperature, control the action of the electric valve, ensure that the system water flow is normal, the indoor temperature is about 8°C, and reduce the energy consumption;
III: Applicability of time-division temperature controllers for heating systems in buildings
This heating system includes users who need 24-hour heating, such as residential buildings, and users that need only time-sharing, such as office buildings and student apartments, and are typical time-division heating users and continuous supply. Heating users coexist in heating systems;
To sum up, through time-division temperature-divided controllers and electric valves in buildings can easily realize time-sharing and quantity-based heating of buildings and ensure on-demand heating to avoid energy waste.
IV: Analysis of Control Principles of Time-division Temperature-division Controllers in Buildings
Theoretic basis of temperature-division time-division controller in building site
According to heating basic heat consumption calculation formula:
Q=K×F×(tn-tw)×α
K—structure heat transfer coefficient, W/m2°C;
F - heating area, m2;
Tn - winter indoor temperature, °C;
Tw - heating outdoor calculation temperature, °C;
α - The temperature difference correction factor of the maintenance structure.
With the same outdoor temperature conditions, assuming that the average outdoor temperature during the heating season is -2°C, the required indoor temperatures at 18°C ​​and 7°C are:
Q1=K×F×(20-(-2))×α (Q1 is the heat demand when the room temperature is 20°C)
Q2=K×F×(7-(-2))×α (Q2 is the required heat at an indoor temperature of 7°C)
then
That is, the required heat at a room temperature of 7°C is only 41% of that at 20°C. Therefore, when the average outdoor temperature is -2°C, nighttime freeze protection can reduce energy consumption by 60%.
V: Curve analysis of time-divided temperature controller in building
The relevant pipeline equipment for time-division temperature-division controllers in the building site mainly consists of:
Electric three-way valve, bypass valve, water supply temperature transmitter, return water temperature transmitter, mixed water temperature transmitter and manual butterfly valve, at the same time the indoor temperature of the controlled building is collected.
From the above system diagram, it can be seen that the circulating water supplied to the building is divided into two parts before entering the building. One part enters the building and participates in heating, and the other part enters the backwater main through the bypass pipe and the building backwater. When it is necessary to adjust the building load, the purpose of adjusting the indoor temperature can be achieved by adjusting the flow of the incoming building.
VI: Analysis of Energy Saving Effect of Building Site
During the working hours, the on-site time division temperature controller controls the opening of the electric valve according to the collected indoor temperature signal and the set indoor temperature requirements. When the collected indoor temperature is higher than the set indoor temperature, the electric valve will automatically turn off the small building. The amount of water supply, so as to achieve the purpose of reducing the heat into the building, and vice versa!!!
During off hours, the building site time-sharing temperature controller compares the collected indoor temperature signal with the set temperature requirement of the anti-freeze room and the temperature requirement of the frozen return water. When the room temperature is lower than the antifreeze set room temperature or the return water temperature is lower than the setting The system will automatically increase the opening of the electric three-way valve when the temperature is set to return to the water, that is, increase the circulation flow into the building to achieve the purpose of indoor temperature recovery, and avoid circulating water to freeze and vice versa. During off duty hours, the electric valve is open to 40% (ie: 0% to buildings, 60% to the total return pipe), that is, 40% of the hot water is involved in the circulation to prevent the circulating water system from freezing. Therefore, at this time, About 60% of the energy in the section of the building is saved;
The reconstructed system can manage the office building and the residential building separately, and when a number of office buildings are at different times or when one of them has overtime work, a separate building can be realized. Hot and the rest of the buildings went into antifreeze operation. (See the example below)
As shown in the above figure, the office building 1 and the office building 2 are two relatively independent systems, each with its own heating time and anti-freezing time, such as setting office building 1 from 21:00 for antifreeze, and setting up office building 2 from 23 : 00 began to prevent, between the two to achieve different anti-freezing time, there is a certain office building overtime work caused by the entire office system to synchronize heating and waste.
For the entire heating season of the teaching office building, approximately 64% of the time is in the anti-freeze state, and the student apartment is in the antifreeze state for approximately 33% of the time. Therefore, the time-division temperature controller and the electric three-way valve are used to realize the division of each building. Time-division temperature control energy saving space is very large.
6.1.1 Communication Function
Responsible for collecting the water supply temperature, return water temperature, indoor temperature and electric valve opening of the building and uploading the above signals to the control room. According to the user's requirements, the site controller can remotely control the on-site controller start/stop operation parameter settings, such as When an office building requires overtime heating, the on-site controller enters the anti-freeze operation period and can notify the master control room to start the on-site controller to run heating, which is convenient and quick.
Rongtai Shengya Co., Ltd. Product display: climate compensator; time-dividing temperature controller; gas boiler control; heat source comprehensive control; building time division temperature controller; pipe network balancing valve, wireless indoor temperature collector campus energy-saving total control system; Pump frequency control; Outdoor temperature collector, Beijing Rongtai Shengya climate compensator details, please call us or consult online:
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