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Old district heating problem
For a long time, the main problem of complaints from local residents is that some old communities have stopped heating the whole unit or even the whole building due to the arrears of some residents. Therefore, household heating and metering charges are the inevitable result of heating methods in various parts of China. For heating enterprises, it is a good thing to implement household heating metering. Heating households can save energy and reduce consumption, reduce production costs, and reduce the burden on users. Relevant policies stipulate that the indoor heating system after renovation should meet the requirements of household metering and room temperature adjustment. If the requirements are not met, all energy-saving renovation workloads will not be accounted for.
At present, most of the old buildings are not energy-efficient buildings. When designing the heating system, the old buildings did not consider the problems of energy saving and household measurement. If these heating systems are to be rebuilt, it is necessary to update the heating facilities and outdoor pipe networks in the residents' homes, and the corresponding investment is also large. At present, there are two main obstacles to the heating and reconstruction process of existing residential buildings:
1. High transformation cost
Because it is not an energy-efficient building, the old buildings did not consider energy conservation and household metering when designing the heating system. If these heating systems are to be rebuilt, it is necessary to update the heating facilities and outdoor pipe networks in the residents' homes, and the corresponding investment is also large. In addition, energy-saving renovation requires residents to bear part of the cost, and many residents currently do not understand the measurement of heating households, it is difficult to pay for this work.
2 , product quality, service is uneven
At present, there are many types of domestic thermal energy meter products, and the manufacturers of heat energy meters are also increasing rapidly. Some manufacturers have poor quality products, poor measurement accuracy and poor after-sales service. At the same time, some imperfect meter reading methods are not conducive to heat metering heating. The supervision of regional heating quality and metering and charging cannot timely grasp and solve various problems in heating metering charges, and some regional government units and residents are reluctant to renovate heating units.
It can be known from the above that the important factors that hinder the national energy conservation and emission reduction in the field of residential heating are the high cost of transformation and the uneven performance of meters. Many manufacturers' thermal meters only play a quantitative role, and they have not really realized the supply. At the thermal system level, the residents are tailored to save energy accordingly. Therefore, these problems have also seriously affected the process of heating renovation in China.
Heating household measurement concept
The heating household measurement is based on the premise of central heating or district heating , to meet the user's thermal comfort needs, enhance the user's awareness of energy conservation, and ensure the interests of both heat and heat. Through certain heating regulation technologies and measurement methods. And charging policies to achieve household metering and charging.
Comparison of the characteristics of three types of heat metering applications in China
          Table type      project name
Time area method timing device
Electromechanical heat meter
Ultrasonic heat meter
Measurement accuracy
Calculated is the average of the time area, the data is not accurate
Relatively low accuracy
High precision
installation angle
Horizontal or vertical
Level
Horizontal or vertical
Range ratio
no
low
high
Service life
Frequent valve switching and short service life
Due to mechanical wear, the meter has a short service life and is easy to block
No mechanical rotating parts, long service life and anti-blocking
Wear resistance
Valve switching process wear
Mechanical wear at all times during operation
No mechanical rotating parts; wear is negligible
Temperature range
Temperature has an effect on valve tightness, small range
Temperature influence table material and sealing, small range
Large range
stability
Relatively unstable
Relatively unstable
stable
Anti-interference ability
Strong anti-interference
Poor interference
Strong anti-interference
Pressure loss
Smaller
Larger
Smaller
Adjust the effect of the heat sink on the table
Replacement of the radiator does not measure correctly
No effect, can be measured correctly
No effect, can be measured correctly
Temperature accuracy
Indoor thermometer deviation is too large
PT1000 has high accuracy
PT1000 has high accuracy
Missing, misreporting
Valve quality problems, the lack of strictness leads to leakage
does not exist
does not exist
Pipe network monitoring and management
Not conducive to the monitoring and use of the entire pipe network thermal energy
Monitoring and management of pipe network can be realized with the system of collecting and copying
Monitoring and management of pipe network can be realized with the system of collecting and copying
Based on the transformation cost, construction difficulty, data accuracy and reliability, applicability, energy saving tips and monitoring, Shenzhen Guangning developed a centralized heat meter reading HODAMR system to solve the above problems in practical applications, HODAMR system It is an automatic meter reading system integrating computer technology, communication technology and network technology. With data acquisition , data communication, data storage, data processing, remote monitoring, real-time or timed completion of the system meter reading, nuclear, collection, inspection, control and other functions, a sound solution to the water division, electricity, gas companies and thermal companies Demand problem. The system solution can not only meet the user's business function requirements, but also focus on the system construction cost and benefit in design, and also reserve sufficient resources for the function expansion and compatibility of the subsequent system.
October 12, 2022