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How is a heat meter measured?
Heat metering can be calculated by a heat meter, which is essentially a hot water heat accumulator. The hourly heating capacity of a hot water heating system can be calculated by the following formula: Q=M (i2-i1)=ρ V (i2-i1), where Q - heating capacity, W; i2, i1- enthalpy of supply and return water., J/kg； M - Mass flow rate of water, kg/s/； Ρ - density of water, kg/m； V - Volume flow rate of water, m/s。 Attention to Additional Information
(1) Changes in Heating Design Temperature Changes in Indoor Heating Design Temperature According to the "Technical Regulations for Household Heat Metering Design of Newly Built Centralized Heating Residential Buildings", the heating design temperature for the main indoor living space should be increased by 2 ℃ on the basis of the original, that is, the indoor design temperature should be increased from 18 ℃ to 20 ℃. The purpose of raising the temperature by 2 ℃ is to increase the total heat load and provide necessary conditions for achieving temperature control and flow regulation for heat users to enter the Hongzha River.
(2) The system must have good controllability and adjustability. Only with good controllability and adjustability can thermal users adjust the room temperature using temperature control valves according to their behavioral habits and economic conditions.
.(3) Heat metering should be charged according to the heating quality level. When the flow rate of household heat metering can be adjusted, the temperature of the water supply directly affects the users heat quality and the comfort level of indoor air temperature. Reference source: Baidu Baike - Heat Metering
2. What happens if the heatin_600x400.jpg)
The impact of not wiring the heating flowmeter needs to be judged according to its specific type, which may involve functional failure, abnormal readings, or uneven heating, and unauthorized modifications may pose legal and safety risks. If the heating flow meter is a balanced heat meter, its core function is to measure the flow rate of hot water in the pipeline and adjust the distribution of hot water in each branch to achieve heating balance. Untouching can cause it to malfunction, specifically manifested as: heating imbalance: when some rooms do not require heating (such as closing valves in Zenith), hot water may stagnate in the pipeline due to the inability of flow meters to monitor, resulting in insufficient or overheating heating in other rooms. Decreased system efficiency: Long term imbalance may cause abnormal pressure in the pipeline, increase pump load, and even shorten equipment life. The impact of unconnected flow meters on flow meters (such as electromagnetic flow meters, turbine flow meters, etc.) depends on electronic components and signal transmission for their readings. Untouched wires (especially ungrounded wires) may cause abnormal readings: External electromagnetic interference (such as nearby electrical appliances and high-voltage lines) can invade through ungrounded lines, causing reading fluctuations, deviations, or inability to display. Functional paralysis: Some flow meters need to be linked with the control system through a connecting line, and not being connected may result in their inability to transmit data, affecting the automation regulation of the heating system. The effect of not wiring a flow meter that only displays or switches functions. If the flow met