The principle of heat energy meter and its battery usage instructions

by:CTECHi     2021-07-30

Overview of the heat meter

In winter, heating is required in the north. In order to save energy and reduce smoke and dust, most areas have centralized heating through the heating network. In the past, because residents did not install heat meters in their homes, they had to charge based on the building area. However, it is obviously unreasonable to charge heating fees according to the building area, and it should be calculated according to the heat energy actually used by the users.

An instrument that automatically accumulates heat; the application of heat energy meters solves this problem. The thermal energy meter is a brand-new technological invention. It not only has the functions of several other thermal instruments, such as temperature meters and flow meters, but also completes the automatic, fast and accurate measurement of thermal energy.

So it is not a combination of several thermal instruments, but a technological qualitative leap. The characteristic of the thermal energy meter is that it can not only complete the rapid, automatic and accurate measurement of heat energy, but also complete the measurement of the amount of hot water lost by the radiator. At the same time, the heat dissipation of the radiator can be adjusted.

The thermal energy meter consists of three parts, which are the feedwater sensor control device, the return water sensor device and the central data logic processing control device. The feedwater sensor control device It is also composed of a feedwater temperature sensor, a feedwater flow sensor and an electromagnetic regulating valve; the backwater sensing device is composed of a backwater temperature sensor and a backwater flow sensor; the central data logic processing control device is the core component of the heat meter, which is composed of a logic integrated circuit The temperature and flow value of the feed water and return water of the radiator delivered by the sensors are used. According to the liquid during the heat transfer process, there is no change in the state of the liquid but only when the temperature changes (such as the temperature of the liquid rises or Decrease) is the characteristic that the heat absorbed or released is proportional to the temperature of the object, that is, Qu003dcm△t, and the heat dissipation capacity of the radiator is calculated. And the central data logic processing control device can also calculate the amount of water lost through the radiator.

The working principle of the heat meter: install a pair of temperature sensors on the up and down pipes that pass the heat-carrying fluid, and install the flowmeter on the fluid inlet or return pipe (the flowmeter is installed at different positions , The final measurement results are also different), the flow meter sends out a pulse signal that is proportional to the heat meter and the flow rate, a pair of temperature sensors gives an analog signal indicating the temperature level, and the integrator collects the signals from the flow rate and temperature sensors, and uses the product The calculation formula calculates the heat obtained by the heat exchange system.

The meter reading system of the thermal energy meter: Smart thermal energy meters use wireless meter reading (such as thermal GPRS wireless meter reading, far infrared meter reading, etc.), and there is a signal transmission in the central data logic processing control device And receiving device. Thermal energy meter's battery requirements All these tasks of thermal energy meter require a power source to complete. As the power supply of a smart heat meter, it must have a stable working voltage, a long working life (more than 6 years), a wide working temperature range and be able to withstand high temperature and humidity (such as -55℃~+85℃, RH90% Above) working or storage conditions.

According to these working characteristics and special working environment of the heat energy meter, Wuhan Fuant Technology Co., Ltd. has customized a battery for it; a special lithium battery for heat energy meter (such as ER18505HS, ER14505HS, etc.): This battery is a new characteristic battery developed on the basis of conventional lithium thionyl chloride batteries and high-temperature batteries. Compared with conventional batteries, it has better high-temperature resistance (withstands +85°C working temperature). ), compared with high-temperature batteries, it has outstanding anti-hysteresis performance and small self-discharge characteristics (stored at +70℃ for three months, it can work normally).

Typical working mode of thermal energy meter: Generally, the thermal energy meter does not consume large current, but requires high reliability and long life of the battery.

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