Positive Displacement Heat Exchanger For Efficient Hot Water Heating In Boilers

What is an LMTD heat exchanger?
What is the importance of LMTD in heat exchanger? - Quora
LMTD stands for Logarithmic Mean Temperature Difference. Its used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is logarithmic average of the temperature difference between the hot and cold feeds at each end of the double pipe exchanger.

Product description

The new volumetric heat exchanger is a new type of volumetric heat exchanger developed by the Architectural Design Institute of the Ministry of Construction of China, which has made significant improvements based on the advantages of volumetric heat exchangers. After being tested by the North China Industrial Boiler Testing Center of the Ministry of Machinery and Electronics Industry, various thermal performance and comprehensive indicators are at the forefront of similar products in China; It is widely used in hot water supply systems in general industrial and civil buildings.
product details
The RV series new volumetric heat exchanger is a new type of volumetric heat exchanger developed by the Architectural Design Institute of the Ministry of Construction of China, which has made significant improvements based on the advantages of the RV-02 series volumetric heat exchanger. After being tested by the North China Industrial Boiler Testing Center of the Ministry of Machinery and Electronics Industry, various thermal performance and comprehensive indicators are at the forefront of similar products in China; It is widely used in hot water supply systems in general industrial and civil buildings.
Performance characteristics
1. The heating medium and the heated water flow rate have been greatly improved, and the heat transfer coefficient has been greatly improved;

2. Adequate heat exchange, during steam water heat exchange, can lower the outlet temperature of condensate to 50 ℃, simplifying the heat exchange system and achieving more effective energy conservation;

3. Small cold water area with high volume utilization rate;

4. The tank body occupies a small area, and the space required for extracting the tube bundle is small. Moreover, only one side of the tube needs to be extracted, reducing maintenance space and saving investment;

5. The volumetric heat exchanger maintains a large water storage capacity and a small pressure head loss (≤ 0.003MPa) on the heated water side

Advantages: It is beneficial for the system to balance the hot water pressure.
RV 03-1 5 S 0 4/0 6 represents a volume of 1 A new type of horizontal volumetric heat exchanger with a design pressure of 0.4 MPa for the tube side and 0.6 MPa for the shell side, with a heating medium of 5 m3 and saturated steam.
 

Working principle
1. Increase the flow rate between the heat medium and the heated water, so that the heat transfer between the heat medium and the heated water changes from laminar heat transfer to turbulent heat transfer;
2. Make full use of the density difference between cold and hot water during the initial heating inside the tank to form a natural circulation and heat the cold water at the bottom of the tank.

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