Design advantages and ventilation methods of a detachable plate heat exchanger
Release time:
2022-10-24 11:00
Source:
Design advantages and ventilation methods of dismountable plate heat exchangers
The dismountable plate heat exchanger only has a heat conversion function. It follows the basic law of kinetic energy conservation, that is, the heat released by the hot side is equal to the heat absorbed by the cold side. In most cases, the heat on the hot side comes from the hot system software, and the heat is not taken away by the cold-side cooling circulating water. If the water flow is insufficient or the water temperature is insufficient, the temperature on the hot side will not decrease. If this is the case, no matter how large the heat exchanger is, it will not work.
The application of dismountable plate heat exchangers in low-temperature environment radiation source heating is divided into two types: water-water heat transfer and steam-water heat transfer. When steam is used as the heat source, low-voltage saturated steam must be used. The commonly used working pressure in projects is: gauge pressure 0.3MPa or gauge pressure 0.4MPa, and the steam temperatures at this time are 144℃ and 152℃ respectively. When boiling water is used as the heat source, the spacing of the hot water pipes used for floor heating is generally 95/70℃. During radiant heating, the hot water temperature at the end of the radiation source should not be too high.
A thin rectangular safety channel is formed between the plates, and heat exchange is mainly carried out through the half-plate. It has the advantages of high heat exchange efficiency, low heat loss, compact and lightweight structure, small floor area, convenient assembly and cleaning, wide range of applications, and durability. The method of increasing the logarithmic mean temperature difference of the heat exchanger can improve the heat exchange efficiency of the heat exchanger. It is best to use countercurrent or near-countercurrent mixed flow types as much as possible, and avoid increasing the temperature of the hot-side fluid and reducing the temperature of the cold-side fluid as much as possible. Under the same conditions, the logarithmic mean temperature difference is large during countercurrent flow and small during cocurrent flow, and the mixed flow type is between the two. Cleaning this heat exchanger is also very convenient.
What are the ventilation methods for dismountable plate heat exchangers?
Dismountable plate heat exchangers also generate heat during use, which is due to their exhaust function. There are two main ventilation modes. Let's explain the ventilation methods of plate heat exchangers in detail!
1. Blower type: The gas flows through the blower before being injected into the tube bundle; the operation cost is relatively economical, and the resulting seepage is beneficial to heat transfer, and it is widely used.
2. Induced draft fan type: The gas flows through the tube bundle before being injected into the exhaust fan. The airflow distribution is uniform, which is beneficial to the accurate control of the ambient temperature of the plate heat exchanger unit, and the noise is low, which is a development trend.
The inlet and outlet temperatures of the hot fluid mainly depend on
When using a dismountable plate heat exchanger, these ventilation methods can also be selected according to the application of the machine.
Related News
WeChat Mini Program
WeChat public account
Service line:
Mobile:+86-15064136769
+86-13869137166
Mailbox:zhilin@sdzhilin.cn
Address: South Park, Jinan Economic Development Zone, Shandong Province