Wuhan Qiaoxin Refrigeration Equipment CO., LTD |
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Tubular Heat Exchanger
Dry Type Spiral Baffle Plate Water - Cooled Evaporator
Dry shell and tube evaporator is widely used in refrigeration and
air conditioning industry, which has the
advantage of low refrigerant charging, high stability of the unit
operation, the disadvantage is that the
heat transfer coefficient is low.
Some studies have shown that the distribution of refrigerant in the
distribution of each tube is one of the
main reasons affecting its heat transfer performance, and domestic
and foreign research for dry shell and
tube heat exchanger mostly concentrated in the water side, for the
tube side refrigerant The distribution of
research less.
Therefore, in order to improve the overall energy efficiency and
economy of the refrigeration unit, it is
necessary to develop a pipetting device having a good liquid
separation function by seeking the
distribution mechanism of the tube side refrigerant.
Dry evaporators can be made of bare tubes, but also with
longitudinal fins of the finned tube made of
straight tube or u-shaped tube structure, but their overall
structure is basically the same.
The advantage of the dry evaporator is that the amount of the
refrigerant is small; when the temperature
is controlled by the temperature relay, it is sensitive to the load
change, the liquid supply is accurate; the
refrigerant flow rate is quick and the oil return is good; the
refrigerant is flowing outside the pipe, Flow
resistance loss is small; water for the refrigerant, the water in
the tube outside the constant mixing, rarely
icing phenomenon.
This evaporator when the aluminum core with the fin tube, the heat
transfer coefficient of up to 1000 ~
1200kcal / m2h ℃; with a small diameter dense tube, the heat
transfer coefficient of up to 900 ~ 1000kcal
/ m2h ℃.
DRY TYPE TUBE HEAT EXCHANGER EVAPORATOR (DOUBLE MACHINE)
CAPACITY: 120KW TO 310KW
Models | QXU120D8 | QXU135D8 | QXU155D8 | QXU185D10 | QXU220D10 | QXU270D10 | QXU310D10 | ||
Rated data ti=12°C te=2°C tu=7°C Dts=5°C | Qn | KW | 120 | 135 | 155 | 185 | 220 | 270 | 310 |
Kcal/h(×103 ) | 103.2 | 116 | 133.3 | 159 | 189 | 232 | 267 | ||
Wn | m3 /h | 20.6 | 23.2 | 26.7 | 31.8 | 37.8 | 46.4 | 53.3 | |
Wm | m3 /h | 25 | 28 | 30 | 41 | 43 | 65 | 68 | |
Dpn | bar | 0.41 | 0.44 | 0.37 | 0.36 | 0.43 | 0.42 | 0.43 |
Models | QXU120D8 | QXU135D8 | QXU155D8 | QXU185D10 | QXU220D10 | QXU270D10 | QXU310D10 | |
Dimension(mm) | A | 1815 | 2115 | 2315 | 2320 | 2320 | 2654 | 2654 |
B | 219 | 219 | 219 | 219 | 273 | 273 | 273 | |
C | 200 | 200 | 200 | 200 | 234 | 234 | 234 | |
D | 1530 | 1830 | 2030 | 2000 | 2000 | 2280 | 2280 | |
E | 240 | 240 | 240 | 300 | 300 | 300 | 300 | |
Vent | S1 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 |
Outlet | S2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 |
Connection | W(DN) | 89 | 89 | 89 | 89 | 114 | 114 | 114 |
D1(mm) | 22 | 22 | 22 | 22 | 35 | 35 | 35 | |
D2(mm) | 42 | 42 | 42 | 42 | 54 | 54 | 54 | |
P(kg) | 145 | 155 | 163 | 232 | 255 | 279 | 296 | |
Qn-rated refrigerating capacity Wn-cooling water flow Wm-maximum cooling water flow Dpn-pressure drop of recirculating cooling water Dts-overheat temperature |
COOPERATED CLENTS