Data Sheet
Tube-in-tube heat exchanger
Type HE
Increases the system eciency and protects the system against liquid entering the compressor
Tube-in-tube heat exchanger type HE is used
primarily for heat transfer between the liquid
and suction lines of the refrigeration plant.
The purpose is to utilise the cooling eect,
utilise which without a heat exchanger is
otherwise lost to the ambient air via
uninsulated suction lines.
In the heat exchanger, this eect is used to
subcool the refrigerant liquid.
Features:
• High refrigeration capacity in evaporator
• Helps ensure vapour-free liquid ahead of the
expansion valve
• HE 0.5-1.5: May be used in the following EX
range: Category 3 (Zone 2)
• Maximum utilisation of the evaporator upon
setting the thermostatic expansion valve for
minimum superheat
• Helps prevent sweating and frosted-up
suction lines
AI124486417614en-001201
Refrigerants
R22, R1270
(1)
, R134a, R290
(1)
, R404A, R407A, R407C, R407F, R448A, R449A, R450A, R452A, R507A, R513A, R600
(1)
, R600a
(1)
Operating temperature
-60 – 120 °C
Max. working pressure
PS / MWP = 28 bar
Max. test pressure
Pe = 40 bar
R22
R134a
R404A
Danfoss
15D51.11
[°C]
[te]
[kW]
[Qe]
Danfoss
15D50.11
[°C]
[te]
[Qe]
[kW]
Danfoss
15D52.11
[°C]
[te]
[Qe]
[kW]
Tube-in-tube heat exchanger, Type HE
Product specication
Technical data
Table 1: Technical data
(1)
(1)
HE 0.5 - 1.5 only
HE 0.5 - 1.5 only
This product (HE 0.5 - 1.5) is evaluated for R290, R600, R600a and R1270 by ignition source assessment in accordance
with standard EN ISO80079-36.
For complete list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers,
where refrigerants are listed as part of technical data.
Capacity
Table 2: Capacity
Precise heat exchanger sizing can be obtained from the curves which show plant capacity Qe for R22, R134a and
R404A depending on evaporating temperature te.
Example
Plant capacity Qe = 4.5 kW
Refrigerant = R22
Evaporating temperature te = -25 °C
The curve for R22 shows that an HE 4.0 is suitable. The curve for HE 4.0 lies immediately above the intersection of
the lines
through Qee= 4.5 kW and tee= -25 °C.
Heat ow Q during heat exchange is calculated from the formula: Q=k×A×∆tm
Q-heat ow in [W]
k-heat transfer coecient in [W/m2] [°C]
A transfer area of the heat exchanger in [m2]
∆tm average temperature dierence in [°C], calculated from the formula:
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Danfoss
16D36.14
1.2.3.4.Suction line connection
Liquid line connection
Inner chamber
Outer chamber
Type
K × A
Dry suction gas / refrigerant liquid
(1)
(normal use in refrigeration plants with uorinated refrigerants) [W] / [°C]
HE 0.5
2.3
HE 1.0
3.1
HE 1.5
4.9
HE 4.0
11.0
HE 8.0
23.0
Tube-in-tube heat exchanger, Type HE
Δtm=
max .
In
Δt
Δt
min .
max .
min .
Δt
− t
k × A values Determined by experiment (see table).
(1)
(1)
These gures apply to dry gas only.
These gures apply to dry gas only.
Even if a thermostatic expansion valve is used, the suction gas will carry very small liquid drops into the suction line.
Even if a thermostatic expansion valve is used, the suction gas will carry very small liquid drops into the suction line.
The ns of the HE catch these drops which then evaporate.
The ns of the HE catch these drops which then evaporate.
This may result in a smaller superheat than the theoretically calculated value.
This may result in a smaller superheat than the theoretically calculated value.
Design
Oset n sections are built into the inner chamber (3) and result in a turbulent gas ow with minimum ow
resistance. The gas ows straight through without changing direction and without oil pockets.
Refrigerant liquid ows in the opposite direction to the gas, through the small outer chamber (4). The ow is guided
by a built-in wire coil so that maximum heat transfer is achieved. The hot liquid owing through the outer chamber
normally protects the outer tube from “sweating”.
Dimensions [mm] and weights [kg]
Figure 1: Dimensions [mm] and weights [kg]
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Type
H
1
L
L1L
2
øD
Net weight
Volume
Outer cham‐
ber[cm3]
Inner cham‐
ber[cm3]
HE 0.520178107
27.5
0.3
8.5
23
HE 1.025268129
30.2
0.52545
HE 1.5303231410
36.2140
100
HE 4.0383732010
48.3
1.580260
HE 8.0484072910
60.3
2.3
175
475
Type
Solder connection ODF
Code no.
Liquid line
Suction line
[in.]
[mm]
[in.]
[mm]
HE 0.5
–6–12015D0001
1/4–1/2–015D0002
HE 1.0
–10–16015D0003
3/8–5/8–015D0004
HE 1.5
–12–18015D0005
1/2–3/4–015D0006
HE 4.0
–12–28015D0007
1/2–1 1/8
–
015D0008
HE 8.0
–16–42015D0009
5/8–1 5/8
–
015D0010
File name
Document type
Document topic
Approvals Authority
Danfoss 034L9625.AB
Manufacturers Declaration
PED/RoHS
Danfoss
Danfoss 034R9541.AA
Manufacturers Declaration
China RoHS
Danfoss
Document - EAC RU ДDK.БЛ08.В.00327_18
EAC Declaration
EAC
EAC
Document - LLC CDC EURO-TYSK
UA.089.D.00001-19
UA Declaration
TYSK
TYSK
Tube-in-tube heat exchanger, Type HE
Table 3: Dimensions [mm] and weights [kg]
Ordering
Generally, the size of an HE heat exchanger can be determined from the connections corresponding to the pipe
dimensions of the refrigeration plant.
The design is such that normal suction gas velocities are achieved, with a subsequent small pressure drop. Thus the
heat exchanger capacity will match plant capacity.
At the same time, oil return to the compressor is ensured.
If the main object is to avoid sweating and frosting-up of the suction line, the HE can be chosen one size larger than
the size determined by the capacity. An HE used as an auxiliary condenser must always be selected according to the
connection dimensions.
Certicates, declarations, and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
Table 4: Certicates, declarations, and approvals
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