Danfoss HE 0.5, HE 1.0, HE 1.5, HE 4.0, HE 8.0 Data sheet

Data Sheet

Tube-in-tube heat exchanger
Type HE

Increases the system eciency 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 eect,
utilise which without a heat exchanger is
otherwise lost to the ambient air via
uninsulated suction lines.

In the heat exchanger, this eect 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 specication

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 coecient in [W/m2] [°C]
A transfer area of the heat exchanger in [m2]
∆tm average temperature dierence in [°C], calculated from the formula:

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