Danfoss CTM 6 Data sheet

Data Sheet

CTM High pressure valve Type CTM 6

Improves COP and lowers swept volume of the MT compressors in CO2 systems with parallel compressors

Danfoss Multi Ejector SolutionTM, consists of a CTM 6 High Pressure valve and an AK-PC 782A controller. This solution makes CO2 refrigeration systems economically competitive with the HFC systems at all ambient temperatures by improving COP in comparison to standard parallel compressor systems.

CO2 systems with Multi Ejector SolutionTM can be installed in any climate delivering lower

energy consumption than i.e. R404A. It removes the CO2 equator entirely.

CTM 6 HP is designed for CO2 systems with parallel compression to lift a part of the gas

from MT suction and mix it with the gas coming from the gas cooler at medium pressure level.

AI260946128833en-000601

Pressure

Danfoss 32F996.12

2 3

4 5

1234567

Nozzle

Throat

Exit

Mixing chamber

Diuser

Intake due to pressure dierential

Pressure increase due to reducing ow velocity

CTM High pressure valve, type CTM 6

Features

First Cost savings

• Lower cost compared to parallel compression transcritical CO2 packs due to lower swept volume of compressors. (i.e. smaller compressors or less number of compressors).

• Reliable and robust design.

• Fully integrated solution not requiring any additional components like check valves or motorized ball valves.

• Fully serviceable - wide range of spare parts and accessories.

• Easily accessible strainer / lter for fast maintenance.

• Brings rst cost savings.

◦ High pressure valve becomes redundant ◦ Enables 15 - 35 % savings on compressor swept volume, compared to booster systems.

Fast Pay Back – Energy saving

• Improved COP, enhanced operation of parallel compressors and lower swept volume to the MT compressors , resulting in lower energy consumption.

• Savings for end users

• Fast payback – lower energy consumption

◦ Less compressors and higher eciency on the systems, leads to payback time of less than 2 years on avarage

globally.

• The combination of CTM 6 High Pressure and the AK-PC 782A ensure an easy setup and commissioning, robust control of the system that ensures many years of problem free operation.

Functions

The Multi Ejector function

Figure 1: The Multi Ejector function

An ejector is a device that uses expansion energy to compress another uid. In this case with the transcritical system there is up to 20% of the compressor work that can theoretically be recovered in the expansion.

In this case with the Multi Ejector system the work is coming from the CO2 leaving the gas cooler. The high pressure CO2(PH) is entering the nozzle where the expansion is taking place. At the exit of the nozzle the speed is very high and as a consequence of that the pressure is low.

This low pressure is used to drag liquid from the MT suction accumulator (PL). From there the two ows are mixed in the mixing chamber where the pressure will be lower than at the drive inlet due to the mixing of vapour from a higher pressure.

After the mixing the ow enters the diuser where the ow is slowed down. The shape of the diuser enables the conversion from kinetic energy (velocity) to potential energy (pressure). After the diuser the ow is returned to the receiver.

AK-PC 782A

AKVH

Gas cooler

Liquid receiver

Medium temp. load

Low temp. load

Danfoss

AKS 11

MBS 8250

AKS 11

AK-CC 550A

AKS 11

FC 103

AKS 11

AKS 32R

AK-CC 550A

FC 103

IT MT

AKVH

AKS 11

DGS

CCMT

(ICMTS)

FC 103

MBS 8250

Multi Ejector High Pressure

AKS 32R

AK-SM 8XX/ AK-SM 720/

AKS 21A

HP High Pressure (120-140 bar Max working pressure)

HP Receiver Pressure (60-90 bar Max working pressure)

LP Suction Pressure MT (35-55 bar Max working pressure)

LP Suction Pressure LT (25-30 bar Max working pressure)

CTM High pressure valve, type CTM 6

Applications

The Multi Ejector is designed to lift a part of the gas from MT suction and mix it with the gas coming from the gas cooler at medium pressure level. Pre-compressed gas is taken from the receiver to parallel compressor which works more eciently due to lower pressure lift required.

Figure 2: Application

1000

2000

3000

4000

5000

6000

7000

40 50

70 80 90 100

110 120 130

HP 1875

HP 3875

Danfoss 32F866.10

XYInlet pressure HP side [Bar]

Mass ow HP side [kg/hr]

Refrigerant

R744 with oil

Maximum working pressure

140 bar / 2031 psi

Max. test pressure

1.43 x 140 bar / 1.43 x 2031 psi

Max. OPD

90 bar / 1305 psi (for single-voltage coil, 50 Hz)

Min. OPD

< 0.1 bar / 1.45 psi

Max. pres. dif. E and C connections

20 bar / 290 psi

Media temp. range

-10 °C – +50 °C / +14 °F – 122 °F

Ambient temp. range

-10 °C – +50 °C / +14 °F – 122 °F

Humidity

0 − 100% R.H. (0-97% R.H. non-condensation condition if IP level is below IPX5)

CTM High pressure valve, type CTM 6

High pressure lift ejectors design mass ow HP side

Figure 3: High pressure lift ejectors design mass ow HP side

Flow from the high pressure side (motive ow) for fully open ejector block as a function of temperature out of gas cooler.

Media

Technical data

Table 1: Technical data

Housing

Aluminium AW-6082 T6

Connections

Stainless steel AISI 304

Ejectors

Brass

Screws

Stainless steel A2-70

Danfoss

32F871.12

45 mm / 1.77 inch

192.5 mm / 7.6 inch

60 mm / 2.36 inch

90 mm / 3.54 inch

Ø 8.5 mm /

0.34 inch

250.7 mm / 9.9 inch

176 mm / 6.9 inch

106 mm / 4.2 inch

29 mm /

1.14 inch

47.3 mm / 1.86 inch

423.5 mm / 16.7 inch

287 mm / 11.3 inch

64 mm /

2.5 inch

200 mm / 7.9 inch

(pgc)

(p0)

rec

)

2I3

I4I

CTM High pressure valve, type CTM 6

Product specication

Material specication

Table 2: Material specication

Dimensions and weights

Figure 4: CTM 6(Weight: 9.1 Kg / 20.1 lb)

Connector positions

Figure 5: Connector positions

Danfoss 32F870

ESEjector

Strainer

ABCDE

FGHIJKL

Gas cooler outlet - Ball valve - inlet connector

Combi brazing 7/8 inch ODF - weld 3/4 inch

(EN10220)

Inlet measurement port G 7/16 inch - 20 UNF

Suction connector. MT evaporator outlet - Ball

valve - suction connector.

Combi brazing 7/8 inch ODF - weld 3/4 inch

(EN10220)

Suction measurement port G 7/16 inch - 20 UNF

Common outlet connector - Ball valve - Receiver

Combi brazing 1 inch ODF - weld 11/8 inch

(EN10220)

Outlet measurement port G 7/16 inch - 20 UNF

Strainer

Label

Ejector

Pressure transmitter MBS 8250 (064G1136)

High pressure inlet

Suction inlet

Receiver

Type

Code no.

Product name

Ejector 1

Ejector 2

Ejector 3

Ejector 4

Ejector 5

Ejector 6

CTM 6

032F5673

CTM Multi Ejec-

tor HP 1875

CTM EHP 125

CTM EHP 250

CTM EHP 500

CTM EHP 1000

Blank ejector

CTM 6

032F5698

CTM Multi Ejec-

tor HP 2875

CTM EHP 125

CTM EHP 250

CTM EHP 500

CTM EHP 1000

Blank ejector

CTM 6

032F5674

CTM Multi Ejec-

tor HP 3875

CTM EHP 125

CTM EHP 250

CTM EHP 500

CTM EHP 1000

CTM High pressure valve, type CTM 6

Mounting order of ejectors:

Ejectors with the highest capacities (longest ejectors) must be placed closest to the suction connector C. Any blank ejector should be placed after the ejectors.

Ordering

Valve conguration

Figure 6: Valve conguration

Table 3: Valve conguration

1.2.1.

CTM 6 HP 1875

CTM 6 HP 2875

CTM 6 HP 3875

Type

Capacity - Mass ow

(1)

Capacity - Mass ow

(2)

Code no. Single pack

[kg/h]

[lb/h]

CTM 6 HP 1875

1875

4134

032F5673

CTM 6 HP 2875

2875

6340

032F5698

CTM 6 HP 3875

3875

8543

032F5674

Image

Part

Type

Capacity - HP Mass

ow 1

Description

Code no. Single

pack

[kg/h]

[lb/h]

Ejectors

CTM EHP 125

125

275.5

1. Completely assembled ejector with O-rings already mounted

032F9102

CTM EHP 250

250

551

1. Completely assembled ejector with O-rings already mounted

032F9103

CTM EHP 500

500

1102

1. Completely assembled ejector with O-rings already mounted

032F9104

CTM EHP 1000

1000

2204

1. Completely assembled ejector with O-rings already mounted

032F9105

CTM Blank ejector

–

1. Completely assembled blank ejector with Orings already mounted

032F9112

Image

Part

Type

Description

Code no. Single pack

X 1

X 2

X 6

Strainer

CTM strainer

Mesh only 2 sets of 2 O-rings

032F9113

O-rings

CTM O-rings

2 sets of 2 O-rings for strainer 6 sets of 3 O-rings for ejectors

032F9114

Connectors

DN 20

Connector + O-ring

032F9116

DN 25

Connector + O-ring

032F9117

CTM High pressure valve, type CTM 6

Multi Ejector

Table 4: Multi Ejector

Table 5: Multi Ejector CTM 6

(1)

R744 at 90 bar / 35 °C

(2)

R744 at 1305 psi /95 °F

(HP = High Pressure lift) (The above code numbers are without coils which should be ordered separately – see coil ordering below).

Accessories

Spare parts

Table 6: Ejectors

Table 7: Strainer, O-rings and connectors

Image

Part

Type

Description

Code no.

Pressure transmitter

MBS 8250

Pressure transmitter with Oring

064G1136

Cable

–

10 meter cable for pressure transmitter

064G0950

Image

Type

Voltage

Frequency / Power consumption

Code no. Single

pack

[V]

[Hz]

[W]

[Hz]

[W]

with DIN plug

(1)

AS230CS

230508607

042N7601

AZ120CS

110 - 120508.5607

042N4202

Image

Type

Voltage [V]

Frequency

Code no. Single pack

DIN plug (LED)

230

50 / 60

042N0265

(1)

DIN plug

Max. 250

50 / 60

042N0156

CTM High pressure valve, type CTM 6

Table 8: Pressure transmitter and Cable

Coils

Table 9: DIN spade connection

(1)

The three pins on the coil can be tted with spade tabs, 6.3 mm wide (to DIN 46247). The two current carrying pins can also be tted with

The three pins on the coil can be tted with spade tabs, 6.3 mm wide (to DIN 46247). The two current carrying pins can also be tted with spade tabs, 4.8. mm wide. Max. lead cross section: 1.5 mm2. Voltage variation: V AC -15% - 10%, If DIN plug is used (DIN 43650) the leads must

spade tabs, 4.8. mm wide. Max. lead cross section: 1.5 mm2. Voltage variation: V AC -15% - 10%, If DIN plug is used (DIN 43650) the leads must be connected in the socket. The socket is tted with a Pg 11 screwed entry for 6 – 12 mm.

be connected in the socket. The socket is tted with a Pg 11 screwed entry for 6 – 12 mm.

Plug for DIN spade connection

Table 10: Plug for DIN spade connection

(1)

Only for AS230CS

Controller AK-PC 782A

Danfoss oers a wide range of market leading Pack Controllers. Being the ag ship and best in class controller for transcritical CO2 packs controls, the AK-PC 782A oers the highest possible eciency with the Multi Ejector, CTM.

The complete application control features:

• Complete booster pack control of up to 3 suction groups (max. 12 compressors) and high pressure system

• Signicant savings with heat recovery for Tap Water and heat reclaim

• Extensive control of oil ow and pressurization

• Best in class safety monitoring and fail-safe functions

• Minimal energy consumption while ensuring optimal food quality

• Auto-congured, easy-to-use graphical representation with Danfoss System Manager

• Independent, customised control and monitoring of auxiliary function

CTM High pressure valve, type CTM 6

Temperature sensors and pressure transmitters

Danfoss oers a comprehensive range of sensors for temperature and pressure sensors developed to meet the requirements of the entire pack application.

The sensor range delivers the following key features and benets:

• Long term reliability minimize system downtime.

• Robust construction protects against mechanical shock and vibration.

• Temperature sensor design ensures fast response time and precise measurement.

• Hermetically sealed pressure element ensures no leakage.

• Pressure transmitter output calibrated for perfect t to the application.

• Pulse snubber ensures protection against liquid hammering, cavitation or pressure peaks.

Disclaimer



WARNING:

The CTM Multi Ejector valve is approved for use only with Danfoss pack controller type AK-PC 78x.

Danfoss expressly disclaims, and any responsibility or liability, whether based on contract, breach of warranty, tort, statute or otherwise, shall be excluded, if the CTM Multi Ejector valve is used with any controller other than a Danfoss controller type AK-PC 78x.

For further information on AK-PC, please see separate document.

File name

Document type

Document topic

Approval authority

032F9627.AA

Manufacturers Declaration

PED

Danfoss

UL SA45046

Mechanical - Safety Certicate

CTM High pressure valve, type CTM 6

Certicates, declarations, and approvals

The list contains all certicates, 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 11: Certicates, declarations, and approvals

Coils: AS230CS: LLC CDC TYSK; The Low Voltage Directive 2014/35/EU (LVD);

Electromagnetic Compatibility Directive 2014/30/EU (EMC)

AZ120CS: C UR US; LLC CDC TYSK; The Low Voltage Directive 2014/35/EU (LVD); Electromagnetic Compatibility Directive 2014/30/EU (EMC)

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Danfoss CTM 6 Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual