Danfoss DSS1 Data sheet

Data Sheet

Welded District Heating Stations

Type DSS1

General description and application:

District heating transfer stations provide the link between district heating suppliers and customers’ systems. They incorporate the necessary equipment to tailor the supplied heat to the needs of the object premises as specified in the heating supply contract. In this they need to comply with all applicable standards and with the supplier’s technical connection conditions. Indirect connections (in which district heating and inhouse systems are hydraulically isolated) incorporate components to separate the systems (heat exchanger), to limit the flow volume to that specified in the contract, regulate the secondary supply temperature and measure the energy consumption. The system described here is a standard type where primary medium is steam. On secondary heating circuits or modules can be connected optional.

Maximum operating

Primary

parameters:

Maximum permissible supply temperature, primary

TVP

200 °C

Maximum permissible operating pressure, primary

PZP

12,4 bar(g)

Rated pressure, primary

Maximum permissible pressure differential, primary

DPP

10 bar

Maximum permissible mass volume, primary

MZP

2.200 kg/h

Secondary

Maximum permissible supply temperature, secondary

TVS

110 °C

Maximum permissible operating pressure, secondary

PZS

10 bar or pending from safety valve

Rated pressure, secondary

Maximum permissible flow volume, secondary

VZS

73 m3/h bei w <= 1,5 m/s

Technical data:

Type: DSS1 IT xxx-xxx-0000-MD ->

040-040

050-050

065-065

080-080

100-100

125-125

Types:

SAP Code ->

004X6281

004X6282

004X6283

004X6284

004X6285

004X6286

Codes:

MZP [kg/h] max. ~

150

225

450

600

1200

1650

VZS [m3/h] dT 20K

4300,0

6450

12900

17200

34400

47300,0

DN size steam

DN 40

DN 50

DN 65

DN 80

DN 100

DN 125

DN size condensate

DN 20

DN size secondary

DN 40

DN 50

DN 65

DN 80

DN 100

DN 125

Type

Producer

capacity ca. ->

100 kW

150 kW

300 kW

400 kW

800 kW

1100 kW

Motorized valve

DANFOSS

VFGS2 PN16

32 / KVS16

50 / KVS32

65 / KVS50

80 / KVS80

100 / KVS125

Combi valve

DANFOSS

AVQM PN16

15 / 1,0

15 / 1,6

15 / 2,5

15 / 4,0

Heat exchanger

SECESPOL

SHR-VAS X

2.11

3.18

5.38

6.50

9.88

12.114

DN size

DN 40

DN 50

DN 65

DN 80

DN 100

Safety valve

GÖTZE/ARI

851H4/12903

½"

¾"

32 / 50

40 / 65

Materials:

Pipes and pipe fittings, flanges, moulded parts, sleeve nuts

1.0352, P235GH-TC1, CC491K (RG-5)

Heat exchanger

1.0038 / 1.4301 / 1.4307 / 1.4541

Fittings

0.6025 (GG25), 0.7043 (GGG-40.3), CC491K (RG-5)

Insulation (heat exchanger)

Mineral fiber mats/sheet metal coated RAL5000

Insulation (condensateand secondary)

PU Hard foam λ=0,029 W/mK (insulation class 3

acc. EN 12828/Annex C)

DHS-SRMT/PL


Data Sheet	Welded District Heating Stations Type DSS1

Function:	Steam substations provides special kind of indirect
	systems. Mainly steam is existing, if due to industrial
	processes of this must be generated and can also
	be used for heating.
	Here, the most common application of the con-
	densing control is shown. The main part of these
	systems is a standing Tube&Shell heat exchanger
	(HEX). The steam is here placed inside the tube of
	the device. Via control valve (24/25) on the conden-
	sing side of the system is the necessary secondary
	supply temperature (S3) is adjusted according to
	demand. On the steam side there is an integrated
	control valve (20/21) which in accordance with the
	statutory regulations is aware of the beyond the
	acceptable parameters on the secondary side. For
	this are DIN-security-proven thermostats (560/565)
	and, if necessary, safety pressostate (570/571) placed
	on secondary circuit. The use of depend on the pre-
	sent parameters of the system and can be adjusted
	individually as an option.

An optional selectable vacuum breaker (50) ensures that after switch off, for example, the system (steam safety control valve 20/21 and condensing control valve 24/25 closed) can give rise to no operation of the heat exchanger. Depending on the state is via the condensing control valve in tube of the heat exchanger precisely control the secondary supply temperature is possible.

Secondary additional heating modules can be connected. This can be adapted to the application of the electronic controller, if necessary.

Steam substations are always individually planned and explaining systems, where a high level of the accuracy already in designing is required.

With questions to design and individual adaptation to the conditions, please contact our sales engineers or the technical support.

Circuit diagram:
					S1		ECL
							ECL
							310
								50	560	565		100
								opt.		opt.
	200	220	430	20 /21	430	432	400	HEX		570	570	210
	200	220	430	20 /21	430	432	400		S3	opt	opt	410
								S5
	201	250	201	24 /25	201	221	401 431	270	280	MAG	571	210
	201	250	201	24 /25	201	221	401 431	270	280		opt	410
				201
200	Bellows shut-off valve						270	Drain valve
201	Bellows shut-off valve						280	Drain valve
220	Dirt trap / Strainer						560	Safety double thermostat TC/STM
221	Dirt trap / Strainer (fine screen)						565	Safety thermostat STL (optional)
250	Non-return valve						570	Pressure transmitter max. (optional)
20	Motorized control valve						100	Safety valve
21	Electrial actuator						440	Manometer
24	Combi (control) valve						MAG	Pressure retention connector
25	Electrial actuator						571	Pressure transmitter min. (optional)
400	Industrial thermometer						210	Butterfly valve
401	Industrial thermometer						410	Integrated bimetall thermometer
432	Manometer shut off valve & siphon						S1	Outdoor temperature sensor (loose)
431	Manometer						S3	Supply temperature sensor
50	Vacuumbreaker (optional)						S5	Return temperature limiter (sensor)
HEX	Tube & Shell heat exchanger						ECL 310	Electronic regulator

2	VD.JV.D1.02 © Danfoss 02/2016

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