Danfoss HRU Data sheet

Data sheet
HRU – Heat Recovery Unit
General description and application
Danfoss Heat Recovery Unit provide the link between a CO₂ refrigeration systems and the heating installation. It is developed and designed for recovery of waste heat from refrigeration installations, where CO₂ is used as medium, to heat supermarkets (hot tap water, heating, air handling units) and enables selling surplus heat back to the district heating network. Danfoss HRU can be used in installations with different external heat supply, such as District energy, boiler or other heat source.
Characteristic:
Heating demand: 22-540 kW
Maximum recovered heat from C0₂ pack up to 50-400kW
Two different solutions based on store size:
1. one- tank solution - for small stores up to 1500 m
2. two-tanks solution - for medium and large stores
Standard layout in 6 versions:
• indirect connection (type A2,A6) or directly
connection (type A4,A7).
• indirect connection (type A1) or connection
to DHU (type A3), designed for areas where it is possible to sell heat to DHU network.
Maximum operating parameters
Materials
Primary
Maximum permissible supply temperature, primary* 90 °C Maximum permissible operating pressure, primary 10 bar Rated pressure, primary PN 10 Maximum permissible flow primary
Secondary heating
Maximum permissible temperature, secondary* 90 °C Maximum permissible operating pressure, secondary (A1, A2) – 6 bar, (A3, A4, A6, A7) – 10 bar Minimum required pressure (static), water supply 1,0 bar Maximum permissible flow secondary
CO heat supply
Maximum permissible temperature secondary 90 °C Maximum permissible operating pressure, secondary (A1, A2) – 6 bar, (A3, A4, A6, A7) – 10 bar Minimum required pressure (static), water supply 1,0 bar
* For higher te mperatures – contac t Danfoss
Pipes, fittings, flanges, valves (Primary side) P235GH, EN-GJL-250 (GG25), CuZn36Pb2As Pipes, fittings, flanges, valves (Heating side) P235GH, EN-GJL-250 (GG25), CuSn5Pb5Zn5-C (RG-5) Heat exchanger 1.4404 with Cu solder Insulation Elstomeric Foam (Nitrile Rubber) – λ = 0.035 W/mK (piping)
PU foam – λ = 0.029 W/mK (heat exchanger)
15 m³/h for v= 1,2 m/s ( A1, A2, A3, A4) 3 m³/h for v= 1,2 m/s ( A6,A7)
15 m³/h for v= 1,2 m/s ( A1, A2, A3, A4) 3 m³/h for v= 1,2 m/s ( A6,A7)
© Danfoss | 2018.08
VD.MG.D2.02 | 1
Data sheet HRU – Heat Recovery Unit
Circuit diagram A1 Indirect connection to DHU network with possibility of transfer heat outside heating system
Twotanks solution
1 DH supply 2 DH return
DN40
*
DN40
3 Heating supply 4 Heating return 5 Supply from
cooling unit
Return to
cooling unit
DN40
DN40
7 DH supply  DH return
* Connections DH⁄HE: up to 216 KWDN 40 up to 337 kWDN50 up to 540 kWDN65
*
A1 selection list
CO2 output [kW] (sales demand)
up to
100
up to
150
up to 22 146B9108 146B9109 up to 54 146B9120 146B9121 146B9122 146B9123 up to 85 146B9126 146B9127 146B9128 146B9129
up to 135 146B9132 146B9133 14 6B9134 146B9135
[kW]
up to 216 146B9138 146B9139 146B9140 146B9141 up to 337 146B9144 146B9145 146B9146 146B9147
Heating demand
up to 540 14 6B9150 146B9151 14 6B9152 14 6B9153
Function Waste heat from CO system is transferred via
CO heat exchanger * using water as medium, into supply storage tanks T2 and T1.
The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tanks will be transferred into the heating circuit.
Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source. The temperature sensor (S8) control the pump (P3) and when the temperature reaches the desired level and no more heat can be accumulated. Secondary heat meters (F1 and F2) are measuring flow and heat meter F3 on the charging circuit calculates the recovered energy.
up to
300
up to
400
The primary function is to recover as much energy as possible and secondary as high temperature as possible We always prioritize usage of heat recovered from cooling unit before supplying from external heat source A1 version offers returning heat back into the DHU network or other external network via heat exchanger HEX2 If the recovered energy is more than the stores can reuse the pump P4 is activated so this energy can be sold to the district heating
2 | © Danfoss | 2018.08
* CO₂ HEX is not included in the d elivery of HRU, but is part of the coolin g unit
VD.MG.D2.02
Data sheet HRU – Heat Recovery Unit
Circuit diagram A2 Indirect connection to DHU network
Twotanks solution
DN40* DN40*
1 DH supply 2 DH return 3 Heating supply 4 Heating return 5 Supply from
cooling unit
Return to
cooling unit
DN40
* Connections DH⁄HE: up to 216 KWDN 40 up to 337 kWDN50 up to 540 kWDN65
A2 selection list
CO2 output [kW]
up to 100 up to 150 up to 300 up to 400
up to 135 146B9164 146B9165 up to 216 146B9168 146B9169 146B9170 up to 337 14 6B9173 146B9174 146B9175 146B9176
Heating
up to 540 146B9179 146B9180 146B9181 146B9182
demand [kW]
Function Waste heat from CO₂ system is transferred via
CO₂ heat exchanger * using water as medium, into supply storage tanks T2 and T1.
The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tanks will be transferred into the heating circuit. Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source.
The temperature sensor (S8) controls the pump with PWM signal (P3) and when the temperature reaches the desired level and no more heat can be accumulated.
In two-tanks solution application, secondary heat meters (F1 and F2) are measuring flow and heat meter F3 on the charging circuit calculates the recovered energy.
* CO₂ HEX is not inclu ded in the delivery of H RU, but is part of the cooling uni t)
The primary function is to recover as much energy as possible, and secondary as high temperature as possible.
We always prioritize usage of heat recovered from cooling unit, before supplying from external heat source.
VD.MG.D2.02
© Danfoss | 2018.08 |PL
Data sheet HRU – Heat Recovery Unit
Circuit diagram A3 Direct connection to DHU network with possibility of transfer heat outside heating system
Twotanks solution
1 DH supply 2 DH return 3 Heating supply
DN40* DN40*
4 Heating return 5 Supply from
Cooling unit
Return to
cooling unit
7 DH supply
DN40 DN40
DH return
* Connections DH⁄HE: up to 216 KWDN 40 up to 337 kWDN50 up to 540 kWDN65
A3 selection list
CO2 output [kW] (Sales demand)
up to
100
up to
150
up to 22 146B9191 146B9192 up to 54 146B9203 14 6B9204 146B9205 146B9206 up to 85 146B9209 146B9210 146 B9211 146B9212
up to 135 146B9215 146B9216 146B9217 146B9218
[kW]
up to 216 146B9221 146B9222 146B9223 146B9224
up to 337 146B9227 146B9228 146B9229 146B9230
Heating demand
up to 540 146B9233 146B9234 146B9235 146B9236
Function Waste heat from CO system is transferred via
CO heat exchanger * using water as medium, into supply storage tanks T2 and T1.
The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tanks will be transferred into the heating circuit.
Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source. The temperature sensor (S8) control the pump (P3) and when the temperature reaches the desired level and no more heat can be accumulated. Secondary heat meters (F1 and F2) are measuring flow and heat meter F3 on the charging circuit calculates the recovered energy.
up to
300
up to
400
The primary function is to recover as much energy as possible and secondary as high temperature as possible We always prioritize usage of heat recovered from cooling unit before supplying from external heat source A3 version offers returning heat back into the DHU network or other external network via heat exchanger HEX2 If the recovered energy is more than the stores can reuse the pump P4 is activated so this energy can be sold to the district heating
4 | © Danfoss | 2018.08
* CO₂ HEX is not included in the d elivery of HRU, but is part of the coolin g unit
VD.MG.D2.02
Data sheet HRU – Heat Recovery Unit
Circuit diagram A4 Direct connection to DHU network
Twotanks solution
1 DH supply 2 DH return 3 Heating supply
DN40* DN40*
4 Heating return 5 Supply from
Cooling unit
Return to
cooling unit 7 DH supply  DH return
* Connections DH⁄HE: up to 216 KWDN 40 up to 337 kWDN50 up to 540 kWDN65
DN40
A4 selection list
CO2 output [kW]
up to 100 up to 150 up to 300 up to 400
up to 135 14 6B9247 146B924 8
up to 216 146B9251 14 6B9252 146B9253
up to 337 146B9256 146B9257 14 6B9258 146B9259
Heating
up to 540 146B9262 146B9263 146B9264 14 6B9265
demand [kW]
Function Waste heat from CO₂ system is transferred via
CO₂ heat exchanger * using water as medium, into supply storage tanks T2 and T1.
The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tanks will be transferred into the heating circuit. Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source.
The temperature sensor (S8) controls the pump with PWM signal (P3) and when the temperature reaches the desired level and no more heat can be accumulated.
In two-tanks solution application, secondary heat meters (F1 and F2) are measuring flow and heat meter F3 on the charging circuit calculates the recovered.
* CO HEX is not included in the delivery of HRU but is part of the cooling unit
The primary function is to recover as much energy as possible, and secondary as high temperature as possible.
We always prioritize usage of heat recovered from cooling unit, before supplying from external heat source.
VD.MG.D2.02
© Danfoss | 2018.08 |PL
Data sheet HRU – Heat Recovery Unit
Circuit diagram A6 Direct connection to DHU network with possibility of transfer heat outside heating system
Onetank solution
1 DH supply 2 DH return 3 Heating supply 4 Heating return 5 Supply from
Cooling unit
Return to
cooling unit
A6 selection list
CO2 output [kW]
up to 100
up to 22 146B940 0
up to 54 146B9401
Heating
up to 85 146B94 02
demand [kW]
Function Waste heat from CO₂ system is transferred via
CO₂heat exchanger * using water as medium, into supply storage tank T2. The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tank will be transferred into the heating circuit. Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source. The temperature sensor (S8) control the pump with PWM signal (P3) and when the temperature reaches the desired level and no more heat can be accumulated. In one-tank solution application, heat meter F3 on the charging circuit calculates the recovered energy.
The primary function is to recover as much energy as possible, and secondary as high temperature as possible.
We always prioritize usage of heat recovered from cooling unit, before supplying from external heat source.
6 | © Danfoss | 2018.08
* CO₂ HEX is not included in the d elivery of HRU, but is part of the coolin g unit
VD.MG.D2.02
Data sheet HRU – Heat Recovery Unit
Circuit diagram A7 Direct connection to DHU network
Onetank solution
1 DH supply 2 DH return 3 Heating supply 4 Heating return 5 Supply from
Cooling unit  Return to
cooling unit
A7 selection list
CO2 output [kW]
up to 100
up to 22 146B9403
up to 54 146B940 4
Heating
up to 85 146B9405
demand [kW]
Function Waste heat from CO₂ system is transferred via
CO₂heat exchanger * using water as medium, into supply storage tank T2. The temperature sensor (S6) check the temperature in tank (T2) and send a signal to a 3-way valve (M1), which will open and heat accumulated in tank will be transferred into the heating circuit. Lower demand for heat will cause closing of the controlling valve (M2) and reduce or cut the need for energy from the external heat source. The temperature sensor (S8) control the pump with PWM signal (P3) and when the temperature reaches the desired level and no more heat can be accumulated. In one-tank solution application, heat meter F3 on the charging circuit calculates the recovered energy.
The primary function is to recover as much energy as possible, and secondary as high temperature as possible.
We always prioritize usage of heat recovered from cooling unit, before supplying from external heat source.temperature as possible.
We always prioritize usage of heat recovered from cooling unit, before supplying from external heat source.
VD.MG.D2.02
* CO₂ HEX is not included in the d elivery of HRU, but is part of the coolin g unit
© Danfoss | 2018.08 |PL
Data sheet HRU – Heat Recovery Unit
Dimensions
Twotanks solution (A1 A2 A3 A4)
max. 2000 mm
max. 2800 mm
8
23
5
Component overview
max. 1200 mm
4
1
67
Item ( see circuit diagram) Description 100, 120, 125 Check valve 200, 210 Shut-off Ball valve AMZ112 Motorized ON/OFF ball valve FPN Flowswitch DN25 400 Air vent 500 Drain F1F2F3 Heat meter M1 Motorized Control valve HE 3way VRB+AMV M2 M3 Motorized Combi valve AHQM + AMV P3 Pump P4 Pump  ver A1 A3 S1 Outdoor temperature sensor ESMT S3 S5 S7S9 Surface temperature sensor ESM S6 S Immersion temperature sensor ESMU 250 T1 T2 Tank 6 bar( ver A1 A2) Tank 10 bar( A A  HEX1 Heat exchanger XB 37⁄XB  (ver A1 A2 HEX Heat exchanger XB 37⁄XB59 (ver A1 A3 ECL Electronic controller+ A501
8 | © Danfoss | 2018.08
VD.MG.D2.02
Data sheet HRU – Heat Recovery Unit
1
2
3
45
6
max. 2000 mm
max. 1500 mm
max. 800 mm
Dimensions
Onetank solution (A6, A7)
Component overview
Item ( see circuit diagram) Description 100, 120 Check valve 200, 210 Shut-off Ball valve 400 Air vent 500 Drain F3 Heat meter M1 Motorized Control valve HE 3way VRB+AMV M2 Motorized Combi valve AHQM + AMV P3 Pump S1 Outdoor temperature sensor ESMT S3 S5 S7 Surface temperature sensor ESM S6 S Immersion temperature sensor ESMU 250 T2 Tank 10 bar( ver A6 A7) HEX Heat exchanger XB 37⁄XB  (ver A6 ECL Electronic controller+ P501
VD.MG.D2.02
© Danfoss | 2018.08 |PL
Data sheet HRU – Heat Recovery Unit
10 | © Danfoss | DHS-SMCT/PL | 2018.08
VD.MG.D2.02
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