HRU Heat Recovery Unit

Transcription

1 eneral description and application Danfoss Heat Recovery Unit provide the link between a Cooling unit and the heating installation. It is developed and designed for recovery of waste heat from refrigeration installations, where CO 2 is used as medium. It can be used in installations with different external heat supply, such as District energy, boiler or other heat source. The HRU units can be delivered as indirect connected substations with heat exchanger for heating (type A2) or as directly connected to a District Heating Utility network (type A4). specially for areas where it is possible to return back heat to District Heating Utility network, two versions of the HRU units were designed with indirect connection to DHU network (type A1) and direct connection (type A3). This solution allows to return heat into primary network and sell it. It is a perfect opportunity to reduce heating payments from waste heat. All HRU include control equipment (regulating valves, controller, pumps), measuring devices (sensors, heat meters) and heat accumulation tanks. The newly developed application key for CL310 allows monitoring and visualizing via CL Portal. aximum operating parameters Primary aximum permissible supply temperature, primary* 90 C aximum permissible operating pressure, primary 10 bar Rated pressure, primary PN 10 Secondary heating aximum permissible temperature, secondary* 90 C aximum permissible operating pressure, secondary (A1, A2) 6 bar, (A3, A4) 10 bar inimum required pressure (static), water supply 1,0 bar CO2 heat supply aximum permissible temperature, secondary 90 C aximum permissible operating pressure, secondary (A1, A2) 6 bar, (A3, A4) 10 bar inimum required pressure (static), water supply 1,0 bar * or higher temperatures contact Danfoss aterials Pipes, fittings, flanges, valves (Primary side) P235H, N-JL-250 (25), CuZn36Pb2As Pipes, fittings, flanges, valves (Heating side) P235H, N-JL-250 (25), CuSn5Pb5Zn5-C (R-5) Heat exchanger with Cu solder Insulation lstomeric oam (Nitrile Rubber) λ = W/mK (piping) PU foam λ = W/mK (heat exchanger) Danfoss VD..D1.02 1

2 Circuit diagram A1 Indirect connection to DHU network with possibility of transfer heat outside heating system CL S1 1 S14 V1 1 S3 3 7 DH supply 8 DH return Primary S5 S9 Primary Danfoss Poland Sp. z o.o. V2 2 P4 S8 T S6 T2 1 P3 3 S7 3 Heating B8-146B8253 (A1) A1 selection list CO 2 output [kw] (Sales demand) B8 146B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B8253 unction (1), which will open and heat accumulated in tanks will be transferred into the heating. controlling valve (2) and reduce or cut the need (3) when the temperature reaches the desired Secondary heat meters (1 and 2) are measuring flow and heat meter 3 on the CO 2 A1 version offers returning heat back into the district heating network or other heat receiver via heat exchanger V2. If the waste energy is more than we can reuse our self, the pump P4 is activated and we will start selling energy. 2 Danfoss VD..D1.02

3 Circuit diagram A2 Indirect connection to DHU network A2 selection list CO 2 output [kw] B B B B B B B B B B B B B B B B B B B B B B B B B B B B B8282 unction (1), which will open and heat accumulated in tanks will be transferred into the heating. controlling valve (2) and reduce or cut the need (3) when the temperature reaches the desired Secondary heat meters (1 and 2) are measuring flow and heat meter 3 on the CO 2 VD..D1.02 Danfoss PL

4 Circuit diagram A3 Direct connection to DHU network with possibility of transfer heat outside heating system CL S1 1 S14 1 S3 3 7 DH supply 8 DH return Primary Primary S5 S9 V2 2 P4 S8 T1 S T2 1 P3 3 S7 3 Heating A3 selection list CO 2 output [kw] (Sales demand) B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B8336 unction (1), which will open and heat accumulated in tanks will be transferred into the heating. controlling valve (2) and reduce or cut the need (3) when the temperature reaches the desired Secondary heat meters (1 and 2) are measuring flow and heat meter 3 on the CO 2 A3 version offers returning heat back into the district heating network or other heat receiver via heat exchanger V2. If the waste energy is more than we can reuse our self, the pump P4 is activated and we will start selling energy. 4 Danfoss VD..D1.02

5 Circuit diagram A4 Direct connection to DHU network A4 selection list CO 2 output [kw] B B B B B B B B B B B B B B B B B B B B B B B B B B B B B8365 unction (1), which will open and heat accumulated in tanks will be transferred into the heating. controlling valve (2) and reduce or cut the need (3) when the temperature reaches the desired Secondary heat meters (1 and 2) are measuring flow and heat meter 3 on the CO 2 VD..D1.02 Danfoss PL

6 Dimensions max. 0 mm max mm max. 1 mm Component overview Item Description,110,120 Check valve Shut-off Ball valve Balancing valve SV-BD (ver. A1, A3) 310 Balancing valve SV-BD Air vent Drain 1,2,3 Heat meter 1 otorized Control valve H (3-way) VRB3+AV 2, 3 otorized Combi valve AHQ + AV P3 Pump P4 Pump ( ver. A1, A3) S1 Outdoor temperature sensor, ST S3, S5, S7,S9, S14 Surface temperature sensor, S-11 S6, S8 Immersion temperature sensor, SU 250 T1, T2 Tank 6 bar( ver. A1, A2), Tank 10 bar( ver. A3, A4) V1 Heat exchanger XB 37/XB 59 (ver. A1, A2) V2 Heat exchanger XB 37/XB59 (ver. A1, A3) CL lectronic controller+ A501 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved. 6 Danfoss DHS-SCT/PL VD..D1.02