DSE FLEX is a compact substation platform designed for indirect district heating with up to 3 circuits with possibility to make combinations between modules if more circuits are required.
Maximum capacity is determined by temperature, allowable pressure drops and local regulations. HE 560 kW, DHW 590 kW. It is an exclusive solution designed to optimally fulfill specific requests and stringent requirements for district heating. Only available on request.
The packaged plate heat exchanger will consist of a fully assembled and pressure tested, skid mounted unit
Connections shall be screwed up to DN50, flanged at DN65+
The unit shall include pressure and temperature gauges, strainers, control valves, energy meters, isolating valves as per the schematic detail provided
Unit shall include a controller with temperature sensors as per the controller specification
Unit shall be pressure tested to PED standard, and capable of meeting the required max working and test pressures
Danfoss DSE Packaged Plate Heat Exchanger Range
Key Components: Heat Exchanger
The heat exchanger shall be brazed (EN 1.4404) or gasketed (AISI 304) depending on system requirements
Maximum pressure loss for the heat exchanger should ensure turndown ratio as required by the system. Suggested minimum pressure loss is 50 kPa
Danfoss Sondex range Controller
Controller must be suitable for the application and have a defined control strategy to deal with all components on the heat exchanger substation
Controller must use a temperature sensor on the primary flow, and a return temperature sensor on the secondary return, to maximise the performance of the primary system, whilst delivering the secondary flow temperature
Controller must have a safety switch off, to prevent overheating of the secondary system, in the event of system failure
Controller must include motor protection and motorised valve exercise, to prevent damage or blockage in the control valve
Control valve outputs are to be modulating via 0-10V or 3-point signal
Controller must have the ability to take in an M-bus signal from the meter, and display the consumed and instant energy usage, as well as flow rate and temperatures
Controller must have the ability to take in an external input
BMS must be able to link to the controller via Modbus or similar protocol
Controller must have a remote access portal to allow the system owner to access key performance data and amend settings
Danfoss ECL 310 Motorised Control Valve
Valve shall be pressure independent type
Valve must have an authority of 1 at all settings
Flow shall be set by limiting the stroke, to ensure full authority at all settings
PICV must have a control ratio of 1:1000
Actuator shall be suitable to be controlled by the specified station controller and be manufactured by the same manufacturer as the PICV
Flow measurement must be possible on the PICV, to ensure accurate commissioning
Valve shall be capable of closing at least 6 Bar differential pressure
Control Valve characteristic shall be adjustable, to mirror the characteristic of the heat exchanger
Danfoss ABQM with AME actuator
Energy Meters
Energy meters must be ultrasonic, MID approved class 2
The packaged unit must allow for any required diameters before and after the meter
Meter must have a Qi:QP ratio of 1:100 or better
Meters are to be capable of being read using the m-bus protocol
Danfoss Sonometer 30/3500 range
Isolation Valves
Must be fully lugged butterfly type
Leakage must be zero visible
Body must be cast with stainless steel disc, and EPDM liner
