Standard Heat Exchangers Stations Type DSE

Substation

• 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