The heat supplier badenovaWärmeplus intends to use industrially generated process waste heat for one or more large-scale heat pumps on the premises of Cerdia GmbH in order to feed the thermal energy into a district heating network. Further descriptions can be requested from doreen.scholtholt@badenova.de.

This tender comprises the lot: Large heat pump(s)

In the industrial area north in Freiburg im Breisgau, a new district heating energy center of badenovaWÄRMEPLUS is being built on the premises of Cerdia Produktions GmbH. With one or more heat pumps, a thermal output of approx. 12MW-16MW is generated. The heat source is corresponding industrial process water, the heat of which is fed into the existing district heating network with the heat pump(s) in the heat sinks at up to 85°C at approx. 7 bar(g) pressure. Operating costs are reduced either by means of a heat-guided mode of operation or by means of a current-guided mode of operation. For example, electrical energy costs are reduced by charging the heat pump (approx. 1000m3) depending on the electricity costs, or an operating combination is also generated that additionally installs heating condensers. These will each be fed with approx. 7 MW of low-pressure steam from the existing CHP plant. The grant notification for the implementation of the Freiburg-West heating network within the framework of the Federal Funding for Efficient Heating Networks (BEW) has already been issued.

The commissioning of the entire plant is expected to be completed in Q3 2025.

Scope of the measure:

Production with quality acceptance; Delivery; Installation, commissioning and trial operation as well as system handover of one or more heat pumps with corresponding systems and service availability.

Process engineering:

• Heat source: process water of the industrial plant

• Thermal power: 12-16 MW

• Propulsion: Electric motor

• Service life: 80,000 operating hours with corresponding maintenance intervals

• Number of starts/stops: approx. 400 per year / (6000 start/stops on lifetime)

• Heat sink: // Flow 75°-85°C // Return 60°- 50°C as a function of the outside temperature

• Heat source: Min.: 35°C Nominal: 39°C Max.:53°C by means of secondary water cycle (water quality according to AGFW510) 390 m³/h

• Refrigerants: According to European legislation (requirement BEW funding): GWP <400)

Ausführungsgrundlage:

• The basic diagram of the energy centre with heat pump must be requested from doreen.scholtholt@badenovanetze.de

Technical design:

• Electrics: Complete electrical equipment with all protective devices and switches according to EN 60204; DIN EN 61439-1; EN378 and Machinery Directive

• Control and control technology:

Independent PLC with monitoring, control and regulation as well as interface to the central control of the thermal power plant. Display values combined with PPS numbers and control screens. Power control according to specific external operating parameters

• Capacity-controlled semi-hermetic or hermetic compressor(s)

• Refrigeration circuit with heat exchangers and evaporators as well as complete I&C technology

• Pipes and connection flanges

• Machine frame galvanized or painted

• Galvanized steel construction

• Plastic-coated metal control cabinets and control front

• Documentation: CE Machinery Directive and European Printing Regulations; PPS Directive; Drawings in 3D as well as 2D with measurements; German language

Period:

• Preliminary planning with offer: CW47/2023 – CW3/2024

Specification of the size of the trade as well as the

loads and position of the main cutting

and current connected loads

• Implementation planning: Beginning of Febr./2024 – Sept./2024

•Desired:

Delivery, installation and commissioning: CW36/2025