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Senior Mechanical Design Engineer (Renewable Systems)Outsource Construction Ltd • Charing Cross, Greater London, United Kingdom
Senior Mechanical Design Engineer (Renewable Systems)

Senior Mechanical Design Engineer (Renewable Systems)

Outsource Construction Ltd • Charing Cross, Greater London, United Kingdom
4 days ago
Job type
  • Full-time
Job description

Job Description



Is this the next step in your career Find out if you are the right candidate by reading through the complete overview below.

Position: Senior Mechanical Design Engineer (Renewable Systems)


Location: London/ Hybrid


Salary: £75,000 - £90,000




We are looking for a specialist Mechanical Design Engineer to lead the transition from fossil fuel combustion to Large-Scale Heat Pump Technology. You will be responsible for the "physics" of the system—ensuring that high-capacity heat pumps are integrated into hydronic circuits that actually deliver on their efficiency promises.




  • Core Technology Focus1. Air Source Heat Pumps (ASHP)Cascade Systems: Designing multi-unit ASHP arrays for commercial peak loads.


Defrost & Ambient Logic: Managing acoustic mitigation, airflow requirements, and defrost cycle impacts on system continuity.


Bivalent Integration: Designing systems that integrate ASHPs with existing LTHW or backup heat sources.


2. Ground Source Heat Pumps (GSHP)Array Design: Coordinating borehole heat exchangers (BHE), horizontal loops, and thermal conductivity testing.


Ambient Loops: Designing 5th Generation heat networks and "sharing" energy across multi-user sites.


Passive Cooling: Leveraging ground temperatures for high-efficiency cooling integration.






  • 3. Hydronic Architecture (The "Engine Room")Low-Temperature Hot Water (LTHW): Designing for Heat Pump efficiency (e.g., 45°C flow / 35°C return).


Buffer & Separation: Precise sizing of buffer vessels and Low-Loss Headers to prevent short-cycling and maintain hydraulic separation.


System Balancing: Specifying PICVs and variable-speed pumping to ensure optimal mass flow rates.


Key Professional DutiesDetailed Modeling: Using IESVE or Hevacomp to ensure heat loss calculations meet BS EN 12831 standards.


BIM Coordination: Utilizing Revit MEP for 3D spatial coordination of complex plant rooms.


Technical Compliance: Ensuring all designs meet CIBSE CP1 (Heat Networks) and MIS 3005 (MCS) standards.


Candidate ProfileTechnical Background: Degree-qualified (BEng/MEng) with a deep understanding of thermodynamics.


Professional Status: CEng or MCIBSE preferred. xwwtmva


Experience: You must have a proven track record of designing ASHP or GSHP systems—not just supervising them, but performing the actual hydronic and thermal calculations.



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Senior Mechanical Design Engineer (Renewable Systems) • Charing Cross, Greater London, United Kingdom

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