heat networks code of practice
TRANSCRIPT
Heat NetworksCode of Practice
Heat Networks
Heat Network Types
• Single Buildings
• New developments with multiple buildings
• Large energy users with multiple buildings
• Towns and cities
Future uptake of Heat Networks
• Potential to increase proportion of heat from heat
networks from 2% up to 14-43% by 2050.
• Seen as lowest cost option for meeting the energy
trilemma
• Stronger support from Government – Future of Heating
• Stronger policy support
• HNDU formation and funding for feasibility studies
and £320m for scheme development
• Scotland Heat Policy Statement
• 1.5TWh & 40,000 homes on heat networks by 2020
• Heat Network Partnership, Support Programme and
District Heating Loans Fund
Challenges for Heat Networks
• High capital costs and often relatively low levels of financial returns
• High risks
• Heat is an unregulated market so consumers not as well protected
• Lack of understanding and skills in key groups:
• Clients (developers, housing associations, local authorities)
• Engineers
• Commissioning agents
• Contractors
• Management agents
• Clients
Heat Networks Code of Practice
• Relatively limited experience in the UK
• Lack of established industry standards
• Address the problems being identified in some
new heat networks
• Formalise a design approach for all stages
• Provide a standard specification for
procurement bodies
• Set minimum standards for designs
• Provide a basis for certifying approved
professionals
• Improve consumer confidence in heat networks
• Support increase in heat network projects
Addressing the problems
• High heat losses
• High operating temperatures and high return
temperatures from connected buildings
• Overestimated heat demands, leading to oversizing of
plant, pipework and
• Issues with overheating within communal areas
• Customers facing higher bills
• Designers using inappropriate standards
• Poor commissioning
• Designs not optimising system (testing options against
lifetime performance and efficiency at part loads)
• Poor consumer experience
£CAPEX& £OPEX
CO2SAVINGS
Addressing the problems
Addressing the problems
Improving heat network viability
• Efficient system design can significantly reduce capital
and operational costs meaning lower costs to users,
higher financial returns and higher asset value.
• Capital cost savings:
• Avoiding oversized plant
• Optimising pipework lengths and sizes
• Operational cost savings:
• Reduced cost of heat losses
• Improved primary plant operation
• Reduced pumping costs
• Reduced maintenance fees and increased lifespans
Structure of the Code of Practice
Key goals of the Code of Practice
A: Correct sizing of plant & network
A: Correct sizing of plant & network
B: Low heat network losses
B: Low heat network losses
C: Low flow & return temperatures
D: Variable flow control principles
D: Variable flow control principles
E: Optimise low carbon heat sources
F: Manage risks & deliver quality
Efficient Heat Networks
Stage 1: Preparation and Briefing
Stage 1: Preparation and Briefing
Stage 2: Feasibility
Stage 2: Feasibility
Stage 3: Design
Stage 3: Design
Stage 4: Construction
Stage 4: Construction
Stage 5: Commissioning
Stage 5: Commissioning
Stage 6: Operation & Maintenance
Stage 6: Operation & Maintenance
Stage 7: Customers
Objectives and minimum standards
Initial use and feedback• Formally launched in July 2015
• Starting to see the Code of Practice used inspecifications and tenders
• Some clients have modified terms andrequirements to align with the HNCoP
• Possible requirement of future funding?
• Being used to define the industry standard andsupersede old and inappropriate standards
• CIBSE training programme:
• Over 200 people undertaken thecertification and introduction courses
• Around 100 officers from Local Authoritiesfunded by HNDU have received training
Next steps• CIBSE working group collecting and
assessing feedback from the industry(Code requirement 1.1.4) –www.cibse.org/CP1feedback
• Document will be updated andminimum standards will develop
• Formalise checking and verificationprocess
• Potential for further supportingguidance in specific areas
• Potential for rating scheme in thefuture