CP2 - Surface water source heat pumps

A Client / Operator perspective

Context

Heating the National Trust Potential - Its more than mansions!

• 88 castles

• 300 mansions

• 2000 agricultural tenants

• 39 villages

• 29,000 buildings

• 3749 oil tanks

• 42,000ha of woodland

• 700+miles of coast• 2 Goldmines

61 pubs

Experience ? You name it. We are having a go

But………•It has taken the NT 121 years to

get this complex.•We were historically not a very

informed “Good” client

Common themes

• No clear brief and scope for projects.

• Reliant on external consultants who were learning at our expense.

• Consultants not technology agnostic.

• Oversized systems were the norm.

• Management implications not understood or considered

• Hybridising systems to suit budget.

• Performance of old building for conservation not understood, and no clear performance monitoring set.

As a client the simple fact that the intended audience of the

guidance includes “owners and operators” in order to set

minimum industry delivery standards.

Fills our finance, procurement and senior management with

confidence that risks have been identified and understood at the

feasibility stage.

Reputational Risk

Clear outline for owners role. Would have thought the project manager in liaison with heat pump supplier,

designer would ensure correct commissioning.

A3.2 Responsibilities

Plas Newydd – starting point

2009128,000ltrs of oil pa1500ltrs pd in winter1,200,000Kwh pa300,000kwh of electricity

Site audit

Specialist survey

Maintenance contract

Optimisation

BMS strategy

Overhaul boiler

Dynamic heat loss model

Hand dryer trial

Full biomass feasibility

Heat pump pre feasibility

Roof insulation

Staff training

Flange and valve insulation

Low heat dynamic model

Detailed M&E assessment and room by room heat loss

Heat pump full feasibility

Secondary glazing

Hand dryer rollout

LED lighting

50kw PV installation

Smart metering

Heat pump design and EIA

Sub metering, meter monitoring

Hydro pre feasibility

Staff training

Site re audit

New heat main and zonal design

Conservation LED lighting

Marine source heat pump installation

Ceramic stove

New heat main

Localised solar thermal

Improving shutters and curtains

Visitor centre heating – pellet ceramic stove

Fabric insulation – tea room

Energy Hierarchy at Plas Newydd

Secondary glazing yes we did!

- 33%Through efficiency

Stage 2: FeasibilityObjectives:2.1 To assess environmental impacts and benefits 2.2 To identify and quantify the most suitable surface water sources and the best method for energy exchange2.3 To determine what permissions are necessary to access the water and what implications this may have2.4 To determine heat pump location and source-side heat exchanger or abstraction and discharge details (including costs estimates)2.5 To accurately estimate peak and seasonal heating and cooling demands and profiles2.6 To agree suitable load-side flow and return operating temperatures, flow rates and control strategies2.7 To determine the requirement for monovalent or multivalent operation 2.8 To assess operation and maintenance needs and costs 2.9 To conduct a financial analysis in order to comprehensively evaluate the installation options2.10 To analyse risks and carry out a sensitivity analysis  Key support tasks: Review client brief Further pre-application discussions with statutory and regulatory bodies Prepare risk assessments Undertake third party consultations as required and any research and development

aspects Review and update implementation plan Develop:

sustainability strategy maintenance and operational strategy construction strategy health and safety strategy

 Information exchange to next stage (design team): Feasibility study

concept design including outline structural and building services design associated project strategies preliminary cost information

Final project brief All notes, actions and outcomes

Objective 3.5 – To accurately determine peak heating and cooling demands and seasonal

energy consumption profiles

For existing non-domestic buildings it will normally be the responsibility of the customer to define the peak heat demand that they wish to contract for and to provide an estimate of their annual heat energy consumption.

However this analysis should be with the close involvement of the SWSHP designer

Objective 4.1 – To reduce adverse environmental impacts of construction

Best practice

• Best practice would include the provision of large and easily readable posters fixed to the site hoardings to outline the nature of the works and the proposed carbon benefits.

• Best practice would include the use of the Civil Engineering Environmental Quality System (CEEQUAL) with a target to achieve Very Good or Excellent. BREEAM or LEED could also be used.

Real World

• Best practice would be to get a Royal Institute of Chartered Surveyors (RICS) certified quantity surveyor (QS) to produce an independent full

cost breakdown of the project• Employ an independent clerk of works in line with the duties, roles and

responsibilities described by the Institute of Clerks of works and Construction Inspectorate of Great Britain to check and verify works as

they are completed.

Stage 7: DecommissioningObjectives:7.1 To decommission the heat pump7.2 To decommission the source side Key support tasks: Produce decommissioning plan Engage with Environment Agency and other regulatory bodies

on processes of decommissioning and the level of requirements for site reinstatement

 Information exchange (to decommissioning team and regulatory bodies): Decommissioning plan Reports in line with F-Gas and other regulations Reports to Environment Agency and other regulatory bodies as

required

2.9.2 All analysis shall be conducted in accordance with accepted accountancy principals and cover an agreed period; up to 50 years for heat pump projects

• The costing in the feasibility study shall be based on realistic estimates to ensure sufficient funding is allocated. An appropriate contingency fund

(typically at least 25%) shall be allocated and clearly identified to cover unforeseen costs.

Who’s helped the NT at Plas Newydd

Castle HowardHeat Pump

Carbon TrustFunding for

dynamic modelling, options appraisal

School of Oceanographic SciencesSeabed surveys, temperature analysis. They have a boat!

HHALED Light Development

Local AuthoritiesMaintenance contracts

Good EnergyEnergy Trading advice

Centre for Alternative Technology

Hub, Students and specialists

RNLIWorking with the sea

and metallurgy

Poole Tidal Energy Partnership

Got us to think

Caernarfon Harbour Trust

Working with the sea and navigation authority

The Crown EstateFacilitation

British ports AuthoritySea Water Source

Heat pump

English HeritageSecondary glazing

and curtains

NRWAdvice and guidance

Assessment of performance

Average Cop = 4.69 Average SPF = 2.7