B&NES Energy at Home schemeNo.1 Royal Crescent

Footprint?

People and place fully alive

Charles Curnock 28th July 2015

Roman temple, three churches, a monastery and a convent

Community – local, national

and international

A sense of place

Footprint - what are the main needs?

• Stabilise, repair and refurbish the Abbey floor

• Use heat from the out-flow of the Roman Baths for a new heating

system

• Provide flexible seating for the nave

• Reduce the impact on the fabric of large numbers of visitors and events

• Provide the necessary support spaces and ancillary services required

by Bath’s most significant building and venue

• Improve the interpretation of the nationally significant heritage

…...detailed in the 50 page Statement of Need…….

BATH ABBEY

PAROCIAL CHURCH COUNCIL (PCC)

Chair, Edward Mason

PCC Members

Churchwardens

Clergy Team

APPEAL BOARD Chair, Colin Skellett

Jeremy Key-Pugh

Lady Evelyn Strasburger

Trevor Osborne

Matthew Butler

Margaret Roper Nick Hood

John Everitt

Richard Hall

Robert Hamilton

Valentine Morby

FOOTPRINT EXECUTIVE

Edward Mason

Charles Curnock

Laura Brown

Sue Criddle

PROJECT ADVISORY PANEL

Chair, Sir Peter Spencer

English Heritage Commissioner

Project Management Advisor

Interpretation Advisor

Head of B&NES Heritage Services

Representatives of:

Diocesan Advisory Committee

Churches Building Council

Parochial Church Council

CDM

Roy Short Gleeds

Interpretation

Consultant

to be named

Quantity Surveyor

Duncan Ball

Victoria Smith

Synergy Group -

Bare Leaning and

Bare

Structural Engineer

John Mann

Spencer Fereday

Mann Williams

Architects & Design

Team Leader

Geoff Rich

Fergus Connolly

Matt Somerville

Lee Holcombe

FCB Studios

Retail and

Catering

Consultants

to be named

M & E

Engineer

Amy Wade

Neil Francis

Simon Wright

Buro Happold

Surveyor A B Surveys

Performance

Carr & Angier

Acoustics

Fleming & Barron

Archaeology

Kim Watkins

Historic Furniture

and Architecture

Arch History Practise

Fundraising

Valentine

Morby

Lighting Designer

Mark Sutton Vane

Sutton Vane

Associates

Design

Team

Other

Consultants

STATUTORY AUTHORITIES Diocesan Advisory Committee

Church Building Council

B&NES Council

English Heritage

Georgian Group & Victorian Society

Ancient Monument Society

Society for Protection of Ancient Buildings

STAKEHOLDER GROUPS Friends of Bath Abbey

Abbey User Groups

B&NES Council

Bath Preservation Trust

Urban Regeneration Panel

Abbey Residents Association

Furniture

Designer

Luke Hughes

Energy

Carbon Catalyst

Group

Buro Happold

Comfort and efficiency

Heat Emitter - Options

16-19˚C

Comfort and efficiency

35˚C

45˚C40˚C

A renewable heat source

Heat Pump Serving Other Buildings & Uses

Roman Baths potential

nighttime background

heating (daytime pre-

heating of other systems?)

Bath Abbey underfloor

heating and

background trench

heating

Other buildings underfloor

heating, air heating, and

possibly hot water pre-

heating

300 kW total

150 kW heat

pump

300 kW total

150 kW heat pump

450 kW total

100 kW heat pump

The temperature drop of hot spring water in the Great Drain will depend on the quantity of

energy removed by the heat pumps. The temperature at the preferred abstraction point is 35-

40°C. Removing say 250-300kW of energy to serve the Abbey and other buildings will equate

to a modest temperature drop of 6-7°C. The final size of heat pumps and hence temperature

drop will be subject to detailed load analysis.

Location 1 – Roman

Baths Kings Spring at

source temp 43-45°C &

flow rate average 37

m3/hr

Location 2 – Roman

Baths Great Drain

temp 38-40°C & flow

rate assumed 37 m3/hr

Location 3 – Parade Gardens

Great Drain temp approx 37-

39°C summer & 35°C winter

with flow rate assumed 37

m3/hr

Location 4 - Parade

Gardens Great Drain

outlet to River Avon and

mixing with river water at

temp 2-20°C

Hot Spring Water Temperatures & Abstraction Options

~

45°C~

35°C

Preferred heat abstraction

location due to proximity to

Roman Baths and Bath

Abbey

Heat Pump Principle to Increase Use of Hot Spring Water

A heat pump is a device that transfers heat energy from a relatively low temperature to a higher

temperature. Heat pumps can take their source heat from water or the air and use a refrigerant circuit

with electrically driven compressor to drive the process. Heat pumps are very efficient and can greatly

increase the usability of heat in building heating systems, especially where higher heat outputs are

required.

35°C 33°C 25°C

50°C

35-40°C 28-

29°C

Hot spring water ‘open loop’

system including pump, filter

and heat exchanger (HX)

Blending vessel and

electric heat pump

(HP)

To Abbey and other building

heating systems ‘closed

loops’(note hot spring water does not

circulate through building as this is

separated by heat exchanger)

Great Drain 6-7°C temp

drop with 250-300kW of

heat energy abstracted

HPHX

Typical floor standing electric heat pump unit.

Example manufacturer Dimplex 50-130kW

unit. Heat output up to 60°C, but preferably

<50°C for improved efficiency. Maximum

source water temp 25°C (ie. hot spring water).

Dimensions 1350w x 775d x 1890h mm.

Multiple units to suit space availability and for

efficient control.

250-300kW

37m3/hr

Footprint – Building work to date

• Trial excavations – early 2011 and early 2012

• Chandeliers overhaul – early 2013

• Floor trial repair & south west entrance renewal – late 2013

Skidmore designed chandeliers as installed by George Gilbert Scott in about

1870