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
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