East of England Solar hot water Paul Bourgeois in the h S l - - PDF document

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East of England Solar hot water Paul Bourgeois in the h S l - - PDF document

May 08, 2023 421 likes •615 views

East of England Solar hot water Paul Bourgeois in the h S l Energy S Energy S aving Trust in the East aving Trust in the East Microgen Co-ordination Zero Carbon Britain Zero Carbon Britain S upply chain development and

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SLIDE 1

S l h Solar hot water in the East of England

Paul Bourgeois

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SLIDE 2

Energy S aving Trust in the East Energy S aving Trust in the East

  • Microgen Co-ordination

– Zero Carbon Britain Zero Carbon Britain – S upply chain development and support

  • ES

Tac’ s Climate Energy

  • ES

Tac s – Climate Energy

– Norfolk, S uffolk & Cambridgeshire f d h df d h d – Hertfordshire, Bedfordshire and Essex – Act on CO2 0800 512 012 free phone line – Energy, Transport, Water and Waste

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SLIDE 3

Why use solar technologies? Why use solar technologies?

  • S

un’ s radiation

  • 60%

compared to equator

  • Irradiation on 1 m2 (kWh)
  • 1,200 to 900 kWh

,

  • Domestic roof angles
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SLIDE 4

Different solar technologies? Different solar technologies?

  • Solar thermal hot water panels
  • Photo voltaic arrays

Photo voltaic arrays

  • Passive solar design

A ti l h ti

  • Active solar heating
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SLIDE 5

What is solar thermal? What is solar thermal?

  • S
  • lar thermal hot water not solar water heating
  • Hot water production in UK = 8%
  • Demand constant throughout the year
  • Useful contribution in non optimal months

p

  • Two types - Fully filled and Drainback
  • Direct system (open loop) - freezing

y ( p p)

f g

– Water used at the taps is circulated through the system

  • Indirect system (closed loop) – antifreeze solution

– Heat transfer fluid is used instead

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SLIDE 6

System Components System Components

  • Solar Collectors - flat plate panels or evacuated tubes
  • Hot water tank - extra heat exchanger

Hot water tank extra heat exchanger

  • Control Set - Control Panel, S

ensors, Pump

S f t S t

  • Safety Set - Pressure release valves, Expansion vessel
  • Connections - Copper or stainless steel flexi-pipes
  • (A-frame - for flat roof installations)
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SLIDE 7

Typical S ystem Typical S ystem

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SLIDE 8

How it works How it works

  • Converts solar radiation into hot water
  • Heating fluid and anti-freeze

Heating fluid and anti freeze

  • Pumped to heat exchanger

H t t t li d th t th t

  • Hot water to cylinder then to the taps
  • Summer - direct hot water
  • Winter - mains water pre-heater
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SLIDE 9

S

  • lar collectors

S

  • lar collectors

E t d t b

  • Evacuated tubes

– Direct flow – Heat pipe (vertical only)

  • Unglazed plastic collectors (uninsulated)
  • Unglazed plastic collectors (uninsulated)
  • Flat plate
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SLIDE 10

Building specific Building specific

  • Estimated hot water usage
  • The percentage of solar contribution to the

The percentage of solar contribution to the annual hot water load

  • Geographical location
  • Geographical location
  • Orientation
  • Inclination of roof
  • Type of collector

yp

  • Minimum ¾ m2 per person
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SLIDE 11

Savings & Costs Savings & Costs

  • Manufacturers savings 500 kWh per m2

At l t 50% l h t t d

  • At least 50%

annual hot water needs

  • More for electrically heated homes

y

  • Basic vented system £3,000 to £5,000
  • Plus access costs
  • ES

T field trials of 100 properties nationally

  • ES

T field trials of 100 properties nationally

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SLIDE 12

Maintenance Maintenance

  • Virtually no routine maintenance
  • No annual service
  • No panel cleaning

p g

  • Control panel diagnostics & warnings
  • Prolonged non use in summer fail safes
  • Prolonged non-use in summer - fail safes
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SLIDE 13

Quality and S tandards Quality and S tandards

  • MCS

– Microgeneration Certification Scheme g

  • Installation companies and products
  • Access to the proposed RHI payments
  • Access to the proposed RHI payments
  • REAL Assurance
  • Trading S

tandards – OFT schemes

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SLIDE 14

Renewable Heat Incentive Renewable Heat Incentive

  • Act of Parliament, Consultation ended, still being developed
  • S

cheme in place from June 2011 & grandfathered

  • 12% ROI all technologies except solar thermal @

6%

  • Deemed on small scale (calculated not metered)
  • Deemed on small scale (calculated not metered)
  • Applies to New Build and Retrofit. Audited by Ofgem
  • Payments yearly <45kW & quarterly >45kW
  • Proposed back-dated to 15th July 2009 if certificated installer
  • MCS up to 45 kW
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SLIDE 15

Proposed RHI payment Proposed RHI payment

Technology Scale Tariffs (pence/kWh) Tariff lifetime (years) Small Installations Solar thermal Up to 45kW 18 20 Medium Installations Solar thermal 45kW - 500kW 17 20

  • Typical system 3 m2 = 1,500 kWh deemed output

Typical system 3 m 1,500 kWh deemed output

  • 1,500 x £0.18 = £270
  • Indicative heating fuel saving = £50
  • Total annual saving = £320
  • Assumed payback = 11 years
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SLIDE 16

Domestic market Domestic market

LCBP d d A N 2009 LCBP grants awarded – Apr to Nov 2009

Technology Total ec

  • logy
  • tal

Air S

  • urce Heat Pump

37 Ground S

  • urce Heat Pump

30 Ground S

  • urce Heat Pump

30 S

  • lar Photovoltaic

86 S l Th l H W 135 S

  • lar Thermal Hot Water

135 Wind Turbine 12 Wood Fuelled Boiler System 8 Totals

308

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SLIDE 17

Frequently asked questions? Frequently asked questions?

  • Will I need planning permission?
  • Will I need Building Regulation sign off?

Will I need Building Regulation sign off?

  • Will the panels damage my roof?
  • Which type is best?
  • Which type is best?
  • Do they work with combination boilers?
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SLIDE 18

Thanks Thanks Questions?