4.1 10 year generates savings: there are several ... · tco 2 10 year cost saving item measure...

Summary 1. Opportunities

The table below summarises the most appropriate opportunities for your school. As such, it does not

contain all of the opportunities identified in section 3. Furthermore, for some opportunities, the individual

savings will be less than that identified in section 3 as this summary considered the sequence in which

the projects are likely to be implemented. For example, a fabric measure may save 10% of the gas

consumption of the site. However, if a new boiler (saving 20% of the gas consumption) is installed prior

to the fabric measure then the saving from the fabric measure will be less[K1].

The financial savings are the net annual savings and include energy cost savings along with other

additional operational costs or savings.

The table below shows the actions associated with the immediate opportunities.

2. Site Overview

The school is comprised of 5 block as shown in the figure below. The oldest building (Block 004) was

built in 1850. Known within the school as 'Cherry' this stone building is now in use as two classrooms,

with various small extensions including a former air raid shelter housing the pottery kiln and a lean-to

music space. A new adjacent single room (Block 005)was added, probably in 1960 possibly later;

ID Measure Owner

Implementation

category Financial tCO2e Elec Gas

Cost

Required

Payback

period

£ tonnes kWh kWh £ Years

1 Heat controls adjustments Careaker 0-6 months £1,692 10 0 £56,400 £0 0.0 3% £16,920

2 Air conditioning adjustmentsCareaker 0-6 months £2,369 14 26,320 £0 £0 0.0 4% £23,688

3 Lighting upgrades SMT 6 months - 1 year £3,865 23 42,948 £0 £8,012 2.1 7% £38,653

4 Heating Controls Upgrade SMT 6 months - 1 year £1,644 10 1,344 £50,760 £4,000 2.4 3% £16,438

5 Awareness and Metering Eco schools6 months - 1 year £1,650 10 11,280 £21,150 £3,000 2.6 3% £16,497

6 Solar PV SMT 1 year - 3 years £7,514 18 33,396 £0 £99,750 8.7 5% £75,142

8 Fabric Roof B&NES 1 year - 3 years £1,419 9 0 £47,305 £34,060 24.0 3% £14,192

9 Fabric Window B&NES 1 year - 3 years £2,478 15 0 £82,600 £29,736 12.0 5% £24,780

Total £22,631 108 115,288 258,215 £178,558 7.9 33% £226,309

Annual Savings

% of

site

tCO2

10 Year

cost

Saving

Item Measure Description Action

1 Heat controls adjustments

There are several adjustments that can be

made to the existing boiler controls that will

generates savings:

Reducing weekend running time Saturday from

09:00-18:00 to 09:00 to 13:00

Ensure heating systems are turned down to

fabric protection settings during the holidays.

Reduce Thursday evening from 22:00 to 18:00

Reduce boiler set point from 85-75deg

1-Adjust times zones as suggested

2-Reduce boiler set point in increments and

monitor progress

2

Air conditioning

adjustments

The set points for the airconditioing heating

are set too high at 28deg. This should be

reduced between 18deg-20deg .

Also, there is no time clock set for these units

which could mean they run when the area is

not being used. Set time clocks up to macth the

occupation hours of the area.

1-Adjust times zones and heating set points

as suggested

2-Set upper and lower limites to the set

points

4.1

0

50

100

150

200

250

09-10 10-11 11-12

kWh/m2

Electricity

Heat

SW AverageElec

SW AverageGas

known as 'Elm' it is a lightweight prefabricated structure housing the ICT suite of computer servers and

around 30 PCs with associated peripherals. In 1991 another larger prefabricated building (Block 002),

also supplied by 'Rollalong', was added at the southern edge of the higher level; known as 'Beech' it is

currently used as two classrooms. In 1996 'The Log Cabin' (Block 001) was installed; it provides the

main entrance,

reception and

administration areas,

four classrooms, a

toilet block, and

ancillary space. A

recent glazed infill to

the North provides a

staff area. 'The New

Hall' (Block 012)

was added at the

lower level in 2003,

followed by 'The

New Block' (Block

013) in 2006, used

mainly for teaching

infants. There is no

vehicle parking on

the site and the only

vehicle access, for

deliveries, maintenance and emergencies, is via a gate at the lower level.

3. Energy consumption and cost analysis

In 2011/12 your total energy spend was £15,543 and your carbon emissions were 100 tonnes CO2.

Your energy spend per pupil was £130/pupil and spend per meter square was £7.05/m2. The following

graphs show your kWh of energy used per square meter (left graph) and the resultant carbon emissions

per square meter (right graph). It is split into electrical energy and heat energy (gas and/or oil) but does

not include any data on renewable energy. You will see that electricity is more carbon intensive per unit

than Gas.

The table below shows the ranking of the school for four metrics compared with the other infant and

primary schools in the region. Note: a low in number or ranking indicates a better performance.

0.00

10.00

20.00

30.00

40.00

50.00

09-10 10-11 11-12

Kg CO2/m2

Elec CO2

Heat CO2

SW AverageElec CO2

SW AverageHeat CO2

4. Carbon and Energy Management practices

Key ECO schools actions

Improve awareness:

o Announce campaign in Friday assembly. Tell everybody about target to reduce

electricity use by 10%.

o Show Action Aid ‘PowerDown’ video to explain WHY saving electricity is important.

Improve visibility of energy consumption information. Using existing AMR data:

o Weekly: review existing AMR data weekly to identify and investigate abnormal

consumption patterns.

o Monthly -With the ECO Schools team review monthly energy performance reports

and discuss and investigate any significant changes.

o Adhoc- use AMR to verify savings of projects that have been implement both

physical and awareness such as switch-off campaigns

o Work with Eco schools team to see how the energy data can be included into

curriculum content.

The graph below presents the individual Energy Management status of your school based on a

qualitative assessment covering 11 themes of carbon management. These themes were devised

specifically for the purposes of this project, building on similar assessment tools such as the Carbon

Trust’s carbon management matrix. (A score 0.5 is low and 8 is high).

Introduction This report was prepared by Verco for [Name of School] on behalf of Bath and North East Somerset

(B&NES) as part of the All schools energy assessment project. It provides a summary of energy reduction

opportunities for a secondary school, following an energy audit carried out by Verco on 22/01/13. The

Energy Performance section provides an overview of the school’s historical and current energy

consumption performance along with a qualitative review of the energy management practices at your

school. In addition it provides an outline business case that demonstrates the drivers for and quantifies the

benefits of improving energy efficiency. In addition, the annexes provides; more detail of the opportunities

identified, Eco-Schools supporting information and some practical advice of what your school can do now

to reduce its energy consumption now.

Energy management performance

The two figures below show the breakdown of energy cost and carbon emissions in 2011/12 for each fuel

type.

The two charts below show the energy consumptions figures for electricity and gas. The gas consumption

graph shows actual consumption and degree day corrected consumption. This degree day corrected data

provides a fairer comparison as it takes temperature conditions that will impact on the gas consumption.

AMR data analysis-Electricity

The figures below represent the electricity consumption figures at half hourly intervals through the day.

The 1st represents an average for a year of each half hour interval throughout the day. This chart also

compares years’ worth of data. The red bars are 2010/11 and the green represent 2011/12. This particular

chart shows that there has been a slight increase in electricity consumption between 09:30-21:30

The next two charts show the average for the last year, the chart below shows the consumption during

weekend and school holidays. As you can see the more electricity is being used during the day than at

night when the school is closed.

This is a sample of the Energy Assessment Report using dummy data

The chart below shows similar information to the chart above but during the term time weekdays. From this

you can see the how the night-time usage relates to that of the day. Also, the long tail off towards the end

of the days suggests some day time energy consuming equipment is running until 22:30.

The chart below shows the average daily total for each day of the week for the whole. It is clear that the

weekend usage is greater than ½ of the a normal weekday.

The chart below shows the total weekly consumption for every week of the year, with the holiday usage

highlighted in red.


0

5000

10000

15000

20000

25000M

on

31

-Oct

-11

14

-No

v-1

1

28

-No

v-1

1

12

-De

c-1

1

26

-De

c-1

1

09

-Jan

-12

23

-Jan

-12

06

-Fe

b-1

2

20

-Fe

b-1

2

05

-Mar

-12

19

-Mar

-12

02

-Ap

r-1

2

16

-Ap

r-1

2

30

-Ap

r-1

2

14

-May

-12

28

-May

-12

11

-Ju

n-1

2

25

-Ju

n-1

2

09

-Ju

l-1

2

23

-Ju

l-1

2

06

-Au

g-1

2

20

-Au

g-1

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03

-Se

p-1

2

17

-Se

p-1

2

01

-Oct

-12

15

-Oct

-12

Electricity Consumption By Week Throughout Year (kWh/week) kWh Holiday

kWh Term Time


Energy Management Assessment

The graph below presents the individual Energy Management status of your school based on a qualitative

assessment covering 11 themes of carbon management. These themes were devised specifically for the

purposes of this project, building on similar assessment tools such as the Carbon Trust’s carbon

management matrix. (A score 0.5 is low and 8 is high).

The figures shows, your school’s strongest area is involvement of pupils whilst on of the weakest area is

policy. Creating and adopting a formal policy and strategy is an important first step. The self-assessment

matrix can be used to assist you. You could review it with the governors and management team and set

targets for the position you’d like to achieve in 3 years. 1 year and 3 year target for thet level you’d like to

achieve in each category.

Energy performance opportunities

The two tables below summarise the opportunities identified for your school. The first shows quick wins or

projects that require little to no investment. The second table lists the long term opportunities that require

larger investments[JE2].

Annual Savings

ID Measure Financial tCO2e Elec Gas Cost Required

Payback period

% of site tCO2 £ tonnes kWh kWh £ Years

1 Heat controls adjustments £1,692 10.45 0 56,400 £0 0.0 3.2%

2 Air conditioning adjustments £2,369 13.81 26,320 0 £0 0.0 4.2%

3 Heating Controls Upgrade £1,644 10.11 1,344 50,760 £4,000 2.4 3.1%

4 Awareness and Metering £1,650 9.84 11,280 21,150 £3,000 2.6 3.0%

Quick wins/low investment totals £7,354 44.20 38,944 128,310 £7,000 1.0 13.5%

% of site total 19% 13% 10% 18%

Annual Savings


ID Measure Financial tCO2e Elec Gas Cost Required

Payback period

% of site tCO2 £ tonnes kWh kWh £ Years

5 Solar PV £7,514 17.52 33,396 0 £99,750 8.7 5.3%

6 Biomass boilers £1,032 55.94 0 302,000 £41,185 9.0 17.1%

7 Fabric Roof £1,419 8.76 0 47,305 £34,060 24.0 2.7%

8 Fabric Window £2,478 15.30 0 82,600 £29,736 12.0 4.7%

9 Fabric Wall £1,983 12.25 0 66,114 £115,200 58.1 3.7%

10 Lighting upgrades £3,865 22.53 42,948 0 £8,012 2.1 6.9%

Longer term / larger investments totals £18,292 132.30 76,344 498,019 £327,942 17.9 40.4%

% of site totals 48% 40% 20% 71%

The financial savings are the net annual savings and include energy cost savings along with other additional

operational costs or savings. This operational cost could include additional savings e.g. if double glazing is replacing

crittall windows, there will be a saving on not needing to repaint the existing crittall windows. However, it could

include additional costs if the measure suggested requires more annual maintenance than what is being replaced, a

biomass boiler installation is a typical example of this.

Action plan

Outline Business Case[JE3] Cumulative annual cost reduction

The chart below shows us the potential savings or avoided cost from a reduction in energy consumption

(Target Cost) at your school over a 5 year period against the alternative of doing nothing (BAU Cost).

This analysis illustrates the impact of reducing your energy consumption with the measures identified in

the executive summary over a 5 year

period. The analysis factors the

predicted energy price increase at 5% a

year, hence the BAU cost, increases. It

is worth noting that even with the

predicted reduction in energy; the

target cost line is only slightly lower in

2017 than at 2012.

The cumulative cost

reduction/avoidance over the 5 year

period is: £99,900 and the annual figure

by 2015 is approximately £34,000[K4].


Payback comparison

The following charts show samples of payback analysis.

The charts to the left show illustrates the payback period for each project. The payback period refers to the period of time required for the return on an investment to "repay" the sum of the original investment. For example, a £1,000 investment which returned £500 per year would have a two year payback period. The lower the payback the better

The next chart shows similar information but on the secondary y axis the cumulative savings are shown. This refers to the total annual savings of projects if the projects where implemented in order suggested in the chart. e.g if you were to implement all the projects with a payback of 3 years (all project up to and including the awareness and monitoring you would expect to save £12,000 / year.


This chart is similar to the one above but the cumulative annual financial savings are replaced with cumulative annual CO2 savings. This is useful if you have a total CO2 savings target and you can use this to select which are the most cost effective projects that will achieve the target.

This is another iteration of the previous two charts but the savings have been replaced with cumulative capital cost.

.


Annex 1: Energy management opportunities report This annex includes a list of all opportunities identified for the school with quantified energy

and cost savings along with estimated cost to implement the measure. It also provides a

brief description of the opportunity and suggests some next steps in the action required

section.

[Name of School]


Annex 2: Eco-Schools Energy Action Plan This table provides some suggested actions that could be used in the eco schools action plan for the school. In many instances the actions are

linked observations made by the surveyor during our visit.

Observation/theme Possible action

Lights left on Unannounced spot checks on classes on a different day each week. Award for class that’s done best.

Limited visibility of energy consumption information

Weekly: review existing AMR data weekly to identify and investigate abnormal consumption patterns. Monthly -With the ECO Schools team review monthly energy performance reports and discuss and investigate any significant changes. Adhoc- use AMR to verify savings of projects that have been implement both physical and awareness such as switch-off campaigns Work with Eco schools team to see how the energy data can be included into curriculum content.

General lack of awareness and engagement in energy or environmental issues

Announce campaign in Friday assembly. Tell everybody about target to reduce electricity use by 10%. Show Action Aid ‘PowerDown’ video to explain WHY saving electricity is important.


Annex 3: Energy Management support This annex provides a list of good housekeeping measures that could be implemented now away without any additional expense and within the

resources of the school.

Specific Actions

4.1 10 year generates savings: there are several ... · tco 2 10 year cost saving item measure...

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