Impact of energy management software on the improvement of energy performance in public buildings

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Impact of energy management

software on the improvement of

energy performance in public

buildings

Prof. Dr Velimir Čongradac Faculty of technical sciences, Novi Sad, Serbia

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Introduction

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In 2007 the European Commission set a new

goal for Europe’s future

20%

20%

Greenhouse gas emission

Efficient usage of energy in public and

private sectors

Production of energy from renewable

energy sources

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Energy management software

importance

 Today, many efforts are oriented toward fulfillment of these goals

 Among the other actions and techniques, during the last few decades it is notable more and more significant usage of energy management software solutions

 Energy Management Software (EMS) is a general term and category referring to a variety of energy-related software applications which may provide utility bill tracking, real-time metering, building HVAC and lighting control systems, building simulation and modeling, carbon and sustainability reporting, IT

equipment management, demand response, and/or energy audits. Managing energy can require a system of systems approach[1]

 Energy management software often provides tools for reducing energy costs and consumption for buildings or communities. EMS collects energy data and uses it for three main purposes: Reporting, Monitoring and Engagement[1]

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TEDS4BEE project

 One example of EMS solution is EMMOS (Energy Management and Monitoring Operational System) Digital Service, which is capable to collect, store and analyze all building data that influence energy consumption (temperature, humidity, CO2, lighting, occupancy etc.)

 EMMOS has been tested within the Test of Digital Services for Buildings Energy Efficiency (TEDS4BEE) - a Project funded by the Competitiveness and

Innovation Programme (CIP) of European Commission, which has gathered the consortium consisting of 12 companies from 7 European countries (United Kingdom, Ireland, Portugal, Spain, Italy, Serbia and Poland)

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TEDS4BEE project

 Consortium members was organized in 5 clusters  Within the TEDS4BEE, EMMOS was implemented in 16 buildings with different climate conditions and uses

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EMMOS features

Data collection: different

ways of collecting data. It includes a data repository for multiple buildings and

contracts and it allows to storage energy usage data and other variables

Data analysis: the web oriented digital services

provides information related to the building and the

parameters that influence their energy performance

User configurable

dashboard: each user can configure his own dashboard, depending on his needs and user role

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EMMOS features

Web-oriented: unique web

repository for multiple buildings and contracts which stores all relevant energy data

Various target users: ESCOs, building managers, stakeholders, construction and maintenance companies etc.

Reports: decision-making oriented and personalized

Benchmarking building to building

(b2b)/to n-building (b2n): it allows comparison and diagnosis of two buildings/N-buildings

Projected energy (PE)

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Operation activities

 Service work was conceived as repeatable cycle of several steps:

Data collection and analysis: for each pilot building, a set of measurable

monitored points (e.g., energy source consumption, outdoor temperature,

occupancy, etc.) are defined and continuously collected by EMMOS server. At the end of each month, reports showing various information are generated

Creating the energy optimization plan: Based on EMMOS reports, users create a

set of possible actions that could bring optimization to the energy consumption

Plan proposition: when plan containing a set of actions is created, it is presented

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Operation activities

Energy conservation actions: once possibilities for energy optimization are

recognized, building managers and technicians start to plan and implement the actions that should lead to better energy performance

Results analysis: After all approved actions are implemented and finished, a new

set of EMMOS reports are generated (based on new data) in order to obtain information about the real impact of conducted actions

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Energy conservation actions

 Energy conservation actions were based on PDCA (plan, do ,check, act) methodology

 All steps of PDCA methodology are completely incorporated in

previously explained operation activities

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Energy conservation actions example –

Emergency center

 One of the buildings that has

participated in TEDS4BEE project is Emergency center, Novi Sad

 Finished in 2010., Emergency

center is the first medical facility in Serbia which is housed in a fully computerized building (access

control, video surveillance,

property management, building automation etc.)

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Energy conservation actions example –

Emergency center

 An example of corrective actions produced with this methodology on Emergency center Novi Sad is shown below:

PLAN DO CHECK ACT

Energy consumption

reduction Root cause analysis Action Status Effect confirmation New actions Turning off

ventilation fans during night.

Lack of time schedule

for fans work. Ventilation fans work schedule. Completed.

Reduction of electricity consumption comparing to the baseline. [None] Regulation of AHUs set points. Manual regulation of AHUs supply air (stochastic work).

Programmatic regulation of AHUs

set points.

Partially completed. In all units except for

two critical AHUs.

Reduction of thermal energy consumption comparing to the baseline. Further software improvements. Regulation of heat recovery work. Lack of any automation of the heat recovery units.

Programmatic regulation of heat

recovery work. Completed.

Reduction of thermal energy consumption comparing to the baseline. Further software improvements. Replacement of filters in AHUs ducts.

All variable frequency drives are on the maximum speed, and

desired airflow cannot be achieved. Procurement and installation of new filters. Completed. Reduction of electricity consumption comparing to the baseline. [None]

Zoning Lack of zone control in premises. Introducing the zone control in each premise.

Rejected. High cost and impact on the continuity of building

usage.

[None]

To be checked in the future if there is budget allocated for

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Energy conservation actions example –

Emergency center

 Thanks to the implemented actions, Emergency center Novi Sad saved

162,515 kWh during one year, which is about 5,9% of total energy usage  This is equal to 8,467€ for the period of 12 months

 Considering that this is modern facility with no plenty of space for

improvements, and that even one of the most significant proposed actions was not conducted at all, it can be concluded that achieved results are excellent

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Energy conservation actions example –

Emergency center

Energy reduction

Parameter Result

Annual Energy Reduction 5.9%

Annual Energy Reduction 162,515 kWh/yr

Annual Cost Reduction 8,468 €

Average Annual Energy Consumption Before

Intervention 2,773,493 kWh/yr Average Annual Energy Consumption After

Intervention 2,610,978 kWh/yr

Carbon reduction

Parameter Result

Annual CO2 Reduction 5.3%

Annual CO2 Reduction 133,574 kg CO2/yr

Average CO2 Before Intervention 2,516,919 kg CO2/yr

Average CO2 After Intervention 2,383,345 kg CO2/yr

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Results

 Thermal energy: During the study period, associated energy reductions were between 7.73% and 30.47% resulting in an aggregated energy reduction by consumers of 22.76% which equates to 1,450,070 kWh/yr. This resulted in an aggregated annual carbon reduction of 21.6% which equates to 363,139 kg CO2/yr

 Electrical energy: During the study period, associated energy reductions were between 5.10% and 35.84% resulting in an aggregate energy reduction of 8.2% which equates to 537,519 kWh/yr. This resulted in an aggregated annual carbon reduction of 8.2% which equates to 377,925 kg CO2/yr

Energy reduction - Total Thermal

Parameter Result

Annual Energy Reduction 22.8%

Annual Energy Reduction 1,450,070 kWh/yr

Average Annual Energy Consumption

Before Intervention 6,369,980 kWh/yr Average Annual Energy Consumption

After Intervention 4,919,910 kWh/yr

Energy reduction - Total Electricity

Parameter Result

Annual Energy Reduction 8.2%

Annual Energy Reduction 537,519 kWh/yr

Average Annual Energy Consumption

Before Intervention 6,581,090 kWh/yr Average Annual Energy Consumption

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Return of investments

 Information about energy savings is used to calculate return of investment (ROI)

 ROI is based on invested funds and operational costs of EMMOS work

(operation by end user, that is building management dedication), as well as on annual cost reduction

 Invested amount is covered with TEDS4BEE project expenses

 Considering all above, it can be seen that 12 out of 16 pilot buildings have reached positive results

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Return of investments

Building invested (€)Amount manager Building dedication (€)

Amount

Returned (€) Gain or Loss (€)

Gain or Loss without amount

invested (€)

B1 - Buttershaw Business/enterprise college 1,300 € 875 € 59,918 € 57,744 € 59,044 €

B17 - Università del Salento 0 € 875 € 4,167 € 3,293 € 3,293 €

B3 - Clinical centre of Vojvodina Novi Sad 1,500 € 875 € 8,467 € 6,093 € 7,593 €

B4 - Real estate management Wola Warsaw 0 € 875 € 2,434 € 1,559 € 1,559 €

B5 - Technical University of Warsaw 0 € 875 € 16,641 € 15,766 € 15,766 €

B6 - Marshall´s office on Lodz region 0 € 875 € 678 € -197 € -197 €

B7 - Soto del Real´s Swimming pool 71,760 € 875 € -3,039 € -75,675 € -3,915 €

B8 - Soto del Real´s City Hall 0 € 875 € 785 € -89 € -89 €

B9 - Social security directorate Zaragoza 1,637 € 875 € 24,222 € 21,710 € 23,347 €

B10 - Financial control unit Zaragoza 1,637 € 875 € -615 € -3,128 € -1,490 €

B11 - Social security office 50/01 Zaragoza 1,637 € 875 € 3,210 € 698 € 2,335 €

B12 - Social security office 50/02 Zaragoza 1,637 € 875 € 937 € -1,575 € 63 €

B13 - Social security office 50/03 Zaragoza 1,637 € 875 € 1,133 € -1,380 € 258 €

B14 - Social security office 50/04 Zaragoza 1,637 € 875 € 1,716 € -796 € 841 €

B15 - Social security office 50/05 Calatayud 1,637 € 875 € 3,674 € 1,162 € 2,799 €

B16 - Social security office 50/06 Zaragoza 1,637 € 875 € 1,576 € -936 € 701 €

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Return of investment – future use

 In the sense of future usage, there are two main approaches exploited: keeping the achieved level of energy performance (no increment of energy savings during the following years), and possibility of further energy

optimization (increase of energy savings over the years)

 Energy savings estimation for years 2-4, for scenario 2, are based on building’s properties and several information sources (US/EU departments of energy)

Scenario 2014 – February Year 1 [March 2015] Year 2 [March 2015 – February 2016] Year 3 [March 2016 – February 2017] Year 4 [March 2017 – February 2018] Scenario 1: Keeping the current

level of energy performance (no increment of energy savings)

[Amount returned (€) of each building – previous table]

0 € 0 € 0 €

Scenario 2: Further increase of energy savings(increment of energy savings) [Amount returned (€) of each building – previous table] Energy savings estimation Energy savings estimation Energy savings estimation

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Return of investment – future use

Building Year 1 [March 2014 – February 2015] Year 2 [March 2015 – February 2016] Year 3 [March 2016 – February 2017] Year 4 [March 2017 – February 2018] Total after two years Total after four years

B1 - Buttershaw Business/enterprise college 59,044 € -875 € -3,150 € -3,150 € 58,169 € 51,869 €

B17 - Università del Salento 3,293 € -875 € -2,500 € -2,500 € 2,418 € -2,582 €

B3 - Clinical centre of Vojvodina Novi Sad 7,593 € -875 € -4,350 € -4,350 € 6,718 € -1,982 €

B4 - Real estate management Wola Warsaw 1,559 € -875 € -2,500 € -2,500 € 684 € -4,316 €

B5 - Technical University of Warsaw 15,766 € -875 € -2,500 € -2,500 € 14,891 € 9,891 €

B6 - Marshall´s office on Lodz region -197 € -875 € -2,500 € -2,500 € -1,072 € -6,072 €

B7 - Soto del Real´s Swimming pool -3,915 € N/A N/A N/A N/A N/A

B8 - Soto del Real´s City Hall -89 € -875 € -2,500 € -2,500 € -964 € -5,964 € B9 - Social security directorate Zaragoza 23,347 € -875 € -5,350 € -5,350 € 22,472 € 11,772 €

B10 - Financial control unit Zaragoza -1,490 € N/A N/A N/A N/A N/A B11 - Social security office 50/01 Zaragoza 2,335 € -875 € -4,350 € -4,350 € 1,460 € -7,240 €

B12 - Social security office 50/02 Zaragoza 63 € -875 € -4,350 € -4,350 € -812 € -9,512 € B13 - Social security office 50/03 Zaragoza 258 € -875 € -4,350 € -4,350 € -617 € -9,317 €

B14 - Social security office 50/04 Zaragoza 841 € -875 € -4,350 € -4,350 € -34 € -8,734 € B15 - Social security office 50/05 Calatayud 2,799 € -875 € -4,350 € -4,350 € 1,924 € -6,776 €

B16 - Social security office 50/06 Zaragoza 701 € -875 € -4,350 € -4,350 € -174 € -8,874 €

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Return of investment – future use

Building Year 1 [March 2014 – February 2015] Year 2 [March 2015 – February 2016] Year 3 [March 2016 – February 2017] Year 4 [March 2017 – February 2018] Total after two years Total after four years

B1 - Buttershaw Business/enterprise college 59,044 € 8,043 € 5,545 € 5,328 € 67,086 € 77,959 €

B17 - Università del Salento 3,293 € 136 € -1,590 € -1,681 € 3,429 € 157 €

B3 - Clinical centre of Vojvodina Novi Sad 7,593 € 2,558 € -1,003 € -1,087 € 10,151 € 8,061 €

B4 - Real estate management Wola Warsaw 1,559 € 1,526 € -339 € -555 € 3,085 € 2,191 €

B5 - Technical University of Warsaw 15,766 € 837 € -831 € -872 € 16,603 € 14,900 €

B6 - Marshall´s office on Lodz region -197 € 1,741 € 50 € -13 € 1,544 € 1,581 €

B7 - Soto del Real´s Swimming pool -3,915 € N/A N/A N/A N/A N/A

B8 - Soto del Real´s City Hall -89 € -196 € -1,923 € -2,010 € -286 € -4,219 € B9 - Social security directorate Zaragoza 23,347 € 209 € -4,293 € -4,320 € 23,556 € 14,943 €

B10 - Financial control unit Zaragoza -1,490 € N/A N/A N/A N/A N/A B11 - Social security office 50/01 Zaragoza 2,335 € 156 € -3,422 € -3,515 € 2,492 € -4,445 €

B12 - Social security office 50/02 Zaragoza 63 € 893 € -2,847 € -3,073 € 956 € -4,964 € B13 - Social security office 50/03 Zaragoza 258 € 284 € -3,365 € -3,513 € 542 € -6,335 €

B14 - Social security office 50/04 Zaragoza 841 € -47 € -3,605 € -3,680 € 794 € -6,491 € B15 - Social security office 50/05 Calatayud 2,799 € 571 € -3,049 € -3,179 € 3,370 € -2,858 €

B16 - Social security office 50/06 Zaragoza 701 € 571 € -3,121 € -3,305 € 1,272 € -5,154 €

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Return of investment – future use

 In both scenarios, it can be clearly seen that use of energy management software such as EMMOS can have great positive impacts on building energy performance and expenses for the period of at least two years

 This period can be even longer, if all of the suggested actions were (or will be) conducted

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Conclusions

 The results indicate that considerable energy and carbon reductions have been achieved as a result of the deployment of EMMOS

 Taking into account all of the buildings that have participated on TEDS4BEE project, it is achieved an aggregate energy reduction of 15.35% which

equates to 1,987,590 kWh/yr. This resulted in an overall aggregated annual carbon reduction of 11.8% which equates to 741,064 kg CO2/yr

 Funds saved are equal to 126,000€, with the costs of implementation which amount to only 14,000€

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Conclusions

 It is easy to see huge benefits from such energy management software use, especially having in mind significant differences among the buildings

(location, purpose, size etc.) and a number of parameters that need to be monitored in order to get the full picture about some facility

 With various reports and analysis, EMS saves significant time of its clients, leaving them only to choose the actions that are going to be conducted

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