Energy Audit Report - the International School of Belgrade

PRELIMINARY ENERGY AUDIT REPORTTHE INTERNATIONAL SCHOOL OF BELGRADETemisvarska 19, BelgradeBanjickih zrtava 6, BelgradeMay 20131

EXECUTIVE SUMMARYAll information in the Executive Summary should be drawn from the detailedinformation in the full report. The Executive Summary should contain a briefdescription of the preliminary audit including:• Name of the audited institution, location of facility or building audited• Objective of audit• Dates of preliminary audit• Key systems and equipment studied2

Table of Contents• Introduction• Overview of current systems in place• Scope of work for energy audit• Recommendations and the associated costs and savings• Conclusions3

IIntroductionObjectives of preliminary auditIssues of sustainable development have become one of the most important globaltopics nowadays, especially in the fields of energetics and economy. This subject matteris directly related to inability to provide enough energy, and on the other side, topollution and global warming caused by exceeded and irrational consumption of energy.Global economy crisis affects all world regions and countries, as well as alleconomic sectors, putting in the first plan the crucial role of sustainability concept andenergy efficiency in the long-term strategic planning of economic and politicaldevelopment.Struggle with energy resources availability consequently increases price ofconventional energy resources, making existing, inadequately monitored, energyconsumption inapplicable in the future.Energy efficiency is defined as efficient use of energy in all aspects of finalconsumption: industry, transport, services, agriculture and buildings. Energy efficiencyis absolutely favourable to simple reduction of energy used, since it requires no usagerestraint and it doesn’t compromise basic living and working conditions.Buildings are major specific energy user, demonstrating upward tendency triggeredby both population increase as well as improved standard of living. Inside the EuropeanUnion buildings consume 41% of total energy usage, more than industry with agricultureand services (31%) and transport (28%). On the other hand, this fact also suggests thatbuildings have the greatest potential for energy consumption decrease.The main objective of this report is to provide a preliminary general insight of schoolbuildings’ available resources and possibly locate areas where improvement is possible.Additionally, the goal would be to identify major problem areas, to suggest brieflypossible corrective measures, and to provide estimates of implementation cost,potential cost savings and investments’ payback periods. In the end of this auditingphase, a list of energy conservation measures should be recommended. With dataobtained from the preliminary audit, we expect that decision makers would be able toprioritize energy-efficiency projects, being aware that this level of detail is not sufficientfor making a final decision on implementation of proposed measures.4

Description of facility or building audited – numbers of floors, floor area, airconditionedarea, type of usage, occupancy, hours of operation, age of building, etc.LOWER SCHOOLFACILITIES DESCRIPTIONNumber of floorsFloor areaAir/C areaType of usageOccupancyHours of operationAge of buildingMain Villa 4 676.62 Entire area Educational 64 9 1932Director's Office 1 187.56 Entire area Educational 49 9 2002Obradovic Hall 1 300.27 Entire area Educational 69 9 1971MPR 1 134.00 Entire area Sports 20 9 2002Friendship Hall 1 235.72 Entire area Educational 40 9 1972International Hall 1 340.03 Entire area Educational 70 9 2001MIDDLE SCHOOLNumber of floorsFloor areaAir/C areaType of usageOccupancyHours of operationAge of buildingMain building 4 825.79 Entire area Educational 140 9 2011Gym 1 961.99 Entire area Sports 25 14 2011HIGH SCHOOLNumber of floorsFloor areaAir/C areaType of usageOccupancyHours of operationAge of buildingMain building 4 946.60 Entire area Educational 100 9 1966Language Lab 1 102.55 Entire area Educational 10 9 1933Math Lab 1 49.08 Entire area Educational 10 9 2004PA Studio 1 157.92 Entire area Educational 10 9 19335

Past years’ energy consumption and cost$25,000.00ISB Electricity Cost 2008-2013$20,000.00$15,000.00$10,000.00Lower SchoolMiddle SchoolHigh School$5,000.00$-2008-2009 2009-2010 2010-2011 2011-2012 2012-2013$12,000.00ISB Water Cost 2008-2013$10,000.00$8,000.00$6,000.00$4,000.00Lower SchoolUpper School$2,000.00$-2008-2009 2009-2010 2010-2011 2011-2012 2012-20136

$40,000.00ISB Heating Oil Cost 2008-2013$35,000.00$30,000.00$25,000.00$20,000.00$15,000.00Lower SchoolMiddle SchoolHigh School$10,000.00$5,000.00$-2008-2009 2009-2010 2010-2011 2011-2012 2012-2013II Overview of Current Systems in Place• Dates of preliminary audit• Data collected from manufacturers’ design specifications7

IIIScope of Work for Detailed Energy Audit• Phases of work intended• Brief description of what will be done at each stage of the energy audit and whatwill be achieved• Duration of each phase• Personnel involved at each phase• Proposed instrumentation plan in detail• A layout of the proposed location of installation of instruments and sensors,preferably with picturesThere are generally 4 phases to an Energy Audit:1. Investigation Phase2. Monitoring Phase3. Analysis & Reporting Phase4. Post Audit Phase1. Investigation PhaseThis phase involves Facility Manager collecting available relevant data concerning:Reason for the Energy Audit,Level of audit required,Date of required completion,Energy consumption for the past 1 to 2 years,Tariffs and related energy supply contracts,Floor areas, staff numbers, production levels,Occupancy hours,Industry energy use/cost benchmark levels,Sub electrical and gas metering equipment,After-hours power usage,Mechanical plant configuration (e.g. air-conditioning plant rated cooling capacity,pump and fan motor kW ratings and efficiency); as-installed drawings, electricalsingle line drawings, and operational & maintenance manuals,Lighting configuration (i.e. lamp number & fitting type, Wattage, ballast type),condition and controls,Compressed air system (if present) including rating, presence of air leaks, hoursof usage,Steam and hot water boilers,Building Management Systems, control strategies and maintenance schedules,Building envelope, shading, orientation, insulation levels,Asset management plan, if any.8

2. Monitoring PhaseThis phase involves obtaining detailed information pertaining to the overall site as wellas the major energy use categories. The operation of key equipment is inspected, andmeasurement of a range of parameters is undertaken where appropriate, including:Electrical & gas load profiles,Internal temperature/humidity,Ventilation rate,Light levels,Process specific monitoring.Feedback is also obtained from maintenance staff on issues concerning building andplant operation and maintenance which could well be impacting on energy efficiency aswell as occupant comfort.3. Analysis & Reporting PhaseThis phase involves:Determination of overall energy efficiency of complex; for example kWh/m2 perannum for office buildings, kWh or $/occupied room night per annum for hotels,kWh or $/item per annum for a manufacturing process,Determination of the greenhouse emission index,Life cycle cost analysis of various energy saving measures,Tariff analysis,Written report on findings.4. Post Audit PhaseThis phase involves the school acting on the Energy Audit Report. We should:Decide if a higher level of Energy Audit is required following a Preliminary Audit,Produce an action plan which prioritizes the recommended tasks, allocates rolesand contains a timetable for their completion,Consult with and educate staff about the action plan and the reasons forimplementing it,Regularly monitor the results of implemented actions and review the plan asrequired9

IVRecommendations and the Associated Costs and Savings• Brief description of the present situation and shortcomings identified• Initial findings, observations and assessment of the performance of systems orequipment• Initial recommendations on energy saving measures with estimated energy andcost savings, investment cost and payback period for each measure. Allnumbers should be supported by information and assumptions made must bestated clearlyVConclusions• Summary of recommendations, estimated annual kWh and estimated costsavings, estimated investment cost and payback in table form10