A Study on Analysis and Performance Evaluation of a Net Zero Carbon Building

Abstract

Thebuildingsectorsignificantlycontributestoglobalenergyconsumptionandcarbon emissions, highlighting the need for energy-efficient and low-carbon buildings. This study focuses on the analysis and performance evaluation of a Net-Zero Carbon Building by examining energy consumption, building envelope performance, HVAC and lighting loads, thermal comfort, renewable energy generation, and carbon emissions. Passive design strategies and energy-efficient systems are evaluated for their effectiveness in reducing energy demand, while renewable energy integration is assessed for offsetting operational energy consumption. KeyperformanceindicatorssuchasEnergyUseIntensity(EUI),annualenergyconsumption, renewable energy contribution, and carbon emissions are analyzed. The study identifies opportunities for improving building efficiency and reducing carbon impact, while providing practical strategies for achieving net-zero performance and guiding sustainable practices in future building construction.

Introduction

The text discusses the need to develop energy-efficient and net-zero carbon buildings in the Chandigarh–Mohali region. Due to the region’s hot summers, monsoon conditions, and cool winters, buildings require significant heating and cooling energy. Factors such as building orientation, envelope design, glazing, shading, HVAC efficiency, lighting, and renewable-energy systems strongly influence overall energy consumption and carbon emissions.

The central research problem is to determine how appropriate building design and energy-efficient strategies can reduce operational energy demand and carbon emissions, and how renewable energy—particularly Solar PV—can help achieve net-zero operational carbon performance.

A key principle highlighted is:

Reduce energy demand → Improve efficiency → Generate renewable energy → Measure → Verify

Passive design strategies such as climate-responsive orientation, high-performance envelopes, optimized glazing, shading, daylighting, and natural ventilation can reduce energy demand. Efficient HVAC systems, LED lighting, smart controls, and Building Management Systems can further improve performance. Solar PV can supply a significant portion of the remaining electricity demand and reduce dependence on the grid.

However, achieving genuine net-zero carbon performance is challenging because of high initial costs, increasing energy demand, intermittent renewable generation, limited space for Solar PV, embodied carbon in construction materials, uncertainties in energy modelling, occupant behavior, maintenance issues, and the gap between predicted and actual building performance. Climate change and urban heat-island effects may further increase cooling requirements.

The text therefore argues that net-zero buildings should not be viewed simply as buildings that offset their emissions. Instead, environmental impacts should first be minimized at source, followed by efficient operation, renewable-energy generation, and credible measurement and verification. The overall approach should integrate passive design, energy efficiency, renewable energy, low-carbon materials, life-cycle assessment, intelligent controls, and continuous performance monitoring to move toward practical net-zero carbon performance.

Conclusion

1) Net-zerocarbonbuildingsrequireanintegrateddesignapproachratherthanrelianceona single technology or strategy. Building planning, envelope design, HVAC, lighting, renewable energy and operational practices must work together. 2) Reducing energy demand is the first priority in achieving net-zero performance. Passive strategiessuchasclimate-responsiveorientation,appropriateshading,naturalventilation, day lighting and optimized building form can substantially reduce cooling, heating and lighting requirements. 3) Thebuildingenvelopeplaysacriticalroleinenergyperformance.Properinsulation, suitableglazing,controlledwindow-to-wallratiosandeffectiveexternalshadingcan reduce unwanted solar heat gain and improve indoor thermal comfort. 4) HVACsystemsrepresentasignificantcomponentofbuildingenergyconsumption, particularly under the climatic conditions of the Chandigarh–Mohali region. High-efficiencyHVACequipment,appropriatesizing,zoningandintelligentcontrolsare therefore essential for reducing operational energy demand. 5) Lightingandelectricalloadsshouldbeminimizedthroughenergy-efficientsystems.LED lighting, daylight utilization, occupancy controls and efficient equipment can reduce unnecessary electricity consumption without compromising occupant comfort. 6) Renewable energy, particularly Solar PV, is an important component of the net-zero pathway.Afterreducingthebuilding\'senergydemand,appropriatelysizedPVsystems can offset a significant portion of the remaining electricity requirement and reduce dependence on grid electricity. 7) Net-zerocarbonperformanceshouldnotbeevaluatedsolelythroughenergygeneration. Theassessmentshouldconsiderenergyconsumption,renewable-energygenerationand the associated carbon emissions within a clearly defined system boundary. 8) EnergyUseIntensity(EUI)isanimportantperformanceindicatorforcomparingbuilding energy performance. Annual energy consumption, peak loads, renewable-energy contribution and carbon emissions should also be evaluated to obtain a comprehensive performance assessment. 9) Embodied carbon must be considered alongside operational carbon. Materials, constructionprocesses,transportation,replacementandend-of-lifeimpactscancontribute significantly to the overall carbon footprint of a building. 10) TheChandigarh–Mohaliclimatecreatesspecificdesignchallenges.Hotsummerscan increase cooling demand, monsoon conditions influence ventilation and moisture considerations, while cool winters create seasonal heating requirements. Therefore, climate-responsive strategies should be incorporated into the building design. 11) There can be a significant performance gap between predicted and actual building performance.Energymodellingalonecannotestablishwhetherabuildingisgenuinely achievingitsintendedperformance;actualenergyconsumptionmustbemonitoredand compared with predicted results. 12) Occupantbehaviourandbuildingoperationsignificantlyinfluenceenergyperformance. User awareness, thermostat settings, equipment usage, operating schedules and maintenance practices can alter actual energy consumption. 13) Thehighinitialcostofenergy-efficienttechnologiesremainsamajorbarrier.However, the evaluation of a net-zero building should consider long-term energy savings, operationalbenefitsandlife-cycleimpactsratherthanfocusingonlyoninitial construction cost. 14) Continuousmonitoringandverificationareessentialforcrediblenet-zeroclaims.Smart meters, Building Management Systems and regular performance assessments can help identify deviations from predicted performance and support corrective actions. 15) The concept of net-zero carbon should therefore be understood as a measurable performanceobjectiveratherthanmerelytheinstallationofrenewable-energysystems.A building should demonstrate that its defined energy and carbon balance is achieved within a clearly established assessment boundary. 16) The key conclusion of the literature review is that achieving net-zero carbon performance is technically possible only through the combined application of passive design, energy efficiency, renewable energy, low-carbon materials and continuous performancemonitoring.Noindividualinterventionissufficienttoachievethedesired outcome. 17) Therefore,theproposedstudyshouldevaluatethebuildingholistically,consideringthe interaction between climate, envelope, HVAC, lighting, occupant comfort, energy consumption, renewable-energy generation and carbon emissions.

References

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Copyright

Copyright © 2026 Chandan Aggarwal. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.