Abstract
The investigation presents a strategic approach during the design process using advanced energy performance simulation technology. Team coordination and building performance efficiency during the design process is aided by conducting a performance based assessment with comprehensive fully incorporated design, construction, energy, HVAC and annual building operation. The simulation methodology aids the performance based decision making which demonstrated through an office building complex. The engineering decisions were based on performance enhancement and overall energy demand reduction, which was evaluated on an annual basis. The building envelope‘s dominant curtain wall system was analyzed in detail in order to demonstrate qualitative energy performance improvement. VAV and DOAS HVAC systems‘ annual energy performance was estimated and evaluated from the aspect of end-use energy.
Highlights
The investigation covers the energetic and operational energy demand analysis of a 23 205 sqm office building complex [1] located in Budapest, Hungary
With the energy simulation run-time of 8760 hours annual heating and cooling energy demands were determined for two operational scenarios: 1) Permanent maximum heat loads – entire building is occupied during working hours 2) Without internal heat loads – estimation of internal loads influence on the energy performance Particular emphasis was placed on the curtain wall’s glass structure and its energy performance
The electricity end energy use for the VAV system is in total resulted in 2060 GJ/a or 572 MWh/a, while the DOAS system performed with 1465 GJ/a or 407 MWh
Summary
The investigation covers the energetic and operational energy demand analysis of a 23 205 sqm office building complex [1] located in Budapest, Hungary. Various design alternatives were used to select the most preferable curtain-wall structure. Teams have demonstrated various approaches in energy analysis of office buildings using simulation techniques [6,7,8]. Our task was to justify which curtain-wall window structure would be the most preferable from the energy performance aspect, and to demonstrate which is the most appropriate window type contributing to higher energy efficiency of the building. We evaluated the influence of the curtain-wall structure on the heating and cooling energy requirements on an annual basis, from which we determined the annual energy savings. Two types of HVAC systems were simulated in order to assess and evaluate their annual end use energy consumption in order to held decision-making in the early design phases of the energy strategy
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