scholarly journals Energy performance evaluation of a nearly Zero Energy Building and the reasons for the performance gap between expected and actual building operation

2019 ◽  
Vol 352 ◽  
pp. 012017
Author(s):  
Evangelia Loukou ◽  
Per K. Heiselberg ◽  
Rasmus L. Jensen ◽  
Hicham Johra
Keyword(s):  
Performance Evaluation ◽  
Energy Performance ◽  
Zero Energy ◽  
Performance Gap ◽  
Zero Energy Building ◽  
Building Operation

Architectural Elements with Respect to the Energy Performance of Buildings

2014 ◽  
Vol 1020 ◽  
pp. 561-565 ◽  
Author(s):  
Rastislav Ingeli ◽  
Katarína Minarovičová ◽  
Miroslav Čekon
Keyword(s):  
Energy Demand ◽  
Energy Use ◽  
Energy Performance ◽  
High Energy ◽  
Primary Energy ◽  
Zero Energy ◽  
Architectural Elements ◽  
Zero Energy Building ◽  
Very High Energy ◽  
Building Operation

Buildings account for 40% of the primary energy use and 24%of the generation of green house gases worldwide. Therefore, a reduction of the specific energy demand of buildings and increased use of renewable energy are important measures of climate change mitigation. On the 18th of May 2010 a recast of the EPBD was approved which further clarifies the intention that buildings shall have a low energy demand. The recast of the EPBD specifies that by the end of 2020 all new buildings shall be “nearly zero-energy buildings”. A nearly zero-energy building is defined as a building with a very high energy performance and very simple shape. The current focusing on the energy efficiency of the building operation may lead to uniform cuboid architecture with heavy insulated building envelopes. The paper deals with the influence of energy concept on architectural elements (and their properties as shape, material, colour, texture etc.)

scholarly journals Modeling Energy Efficiency Performance and Cost-Benefit Analysis Achieving Net-Zero Energy Building Design: Case Studies of Three Representative Offices in Thailand

2021 ◽  
Vol 13 (9) ◽  
pp. 5201
Author(s):  
Kittisak Lohwanitchai ◽  
Daranee Jareemit
Keyword(s):  
High Efficiency ◽  
Energy Gap ◽  
Cost Benefit ◽  
Building Design ◽  
Energy Performance ◽  
Office Buildings ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Investment Cost ◽  
High Investment

The concept of a zero energy building is a significant sustainable strategy to reduce greenhouse gas emissions. The challenges of zero energy building (ZEB) achievement in Thailand are that the design approach to reach ZEB in office buildings is unclear and inconsistent. In addition, its implementation requires a relatively high investment cost. This study proposes a guideline for cost-optimal design to achieve the ZEB for three representative six-story office buildings in hot and humid Thailand. The energy simulations of envelope designs incorporating high-efficiency systems are carried out using eQuest and daylighting simulation using DIALux evo. The final energy consumptions meet the national ZEB target but are higher than the rooftop PV generation. To reduce such an energy gap, the ratios of building height to width are proposed. The cost-benefit of investment in ZEB projects provides IRRs ranging from 10.73 to 13.85%, with payback periods of 7.2 to 8.5 years. The energy savings from the proposed designs account for 79.2 to 81.6% of the on-site energy use. The investment of high-performance glazed-windows in the small office buildings is unprofitable (NPVs = −14.77–−46.01). These research results could help architects and engineers identify the influential parameters and significant considerations for the ZEB design. Strategies and technical support to improve energy performance in large and mid-rise buildings towards ZEB goals associated with the high investment cost need future investigations.

scholarly journals ModSCO. Online Reduced Order Models (ROM) to Address the Performance Gap

Proceedings ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 18
Author(s):  
Alessandro Piccinini ◽  
Luis M. Blanes ◽  
Federico Seri ◽  
Letizia D’Angelo ◽  
Marcus M. Keane
Keyword(s):  
Performance Evaluation ◽  
User Interface ◽  
Energy Conservation ◽  
Web Application ◽  
Energy Systems ◽  
Energy Performance ◽  
Reduced Order Models ◽  
Performance Gap ◽  
Reduced Order ◽  
Building Information

This communication presents ModSCO, a web application that supports systematic energy performance evaluation using Reduced Order Models (ROM). These models are particularly useful in scenario with missing, incomplete or uncertain building information. The paper describes the theory behind ROM grey-box modelling and presents case studies that support the smart operation of energy systems by generating Energy Conservation Opportunities (ESCOs) for instance, to help ISO 50001 implementation. The ROM demonstrated to provide accurate results with a reduced effort. The acceptable calibration tolerance provided by the ASHRAE Guideline 14 is been used to demonstrate the ROM’s accuracy. Additionally, the ModSCO architecture and user interface is also described.

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