scholarly journals Net-Zero Energy Buildings: Principles and Applications

2020 ◽  
Author(s):  
Maher Shehadi
Keyword(s):  
Climate Change ◽  
Design Tools ◽  
Zero Energy ◽  
Active Participant ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero ◽  
Net Zero Energy Buildings ◽  
Zero Energy Buildings

Global warming and climate change are rising issues during the last couple of decades. With residential and commercial buildings being the largest energy consumers, sources are being depleted at a much faster pace in the recent decades. Recent statistics shows that 14% of humans are active participant to protect the environment with an additional 48% sympathetic but not active. In this chapter, net-zero energy buildings design tools and applications are presented that can help designers in the commercial and residential sectors design their buildings to be net-zero energy buildings. Case studies with benefits and challenges will be presented to illustrate the different designs to achieve a net-zero energy building (NZEB).

scholarly journals Techno Economic Evaluation and Feasibility Analysis of a Hybrid Net Zero Energy Building in Pakistan: A Case Study of Hospital

2021 ◽  
Vol 9 ◽  
Author(s):  
Saba Arif ◽  
Juntakan Taweekun ◽  
Hafiz Muhammad Ali ◽  
Thanansak Theppaya
Keyword(s):  
Economic Evaluation ◽  
Payback Period ◽  
Zero Energy ◽  
Hybrid Microgrid ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero ◽  
Net Zero Energy Buildings ◽  
Zero Energy Buildings

The current study is an economic evaluation and feasibility study of hybrid microgrid Net Zero Energy Buildings in Pakistan. A Net Zero Energy approach is proposed for a two-story hospital building situated in Taxila, Pakistan. Consequently, to design a hybrid Net Zero Energy Building, the solar radiation potential of the subject location and electricity usage of the hospital are estimated. The proposed hybrid microgrid Net Zero Energy Building comprises photovoltaic modules and converters. However, the thermal load is computed as a grid-connected hybrid system. Economic evaluation is performed by using economic indicators of the net present cost and the payback period. Also, initial and operational costs are determined, to determine the profitability of the project. Results show that the analysis is a cost-effective approach and has a payback period of 2.53y. Additionally, the per-unit cost of electricity is reduced to 0.12 USD/kWh. Moreover, the energy produced by a hybrid system is 10.24% more economical than that of the pre-working grid system. Results explain the reduction in the cost of energy and profit margin in electricity generation and the increase in electricity production and feasibility of hybrid Net Zero Energy Buildings in Pakistan. Research will help to develop an approach toward an IEA task 47 in Pakistan with the possible development of simulation-based installations of Net Zero Energy Buildings in the health sector in Pakistan.

scholarly journals Optimization of Energy Consumption in Net-Zero Energy Buildings with Increasing Thermal Comfort of Occupants

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Mohsen Mahdavi Adeli ◽  
Said Farahat ◽  
Faramarz Sarhaddi
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
General Definition ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero ◽  
Net Zero Energy Buildings ◽  
Zero Energy Buildings

Residential and commercial buildings consume approximately 60% of the world’s electricity. It is almost impossible to provide a general definition of thermal comfort, because the feeling of thermal comfort is affected by varying preferences and specific traits of the population living in different climate zones. Considering that no studies have been conducted on thermal satisfaction of net-zero energy buildings prior to this date, one of the objectives of the present study is to draw a comparison between the thermal parameters for evaluation of thermal comfort of a net-zero energy building occupants. In so doing, the given building for this study is first optimized for the target parameters of thermal comfort and energy consumption, and, hence, a net-zero energy building is formed. Subsequent to obtaining the acceptable thermal comfort range, the computational analyses required to determine the temperature for thermal comfort are carried out using the Computational Fluid Dynamics (CFD) model. The findings of this study demonstrate that to reach net-zero energy buildings, solar energy alone is not able to supply the energy consumption of buildings and other types of energy should also be used. Furthermore, it is observed that optimum thermal comfort is achieved in moderate seasons.

scholarly journals Climate change impact on energy balance of net-zero energy buildings in typical climate regions of China

2019 ◽  
Vol 111 ◽  
pp. 04004
Author(s):  
Jiale Chai ◽  
Pei Huang ◽  
Yongjun Sun
Keyword(s):  
Climate Change ◽  
Energy Balance ◽  
Climate Change Impacts ◽  
Weather Data ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero ◽  
Study Results

Net-zero energy building (NZEB) is widely considered as a promising solution to the current energy and environmental problems. The existing NZEBs are designed using the historical weather data (e.g. typical meteorological year-TMY). Nevertheless, due to climate change, the actual weather data during a NZEB’s lifecycle may differ considerably from the historical weather data. Consequently, the designed NZEBs using the historical weather data may not achieve the desired performance in their lifecycles. Therefore, this study investigates the climate change impacts on NZEB’s energy balance in different climate regions, and also evaluates different measures’ effectiveness in mitigating the associated impacts of climate change. In the study, the multi-year future weather data in different climate regions are firstly generated using the morphing method. Then, using the generated future weather data, the energy balance of the NZEBs, designed using the TMY data, are assessed. Next, to mitigate the climate change impacts, different measures are adopted and their effectiveness is evaluated. The study results can improve the understanding of climate change impacts on NZEB’s energy balance in different climate regions. They can also help select proper measures to mitigate the climate change impacts in the associated climate regions.

scholarly journals From Low-Energy to Net Zero-Energy Buildings: Status and Perspectives

2011 ◽  
Vol 6 (1) ◽  
pp. 46-57 ◽  
Author(s):  
Karsten Voss ◽  
Eike Musall ◽  
Markus Lichtmeß
Keyword(s):  
Energy Balance ◽  
Zero Energy ◽  
Load Matching ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero ◽  
Energy Balance Approach ◽  
Net Zero Energy Buildings ◽  
Energy Efficient Building

“Net Zero-Energy Building” has become a popular catchphrase to describe the synergy between energy-efficient building and renewable energy utilisation to achieve a balanced energy budget over an annual cycle. Taking into account the energy exchange with a grid overcomes the limitations of energy-autonomous buildings with the need for seasonal energy storage on-site. Although the expression, “Net Zero-Energy Building,” appears in many energy policy documents, a harmonised definition or a standardised balancing method is still lacking. This paper reports on the background and the various effects influencing the energy balance approach. After discussing the national energy code framework in Germany, a harmonised terminology and balancing procedure is proposed. The procedure takes not only the energy balance but also energy efficiency and load matching into account.

scholarly journals A Review on Various Designing Techniques Used for Net Zero Energy Buildings

2021 ◽  
pp. 22-25
Author(s):  
Rohit Malviya ◽  
Shravan Vishwakarma
Keyword(s):  
Energy Demand ◽  
Optimized Design ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero ◽  
Viable Solution ◽  
Specific Objective ◽  
Net Zero Energy Buildings ◽  
Zero Energy Buildings

Net-zero energy buildings (NZEBs) were proposed as a viable solution for reducing building energy usage and contamination emission levels. To achieve the desired specific objective, the setups and abilities of the deployed RES in NZEBs should be carefully chosen. The goal of this project is to develop an optimized design approach for a zero-energy building that takes into account the building's usage of energy. The continuous expansion of international energy demand as a result of industrialization and growing populations is presently a major source of concern.

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