scholarly journals NOVEL INTEGRATED DESIGN STRATEGIES FOR NET-ZERO-ENERGY SOLAR BUILDINGS (NZESBS) IN NANJING, CHINA

2015 ◽  
Vol 10 (3) ◽  
pp. 89-115 ◽  
Author(s):  
Changhai Peng ◽  
Lu Huang ◽  
Bangwei Wan
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Integrated Design ◽  
Building Envelope ◽  
Zero Energy ◽  
Storage Technology ◽  
Net Zero Energy ◽  
Energy Storage Technology ◽  
Net Zero ◽  
Solar Design

The connotations and denotations of the term net-zero-energy solar buildings (NZESBs) have been in constant flux because of continuous developments in solar heating technology, solar photovoltaic (PV) technology, building energy-storage technology, regional energy-storage technology, and energy-management systems. This paper focuses on innovative strategies for implementing NZESBs in Nanjing, China. These strategies include integrated architectural design, including passive solar design (respecting climatic characteristics and conducting integrated planning based on the environment, building orientation, distance between buildings, building shape, ratio of window area to wall area, and building envelope) and active solar design (integration of the solar-energy-collecting end of the system – collectors and PV panels – with the building surface – roof, wall surfaces, balconies, and sun-shading devices – and the integration of solar-energy transfer and storage equipment with the building). Some Nanjing-specific recommendations and findings on NZESBs are proposed. The results illustrate that NZESBs can be realized in Nanjing if solar energy technologies are appropriately integrated with the characteristics of Nanjing's geography, climate and buildings.

scholarly journals OPTIMAL WIND/SOLAR ENERGY MIX FOR RESIDENTIAL NET ZERO-ENERGY BUILDINGS

2018 ◽  
Author(s):  
Janar KALDER ◽  
Alo ALLIK ◽  
Hardi HÕIMOJA ◽  
Erkki JÕGI ◽  
Mart HOVI ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Heat Pump ◽  
The Self ◽  
Zero Energy ◽  
Cover Factor ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero

The article is concentrated on the energy storage problems arising from microgeneration in private households. The case study involves a small-scale wind and solar electricity production set in a net zero-energy building. Both the net zero-energy building and the microgeneration units are connected to an utility grid. The current article serves to confirm the hypothesis, that the self consumption is at its maximum with the annual 70/30 wind and solar energy mix of in favour of the wind. The maximal self consumption at no additional energy storage in a net zero-energy building is studied as well. Produced and consumed energies are equal, which satisfies the requirements for a net zero-energy building with the utility grid acting as an energy buffer. The consumed energy is used to operate a heat pump, heat up ventilation supply air, run ventilation fans, supplying non-shiftable loads (white goods, TV, lighting etc), heat up domestic hot water via heat pump. To express self consumption, we use the term of supply cover factor, which describes optimally the directly consumed energy in relationship to net consumption or production. In annual scale, the cover factors for a net zero-energy building are equal as the production and consumption are equal as well. Also, seasonal variations in self consumption are studied. According to study results, the annual maximal supply cover factor in a net zero-energy building is 0.375 with 70/30 wind/solar mix. Seasonally, the self consumption is at its maximum in summer when the supply cover factor equals to 0.49.

scholarly journals Net Zero-Energy Home Design Strategies Learned From Canadian Experience

2008 ◽  
Vol 33 (3) ◽  
pp. 88-95
Author(s):  
Masa Noguchi
Keyword(s):  
Building Envelope ◽  
Design Strategies ◽  
Zero Energy ◽  
Sustainable Housing ◽  
Energy Technologies ◽  
Canadian Experience ◽  
Net Zero Energy ◽  
Net Zero ◽  
Micro Power ◽  
Healthy Housing

In response to the growing demand for zero-energy housing, today's home needs not only to be energy-efficient, but also to provide part of its own energy requirements. The energy efficiency may be improved by applying high thermal performance building envelope and passive energy and environmental systems to housing. Micro-power can be generated through the use of renewable energy technologies. This paper is aimed at providing a comprehensive guideline on the design techniques and approaches to the delivery of net zero-energy healthy housing in view of the ÉcoTerra house, which won the Canadian federal government's EQuilibrium sustainable housing competition. The house was built in Eastman in the province of Quebec and it is currently open to the general public in order to sharpen the consumers' awareness of commercially available net zero-energy healthy housing today.

scholarly journals Simuling a Compressed Air Energy Storage For a Net Zero Energy Building in Tropics

2016 ◽  
Vol 19 (3) ◽  
pp. 130 ◽  
Author(s):  
Jean Castaing-Lasvignottes ◽  
Mathieu David ◽  
Sidiki Simpore ◽  
Olivier Marc ◽  
François Garde
Keyword(s):  
Energy Storage ◽  
Compressed Air ◽  
Compressed Air Energy Storage ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero

Improvements in the Airtightness of Housing in Richmond, British Columbia

2021 ◽  
Author(s):  
Sepehr Foroushani
Keyword(s):  
British Columbia ◽  
Residential Buildings ◽  
Building Envelope ◽  
Extreme Weather Events ◽  
Air Leakage ◽  
Zero Energy ◽  
Performance Targets ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero

Controlling air leakage through the building envelope remains a challenge, especially in light of the imperative to transition to a net-zero energy building sector and the increasing importance of indoor air quality during extreme weather events such as wildfires. The British Columbia Energy Step Code is a performance-based compliance option in the British Columbia Building Code which is intended to provide a transition pathway to net-zero energy ready construction by 2032. For small residential buildings, performance targets entail thresholds for the measured air leakage rate through the building envelope. This paper reports on the airtightness of the first 145 single- and two-family dwellings built under the Energy Step Code in Richmond, BC. Although the first phase of the implementation of the Energy Step Code in Richmond entailed no airtightness targets (only testing), results indicate improvement compared to the historical levels of airtightness in the region.

Assessment of Photovoltaic Capabilities in Urban Environments: A Case Study of Islamabad, Pakistan

2020 ◽  
Vol 142 (6) ◽  
Author(s):  
Muhammad Zubair ◽  
Sajid Ghuffar ◽  
Muhammad Shoaib ◽  
Ahmed Bilal Awan ◽  
Abdul Rauf Bhatti
Keyword(s):  
Deep Learning ◽  
Solar Energy ◽  
Urban Areas ◽  
Capital City ◽  
Coefficient Of Performance ◽  
Energy Yield ◽  
Cooling Load ◽  
Zero Energy ◽  
Net Zero Energy ◽  
Net Zero

Abstract Photovoltaic (PV) estimation in an urban environment requires detection of rooftop area, design of PV system based on optimization on PV placement distance and the study of additional benefit of lower cooling load of building by shading provided by PV panels. The study is aimed at policymakers to introduce renewable energy policy toward net-zero energy buildings in urban areas. In this research, the capital city of Pakistan, Islamabad, is analyzed for rooftop PV capabilities using deep learning algorithms. The area of the rooftop is calculated by extracting buildings in high-resolution satellite imagery using a deep learning algorithm. The site location is analyzed for available solar energy resources. The distance between the rooftop-PV array is optimized based on self-shading losses, coefficient of performance, energy yield, net-zero energy analysis, and reduction of cooling load of the building provided by PV arrays as shading devices. The 40-km2 area of Islamabad considered in this research can generate 1038 GWh of solar energy annually from its 4.3-km2 rooftop area by installed capacity of 447 MW PV panels rows placed at 0.75 m apart. The electricity generated by Islamabad can curtail residential load from the national grid and form a near net-zero energy zone while the electrical energy from the grid can be provided to the industries to enhance the economy and reduce unemployment in Pakistan.

scholarly journals Targeting Energy Efficiency through Air Conditioning Operational Modes for Residential Buildings in Tropical Climates, Assisted by Solar Energy and Thermal Energy Storage. Case Study Brazil

2021 ◽  
Vol 13 (22) ◽  
pp. 12831
Author(s):  
Alex Ximenes Naves ◽  
Laureano Jiménez Esteller ◽  
Assed Naked Haddad ◽  
Dieter Boer
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Energy Storage ◽  
Air Conditioning ◽  
Residential Buildings ◽  
Zero Energy ◽  
Net Zero Energy ◽  
Net Zero ◽  
Life Cycle Perspective ◽  
Operational Modes

Economy and parsimony in the consumption of energy resources are becoming a part of common sense in practically all countries, although the effective implementation of energy efficiency policies still has a long way to go. The energy demand for residential buildings is one of the most significant energy sinks. We focus our analysis on one of the most energy-consuming systems of residential buildings located in regions of tropical climate, which are cooling systems. We evaluate to which degree the integration of thermal energy storage (TES) and photovoltaic (PV) systems helps to approach an annual net zero energy building (NZEB) configuration, aiming to find a feasible solution in the direction of energy efficiency in buildings. To conduct the simulations, an Energy Efficiency Analysis Framework (EEAF) is proposed. A literature review unveiled a potential knowledge gap about the optimization of the ASHRAE operational modes (full storage load, load leveled, and demand limiting) for air conditioning/TES sets using PV connected to the grid. A hypothetical building was configured with detailed loads and occupation profiles to simulate different configurations of air conditioning associated with TES and a PV array. Using TRNSYS software, a set of scenarios was simulated, and their outputs are analyzed in a life cycle perspective using life cycle costing (LCC). The modeling and simulation of different scenarios allowed for identifying the most economic configurations from a life cycle perspective, within a safe range of operability considering the energy efficiency and consequently the sustainability aspects of the buildings. The EEAF also supports other profiles, such as those in which the occupancy of residential buildings during the day is increased due to significant changes in people’s habits, when working and studying in home office mode, for example. These changes in habits should bring a growing interest in the adoption of solar energy for real-time use in residential buildings. The results can be used as premises for the initial design or planning retrofits of buildings, aiming at the annual net zero energy balance.

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