Discussion on the Intelligent Design of Ultra-Low Energy Consumption Passive Buildings

With the continuous development of science and technology and the gradual improvement of modem building technology, people pay more and more attention to the introduction of advanced technology in architectural design, such as the application of intelligent technology. With the increasingly severe environmental situation, people are increasingly demanding the environmental performance and green performance of buildings. The establishment of ultra-low energy consumption passive buildings has become one of the key construction contents of construction projects. This paper mainly analyzes the design points and architectural forms of related buildings from the perspective of intelligent control.

The Study of Thermal Mass as a Passive Design Technique for Building Comfort and Energy Efficiency

The day/night （diurnal） changes in temperature and solar radiation pose challenges for maintaining human thermal comfort in buildings. Passive and energy-conserving buildings seek to manage the available thermal energy by lowering peaks and dampening the fluctuations in order to maintain conditions for human comfort. Appropriate use of thermal mass moderates the internal temperatures by averaging diurnal extremes. Thermal mass is one of the powerful tools which architects and designers can use to control temperature. It can be used to optimize the performance of energy-conserving buildings that rely primarily on mechanical heating and cooling strategies. Massive building envelopes-such as masonry, concrete, earth, and insulating concrete forms （ICFs） can be utilized as one of the simplest ways of reducing building heating and cooling loads. This article analyses the role and effectiveness of thermal mass as a strategy for providing indoor thermal comfort for passive solar and energy conserving buildings.

Measurement and analysis of airtightness safeguard measures for typical ultra-low energy buildings

Zero-energy buildings constitute an effective means of reducing urban carbon emissions.High airtightness,a typical characteristic of zero-energy building,is closely related to the building’s air infiltration and has a signifi-cant impact on the performance of the building envelope,indoor air quality,building energy consumption,and efficient operation of air-conditioning systems.However,thus far,systematic developments in high-airtightness assurance technologies remain scarce.Most existing studies have tested the airtightness of buildings and typical building components;however,in-depth analyses into the formation of infiltration have not been reported.There-fore,for realizing zero-energy buildings,ensuring airtightness is an urgent problem that needs to be addressed.Accordingly,in this study,based on several building airtightness measurement studies,the typical air leakage paths in buildings were summarized,and the causes of typical air leakage components in buildings were further analysed by tracing construction processes.Moreover,targeted measures for airtightness in buildings were estab-lished and applied to practical cases.Lastly,the resulting improved building airtightness was measured and the results show that the airtightness of the measured ultra-low energy consumption buildings ranges from 0.13 h^(−1)to 0.57 h^(−1),with a mean value of 0.32 h^(−1).The effectiveness of the airtightness safeguard measures was verified.This study serves as a basis for the assumption of the air leakage path distribution when simulating building air infiltration and also provides a design reference for improving the construction technologies and airtightness of buildings.

基于EnergyPlus的被动式建筑能耗仿真实验

该文将Energy Plus建筑能耗仿真与实际被动式建筑现场调研、能耗监测相结合,以青岛地区某被动房为案例,开展了包括现场调研、仿真结果验证、节能潜力分析和敏感性分析等内容的实验项目。实验结果表明,该实验方法可操作性强,仿真结果与实测数据吻合度高,被动式建筑的节能效果得到有效验证。案例被动式建筑全供暖及供冷能耗指标分别为14.08 k Wh/m^(2)·a和8.37 k Wh/m^(2)·a,相比传统建筑全年节能55.26%,其中空调节能率高达56.95%;外墙、外窗保温、遮阳系统等被动措施是主要节能来源,节能占比分别为26.54%、23.58%和23.97%;灰色关联分析显示,外墙传热系数对全年能耗的敏感度最高。

Passive Cooling Strategies in Greening Existing Residential Building in Hot Dry Climate： Case Study in Bahrain

This paper will present several passive-cooling technologies and design features that can be adopted to reduce building heat gain without the need of excess energy consumption. A typical residential unit will be selected as case study and a three basic passive cooling strategies were selected to enhance the building envelop, as well as using appropriate shading devices and green roofing system that prove to be a good environment quality improver. IES energy simulation software will be used to evaluate the performance of the building. The study revealed a number of significant findings in reducing the energy consumption and enhancing the tenants＇ thermal comfort. American Society of Heating Refrigerating and Airconditioning Engineer （ASHRAE） standards specially via improving the performance of building envelop because it is the interface between internal and external environment. Moreover, improving the building envelope has recorded that overall energy and chiller energy consumption can be reduced up to 10.8% and 21.6% respectively, Therefore, it is anticipated that further reductions can be achieved via applying more passive cooling strategies. Finally, it could argue that the results of this paper will not only be applicable to Bahrain but also many countries that have similar climatic and environmental context.

A Review of Applied Methods of Using Solar Energy in Iranian Buildings

Solar energy is the radiant light and heat from the Sun that has been harnessed by human since ancient times. Also secondary solar resources such as wind and wave power, hydroelectric power and biomass account for most of the available renewable energy on Earth, which can be used by human. Architects since alacient times have used various methods to hamesse and employ the solar energy for lighting, cooling and heating and etc. Meanwhile, Iran＇s ancient architecture, as an adaptive one, which consists of various climatic reigns, is filled with abounding examples of using sun energy in buildings. But, unfortunately despite these ancient methods, our modern architects mostly tend to provide energy of buildings with fossil fuels. This increases energy costs of the building＇s and also pollutes the environment. In this article it is intended to consider the ancient ways of using solar energy in Iran, and then suggest new methods for applying in modem buildings. The results of consideration show that among Solar technologies, passive and active methods, Iran＇s ancient architects have used passive methods, for example in mass and space, orientation and settlement of building. The idea of passive methods can be used in new shapes in current buildings, for instance by using solar space, central yard and etc. The suggestive method in this paper is combining the passive methods with the active ones.

Discussion on Electrical Design of Passive Residential Building

As the national buildings in each climate zone and passive low energy consumption building demonstration projects expand,there has been a wave of innovation across the construction industry.China is also becoming a hot zone for energy-efficient and high-performance passive buildings.Along with the traditional passive building structure,steel structure passive construction,assembled PC structure passive construction such as the emergence of various types of passive construction,as well as a variety of new building materials,doors and Windows,and air conditioning air equipment,put forward a new challenge for building electrical engineering design personnel and requirements.

PASSIVE DESIGN TECHNIQUES APPLIED TO GREEN BUILDINGS AS AN AESTHETIC AND SPATIAL DESIGN CONCEPT

1.INTRODUCTION The emergence of environmental problems as major social issues throughout the world has prompted sustainable development efforts in a wide range of areas,including industry,construction,and transportation,followed by the execution of numerous studies and policies.The concept of sustainable development has been dealt with in earnest in the construction field since the Declaration of Interdependence for a Sustainable Future at the 18th Chicago Convention of UIA in 1993.This Declaration included tasks to be implemented with respect to green buildings,such as the recycling of resources,application of energy-efficient designs,and utilization of natural energy in addition to the application of sustainable designs.As part of green building practices,countries around the world have been implementing various green building certification standards,such as LEED,GBCC,CASBEE,and BREEAM.

Conceptual Issues in the Qualification of Intelligent Buildings

The reality of global warming must have been settled by now while the incidence of same has in very recent times adopted unprecedented dimensions. The global community continues to look for ways to combat the impact of climate change and technology is looked upon to deliver the innovations that would ensure a better tomorrow today. Rapid advancement of Information Technology (IT), is now transforming the way we create and interact with the built environment with the notion of Intelligent Buildings (IBs) underscoring its main features. However, these IBs utilize systems that require energy, and fossil fuels are currently the world’s primary energy sources;they can also irreparably harm the environment, exacerbating climate change. What then is the true essence of IBs? This paper, through review of existing literature, attempts to explore some issues associated with the conceptualization of IBs, highlighting how they are similar with other notional options that deliver the same benefits but without the needed IT systems or the energy required in running them. It also discusses the need to focus on less energy demanding and management approaches at design or occupancy of buildings as a way to reduce the demand and thus consumption of fossil fuels across the world.

Passive cooling of porous tile used on external wall

The porous tiles under the dry and wet conditions were studied. The simplified mathematical model was put forward to simulate the procedure of moisture evaporating for the densely porous tile. The results show that the capability of passive cooling of the porous tile is more than 5 ℃ with moisture content of 30% in Yangtze river region. Through the comparison between the measuring and simulating data,it can be proved that the simplified math model can be fully used to the engineering application,which provides a reference to explore the thermal performance of other porous material.

New Building Typologies for Zero Energy Mass Custom Housing(ZEMCH)in More Sustainable Patterns of Development

Conferences and publications on Smart Cities and self-styled ecological buildings such as“Vertical Forests”,“Biophilic”building complexes and other similar are multiplying.But then,in reality,we continue to design as we have always done for the last ninety years:with the consolidated rules and formal solutions of international post-modern composition,in its various forms.The only attentions are(and not always)to super-insulate the envelopes,arrange photovoltaic panels on the roofs,make the systems smart and cover the facades and roofs with appropriate green washing.Even in the awareness that human settlements and cities are extremely complex phenomena,mostly determined by economic and social factors,rather than by conscious typological-settlement choices,perhaps the time has come to acknowledge that the traditional paradigms of design must be changed.First of all,the types of settlements must be renewed,because it is through their optimization that the greatest savings in terms of energy and sustainability can be achieved.The research presented here is the application of a ten-year study that involved the development of net Zero Energy Mass Custom Housing(ZEMCH)in specific context in southern Italy.The Innovation and Transparency of Tenders Environmental Compatibility(ITACA)Assessment Protocol,derived from the Green Building Challenge’s GBTool,was used as a design guide,which is normally used for the assessment and judgment of sustainability at the building scale and not of the urban design.The result is a settlement model in which network of pedestrian,cycle and public transport is fully integrated with adjacent urban areas;effective landscaping connects public and private green and kitchen-gardens/orchards everywhere;buildings are made with new semi-underground typologies;net ZEMCHs are made with local,recyclable materials with low impact or positive energy balance;wastewater and rainwater are collected,in-loco phyto-purified and reused;renewable energies(sun,earth,wind)satisfy remaining necessities,with a minimum of plant interventions.

Green Affordable Social Housing: A Survey-Based Passive Cooling Design, with Focus on Jakande Housing Estate in Lagos, Nigeria

With rising health risks escalating from temperatures in the Global South, the shortage of essential indoor cooling is frequently seen as a dimension of energy poverty and human wellbeing. As a result, this study assessed ventilation and passive cooling in Jakande, Lagos Housing estate to design social housing that integrates proper cross ventilation and cooling. A total of 1215 housing units in the estate were used for the sampling frame. Based on the survey, the authors proposed an analytical housing design equipped with urban greenery that allows for free air movement with minimal thermal discomfort. The design methodology aids continuous cooling within the housing envelope and also improves aesthetics and landscaping within the environment.

Smart Building Design to Improve the Energy Consumption at an Office Room

Buildings are becoming smarter as a result of a variety of advanced technologies that enable energy management, optimal space utilization, and smart surveillance for safety, among other things. Energy-efficient smart building ideas and execution are of great interest and top priority due to the building’s occupants’ misused and high-power consumption. This paper addresses the design and execution of an energy management system that includes a solar power system for generating power for the building’s needs and a PIR-based automation system for efficient power use. This project was carried out at the Military Technological College (MTC) in Muscat, in the system engineering department’s offices. This project seeks to generate power for the building’s energy needs using solar photovoltaic panels and reduce energy consumption within the office using a PIR-based automation system. The results demonstrate that after the breakeven point (the time it takes to recoup the initial investment), it can provide power to the building for another 17 years. The calculations and practical results presented in this study approve that the system is extremely helpful.

Experimental Study to Evaluate the Performance of Iraqi Passive House in Summer Season

lraq locates in hot arid region （30 °N-37 °N）, where the hot summer season is very long and the ambient temperature is about 50 ℃. Cooling of building needs A/C （air-conditioning） system which consumes more than 60% of the total electricity supplied to residential building. So, there is really need to minimize the energy consumption by enhancement the performance of Iraqi buildings using passive house technique. This paper presents the thermal performance ofa Passivhaus model built in Kirkuk （35 °N）. The design depends on the using of suitable materials, sufficient insulation, well airtightness and underground air cooling. The experimental measurements take in consideration several parameters like ambient temperature, solar radiation, orientation of the building and duration. The results give good indication of the benefit of using this technique of passive cooling system in Iraqi residential buildings. The indoor temperature could be reduced to 30 ℃, while, the energy consumption for cooling could be saved up to 80%.

Evaluation of the Thermodynamic Performance of the Traditional Passive Systems

The energy consumption of buildings in urban areas is one of the greatest source of energy wasting and, consequently, ofincreasing of CO2 emission. Research is currently focused on the reduction of this consumption through the use of passive air-conditioning systems, that can be integrated with conventional systems and give rise to the so-called hybrid systems. Historically, these passive systems were developed in the Mediterranean and Middle East area. The research approach on this topic involves the application of design strategies and the development of computational tools and control systems. The development of the hybrid systems is the result of the synergy between current scientific knowledge, advanced manufacturing and information technology. In this study, a modular housing system has been investigated under different conditions. Simulations have been repeated, in order to identify the configuration that provides the highest indoor comfort. The analysis of the different conditions has been carried out using a CFD （computational fluid dynamic） software. The paper shows the results developed by the Dipartimento di Architettura of the Universit^t di Palermo in the analysis of the natural ventilation effect on the indoor comfort.

“绿数互联”——基于蒙德里安新造型主义的展览建筑节能技术研究

在建筑的全寿命周期内,最大限度地节能减排是建筑设计的趋势。文章以蒙德里安造型的展览建筑为例,提出将参数化设计与性能模拟技术相结合,并在建筑设计阶段融入绿色建筑技术的新思路,以此提升绿色建筑设计的效率和质量。

A MODEL OF A NEAR-ZERO ENERGY HOME(NZEH)USING PASSIVE DESIGN STRATEGIES AND PV TECHNOLOGY IN HOT CLIMATES

INTRODUCTION Recent development has seen a drastic increase in energy use trends in Saudi Arabian buildings leading to a demand for an effective course of action for energy conservation and production.A case study-based research initiative explor-ing near-zero energy potential in Saudi Arabia was undertaken.A 4-bedroom detached single-family faculty residence at King Fahd University of Petroleum and Minerals(KFUPM)representing common regional housing design trends was utilized.A base case simulation model of the house was developed and val-idated using short-term and real-time energy consumption data.Three sets of strategies:passive design strategies,representative codes and standards,and renewable technology were employed in the new design of the house.Passive strategies com-prised a green roof,a ventilated wall system,a sloped roof,and insulation for thermal bridges.These alternatives helped reduce the annual energy consumption of the house by 17.2%.The most recent version of the International Energy Conserva-tion Code(IECC 2012)was also incorporated along with ASHRAE Standard 62.2 for ventilation.The code and standard together reduced the annual energy consumption by 31.1%.Solar PV was then utilized to reduce grid utilization for the remainder of the house energy loads.This strategy provided 24.7%of the total energy consumed annually.A combination of strategies showed a 70.7%energy consumption reduction,thereby decreasing the energy index of the house from 162.9 to 47.7 kWh/m^(2)/yr.The Zero Energy Building(ZEB)concepts and strategies utilized in this study demonstrate a socially responsible approach to achieving near-zero energy performance for an existing house.

浅谈被动式建筑外窗节能技术研究

近年来,全球对建筑能耗的关注度越来越高,被动式建筑项目也随之逐年增多。窗户作为被动式建筑能耗最重要的组成部分也备受关注,本文从被动式建筑外窗能耗角度分析,节能技术在建筑外窗的使用对建筑总能耗的影响。通过对被动式建筑外窗节能因素的分析,希望能够对相关专业人员进行启发,为将来研发更加绿色节能的外窗等工作提供参考。

Analysis of the effect of passive measures on the energy consumption and zero-energy prospects of residential buildings in Pakistan

Climate change can adversely impact the thermal comfort and energy efficiency of the buildings stock. The South Asian countries are particularly vulnerable to the adverse impacts of climate change specially in the form of rising temperatures and increasing frequency of heat waves. The passive building design measures can be useful in mitigating and adapting to the climate change by increasing energy efficiency and reducing greenhouse gas (GHG) emissions. In this study various passive climate change adaptation measures (PCAMs) have been used individually and in form of combinations in order to analyze their impact on the energy efficacy of residential buildings in Pakistan. It has been found that the natural ventilation and front green wall are the most efficient options for reducing the overall energy consumption. By implementation of these PCAMs, cooling demand can be decreased by 27.75% while heating demand can be reduced by 35%. Secondly, the prospect of net zero-energy building and reduced CO2 emissions are also studied. It has been shown that building can achieve net-zero energy on an annual basis at every orientation and it can attain the status of nearly zero-energy building on a monthly basis. Moreover, emitted CO2 can be reduced by 31% by using the renewable energy.

太阳能被动式通风与建筑相变蓄热耦合技术研究进展

太阳能被动式通风(Solar Passive Ventilation,SPV)技术与建筑相变蓄热(Building Phase Change Heat Storage,BPCHS)技术是当前建筑节能的有效策略,两者有机结合能够显著提高太阳能利用效率、降低建筑能耗与改善室内热环境。通过对国内外有关文献调研分析,概述了太阳能被动式通风与建筑相变蓄热技术各自原理与分类,同时阐述了技术特点及其研究进展。基于太阳能被动式通风与相变蓄热在建筑应用的现状,论述了相变蓄热强化太阳能被动式通风原理及其有机耦合形式,包括相变Trombe墙、相变烟囱、相变通风屋顶等多种结合方式。此外,为了有效反映被动式通风特征与相变蓄热耦合流动-传热过程,系统总结了通风数值模型、相变蓄热求解模型以及耦合系统模型与相关实验研究。概括了太阳能被动式通风与建筑相变蓄热耦合(SPV-BPCHS)技术关键影响因素及其评价指标,指出了其对建筑室内热环境影响特性。调研结果表明,SPV-BPCHS技术能有效降低建筑能源消耗、提高太阳能建筑利用率和改善室内热环境效果,但仍应加强对高效低碳材料的研究及耦合技术稳定性研究,同时该耦合技术实验可行性也需要进一步验证。将为提高太阳能利用率和建筑室内环境耦合强化提供新的技术途径。