In this paper, a rural residential model located in Shenyang is established by simulation software DesignBuilder. Simulation process divided into the following conditions, variety of thermal performance walls, roofs and windows. Building energy consumption was simulated through EnergyPlus under different conditions. The information modelling are referred. Impact envelope heat for various saving potential analysed. This research provides technical support theoretical guidance new efficient...

A building envelope is a multi-layer porous structure. It transfers heat and moisture to balance the indoor outdoor temperature difference water vapor partial pressure difference. This typical coupled migration process. When space filled with moist air, or ice, it will directly affect thermal properties of material. With respect coming through wall into building, also environment energy consumption due formation latent heat. However, transfer process in envelopes not taken account current...

The building sector is one of the largest energy user and carbon emitters globally. To increase utilization rate renewable reduce dioxide emissions, optimal technical scheme active public institutions coupled studied. In this study, consumption three types in various regions China was simulated by using DeST software, combined with conversion efficiency data released National Bureau Statistics, total demand supply were predicted load density method. Based on coupling mechanism MARKAL model,...

Reviewing hygrothermal input data published in handbooks such as ASHRAE or ASTM, one often finds large range of variability hygric properties construction materials. Two factors that cause these results are uncertainty the test method and inadequate characterization material sample. Adequate tested sample, despite being most critical aspects any property measurement, is however frequently neglected. Yet, performing a high-precision when sample not adequately characterized does tell us what...

Appropriate location for installing purifier in the bedroom can improve air quality inside bedroom. With standard k-ε turbulence model, this paper made numerical simulation analysis of pollutant concentration distribution after installation indoor purification device, and found best place to put purifier. Numerical results show that formaldehyde is low strength intensity outlet. When device located opposite bed, effect best, speed also fastest.

In part 4 of this article series, we have proposed a set simple tests that is sufficient for estimating material characterization needed input to advanced hygrothermal models use in practical applications. Now, apply method the experimental product was intentionally designed contain large fraction micropores achieving moisture storage higher than traditional Portland cement plaster. The material, called here, eco-wrap or climatic stucco (in contrast plaster), has less natural and lime...

Among the many types of indoor pollutants, carbon dioxide has always been overlooked. This paper simulated and analyzed variety concentration office room over time under steady-state conditions natural ventilation based on CONTAM, aims to understand impact human body as a pollution source air quality produce, well role improve quality. For room, airflow paths upstream own far more effect IAQ than that downstream, so it is very important make sure smooth. Furthermore, not an optimal approach...

Source identification has been a challenging research topic in the area of indoor air quality which is an inverse problem physics and mathematics as process to find unknown causes from known consequences. This paper studied large number results predecessors, grouped pollutant sources methods into direct methods, probability statistics optimization methods. Although pollution source method made great progress, but still under experimental conditions, simulation was greatly simplified. The...

Reasonably use of natural ventilation is conducive to improving building energy efficiency and indoor air quality, In order explore the reasonable modes residential buildings in Shenyang. summer, through investigation analysis Shenyang, Analyzes situation Shenyang residents eliminate pollutants. Using CFD software Airpak 3.0 for numerical simulation analysis. Taking benzene as pollution source. Four different strategies are used simulate velocity field, concentration field mean age room....

Public institution building energy consumption is an important part of consumption. With the rapid spread HVAC systems, status increasingly prominent. Taking 16 typical public buildings Shenyang in cold region for example, this paper presents current problems existing system green retrofitting. Through transformation buildings, energy-saving effects demonstrate effectiveness

In the purpose of finding relationship between pore property and water absorbing concrete different strength, scanning electron microscope (SEM for shot) is used to observe in as well computer software gain box counting dimension, experiment also done figure out curve. It's found that has nothing do with strength concrete; C30 lowest dimension poorest ability among C20, C40.

This paper examines the effect of pollution source location on indoor pollutant distribution in different air supply systems. Airpak 3.0 software was used to separately simulate benzene concentration an office under natural ventilation, replacement ventilation and up-inlet down-outlet same side by changing position source. The results showed that most proper sources 3 three modes. And average various planes were relatively lowest for mode. condition at single return mode finally determined...

Energy-saving building quantitative assessment is often based on three major aspects. First, the energy consumption; second, human comfort; third, whole life cycle cost. The application of high-quality humidity-controlling materials will optimize these indicators. At present, active air conditioning adjustment also mainly used to meet internal humidity demand in China. Though it can comfort requirements architectural space, consumption large. It not accordance with sustainable development...

According to "Twelfth Five-year "comprehensive energy conservation program of work" (Guo Fa [2011] No. 26) the proposed objectives, in order reduce consumption public institution existing buildings cold region, institutions should be adapted local conditions carried green retrofit. Taking Shenyang as main object study, retrofit situation five typical sector was mainly surveyed. Through analysis survey data, combined with evaluation index system building, this paper will propose current...

The groundwater heat pump system is a new clean energy technology. Its attractive advantages of high efficiency, environmental friendliness and conservation had made itself favored by people. But there exist some problems in the application as well. "heat transfixion" one main reasons that hinder promotion In this paper, we use finite element program to establish transport model based on assumption basic conditions, using numerical simulation method study temperature field evolution GWHP...

Abstract In order to improve the air quality of offices with pollutant and reduce concentrations it satisfy demand workers for health. This paper simulated three different types supply, volume obtained indoor under ways emission power. The comparison results show that supply up-inlet down-outlet on same side have a better decontamination effect than other two supplies. Increasing quantity fresh can significantly pollutants, so does reducing emmision Results indicate if we want control...

The effect of concrete cracks on the evaluation thermal performance walls has not been effectively considered within assessment and hygroscopic buildings. Based dual permeability model, a conjugate method is proposed to reconstruct PDE equation unsaturated porous materials with cracks. reliability model verified from three angles: heat-moisture coupling benchmark matrix material, analytical solution two-dimensional single fracture heat flow problem moisture absorption perspectives:...

The airtightness defects in building components are mainly composed of thin air gaps caused by porous materials and assembly tolerances. Indoor outdoor leakage, as well risks such condensation mold growth the structure, will result significant heat loss. In this paper, a numerical model heat, moisture transfer (commonly called HAM transfer) between channel material is proposed. adopts single-domain modeling strategy without considering migration coefficient interface. A benchmark experiment...