合肥火车南站自然通风计算分析

通过借用能耗分析软件 EnergyPlus 对合肥南站进行的自然通风模拟，得出当旅客人数在两万人时，在不同开窗面积情况下，该站在过渡季节逐时的换气次数和逐时的人均新风量，为设计人员提供参考。     

Case study of zero energy house design in UK

Possible solutions for zero energy building design in UK are discussed in this paper. Simulation software (EnergyPlus and TRNSYS 16) are employed in this study, where EnergyPlus simulations are applied to enable facade design studies considering building materials, window sizes and orientations and TRNSYS is used for the investigation of the feasibility of zero energy houses with renewable electricity, solar hot water system and energy efficient heating systems under Cardiff weather conditions. Various design methods are compared and optimal design strategies for typical homes and energy systems are provided.     

Energy savings modelling of re-tuning energy conservation measures in large office buildings

Today, many large commercial buildings use building automation systems to manage a wide range of equipment. This paper investigates the energy savings potential of several common heating, ventilation, and air conditioning (HVAC) system re-tuning measures on a typical large office building using the EnergyPlus software. Individual re-tuning measures simulated include automatic schedule adjustments, damper minimum flow adjustments, thermostat adjustments, as well as dynamic resets to static pressure, supply-air temperature, condenser chilled- and hot-water temperatures, and chilled and hot water differential pressure set points. All individual measures and combinations were simulated in 16 locations representative of different climates in the USA. Many of the demand-side individual measures were capable of reducing annual HVAC energy consumption by over 20% in most cities. Supply-side measures affecting HVAC plant conditions were only modestly successful (less than 5% annual HVAC energy savings). Some of the combinations revealed between 35% and 75% HVAC energy savings.     

变频多联空调能耗仿真程序的开发研究

为了评价变频多联空调系统在建筑应用中的能耗特性，在通用软件Energy Plus基础上编写相应的计算模块，在室内设定温度分别为22℃，24℃，26℃，28℃的情况下对变频多联空调系统的性能系数和部分负荷比，以及室外温度和机组能耗的关系进行计算分析，并与文献中的实验结果作对比验证。结果表明，变频多联空调系统在部分负荷工作条件下具有优秀的节能特性。     

某大型公共建筑全能耗模拟和节能潜力分析

本文首先介绍全建筑能耗模拟软件EnergyPlus的性能和特点,重点说明它在模拟大型公共建筑时所具有的优势.通过比较EnergyPlus与其他能耗模拟软件的特点,讨论了如何使用EnergyPlus最大限度地反映建筑各系统如空调系统、照明系统、生活热水系统等的复杂构成及它们之间的相互耦合关系.然后采用EnergyPlus对拟申请美国LEED绿色建筑认证的某大型公共建筑进行能耗模拟并计算全年能耗费用.按照LEED标准的要求建立ASHRAE基准模型,通过比较ASHRAE基准模型和设计模型的全年能耗,讨论有效降低建筑全年能耗的途径并建立节能模型.在节能模型中,透明围护结构的遮阳性能得以加强,建筑系统中部分设备的效率得以提高,并引入日光照明、人员传感器等技术.结果表明,本文提出的节能模型与ASHRAE基准模型相比,全年耗电量减少了4.7%,全年耗气量增加了6.9%,全年电费减少了14%,全年总能耗费用减少了7.75%.     

变频多联空调能量特性的建模和仿真

为评价变频多联空调(VRV)的能耗特性,基于美国能源部动态建筑能耗模拟软件EnergyPlus开发了VRV的能耗计算模块。利用一实际建筑作算例,在不同室内设定温度、不同室内机开停台数的情况下对变频多联空调系统的性能系数和部分负荷比以及室外温度和机组能耗的关系进行了计算分析,并与文献中的实验结果作了对比验证。结果表明,所开发的计算模块能够较好地分析变频多联空调系统的能耗特性。     

上海某大学体育中心能耗分析

应用EnergyPlus能耗模拟软件对上海某大学体育中心进行能耗模拟。其中建筑几何使用De-signBuilder软件建立,而后利用EnergyPlus进行空调建模并计算能耗。在此基础上,由于各个场馆使用情况的不同,挑选典型日对篮球比赛、游泳比赛、羽毛球比赛这三种典型情景分别模拟,计算其能耗,并分析能耗特点,在一定程度上预估该体育中心投入使用后的耗能情况。     

变频空调制热工况仿真模块的开发与实验研究

在美国能源部动态建筑能耗模拟软件EnergyPlus的基础上,提出适合于动态能耗计算的变频多联空调（VRF）能耗算法,并开发相应的计算模块;同时,建立VRF实验测试系统,在冬季测试数据的基础上,进行能耗仿真比较验证。结果表明,平均供热量和耗电量误差分别为34．97％和26．51％,VRF能耗计算模块能够追踪EnergyPlus负荷计算的精度,并且正确反映机组的能耗特性。     

Overheating in English dwellings: comparing modelled and monitored large-scale datasets

ABSTRACT

Monitoring and modelling studies of the indoor environment indicate that there are often discrepancies between simulation results and measurements. The availability of large monitoring datasets of domestic buildings allows for more rigorous validation of the performance of building simulation models derived from limited building information, backed by statistical significance tests and goodness-of-fit metrics. These datasets also offer the opportunity to test modelling assumptions. This paper investigates the performance of domestic housing models using EnergyPlus software to predict maximum daily indoor temperatures over the summer of 2011. Monitored maximum daily indoor temperatures from the English Housing Survey’s (EHS) Energy Follow-Up Survey (EFUS) for 823 nationally representative dwellings are compared against predictions made by EnergyPlus simulations. Due to lack of information on the characteristics of individual dwellings, the models struggle to predict maximum temperatures in individual dwellings and performance was worse on days when the outdoor maximum temperatures were high. This research indicates that unknown factors such as building characteristics, occupant behaviour and local environment makes the validation of models for individual dwellings a challenging task. The models did, however, provide an improved estimate of temperature exposure when aggregated over dwellings within a particular region.     

Development of building energy asset rating using stock modelling in the USA

The US Building Energy Asset Score helps building stakeholders quickly gain insight into the efficiency of building systems (envelope, electrical and mechanical systems). A robust, easy-to-understand 10-point scoring system was developed to facilitate an unbiased comparison of similar building types across the country. The Asset Score does not rely on a database or specific building baselines to establish a rating. Rather, distributions of energy use intensity (EUI) for various building use types were constructed using Latin hypercube sampling and converted to a series of stepped linear scales to score buildings. A score is calculated based on the modelled source EUI after adjusting for climate. A web-based scoring tool, which incorporates an analytical engine and a simulation engine, was developed to standardize energy modelling and reduce implementation cost. This paper discusses the methodology used to perform several hundred thousand building simulation runs and develop the scoring scales.