开窗位置对室内风环境的影响

通过STAR-CCM+计算流体模拟软件,基于不同开窗位置的通风效果比较,以室内平均风速等参数作为通风效果的评价指标,对室内风环境进行了模拟与分析,提出关于建筑自然通风设计中开窗优化在实际项目中运用的必要性。     

某大楼冰蓄冷空调系统运行性能分析

该大楼采用冰蓄冷系统，简要介绍了冰蓄冷系统的主要设备、系统组成及其运行工况，对机组性能进行了测试与分析，提出了系统运行的有关建议。     

某制药厂房直流式空调系统排风的综合利用

结合某制药厂房工程概况,提出了空调系统的工艺流程,介绍了该工程空气调节系统的设计,对空调系统进行了整体分析,提出了合理的排风热回收方案,有效减少了能耗,促进了建筑节能的发展。     

建筑外窗气密性能现场检测方法探讨

介绍建筑外窗气密性能现场检测方法,包括检测原理、设备、方法、数值处理及结果评定,并结合空气渗透机理,提出加强外窗气密性能的方法,供相关检测及科技人员参考.     

论多联机空调系统设计中的几个问题

围绕商用多联机空调系统设计中存在的全热交换器选择、外机容量的确定、冷媒管长的修正、系统施工安装控制等问题,剖析了产生这些问题的原因,并探讨了解决问题的对策。     

某超高层项目空调水系统节能设计

以杭州某超高层建筑空调冷热源水系统为例,从设备承压、设备运行温度限制方面对空调水系统形式设计进行了论述,并分析了换热板换的位置不同及对供回水温度的影响,从而产生对水冷变冷媒流量(VRF)制冷制热效率的影响。     

某银行综合服务楼的空调系统改造

对原系统中存在的夏季排气压力超标,噪声高,冬季吸气压力偏低等问题进行分析,采取相应改造措施,工程改造结果表明;在石家庄地区的中小规模建筑中,夏季选用风冷式冷水机组配以蒸发冷却方式,与单独风冷式冷水机组供冷相比,制冷量提高９％,冬季利用蒸汽配以即热式汽水换热器供热与热泵供热方式相比,运行费用降低２０％,这种空调系统特别适合夏季相对湿度较低,冬季有集中供热的地区选用。     

建筑外窗气密性现场检测用的数据采集与分析系统开发

建筑外窗气密性是门窗性能指标中最重要的一项。本文根据建筑节能检测标准的要求,设计了外窗气密性现场检测系统的结构,利用LabVIEW软件平台开发出窗户气密性检测用的数据采集与分析系统。     

Real climate experimental study of two double window systems with preheating of ventilation air

This paper aims to characterize the thermal performance of a window system that consists in doubling an existing window, converting it into a ventilated double window. The air coming from the outside circulates upwards through the channel between windows and enters the building through a vent on the top of the window's case. A series of experimental measurements was conducted in a test cell exposed to real outdoor weather conditions located in a mountain region at Centre of Portugal, during heating season in order to determine how this window system can act as a heat exchanger. It was found that such window system act as an efficient heat exchanger using transmission heat losses and solar radiation to preheat ventilation air, thus reducing the building's operational energy costs. An average of about 19 m³/h of air flow rate was found with an air temperature increment within the air gap of about 6 °C, during night-time, for an indoor/outdoor temperature difference of about 16 °C. Air temperature increment reached up to 12 °C using a plastic shutter. With solar radiation, the average of that increment was about 10 °C. This is a simple and cheap building technology which can be implemented both in new and existing buildings.     

电动开窗器的特点及其在建筑自然通风中开窗控制的应用设计

本文针对建筑自然通风窗的驱动控制,讨论了电动开窗器的特点及应用设计.特别针对基于建筑自然通风中风压和热压作用下单体通风窗驱动时的开窗器及窗体选型的技术要点做了详细的阐述,并提出了基于自然通风原理的楼宇智能通风窗控制系统构成要素.     

CI engine performance during cold weather condition using preheated air and engine by waste energy

ABSTRACT

The aim of the current research is to experimentally investigate the performance, combustion and emission parameters of a compression ignition engine in the discharging and air preheating mode during the cold weather condition. For preheating the engine, a thermal energy storage device using phase-change material (PCM) and for preheating the inlet air an air preheater is used. From the results, it is observed that the engine temperature increases with time from 15°C to 27°C in 840?s. PCM temperature rises from 15°C to 60°C in 3000?s. during charging and while in discharging it decreases from 45°C to 30°C within the same time period. Brake thermal efficiency increases and brake-specific fuel consumption decreases with increase in load. Air-preheated diesel gives maximum cylinder pressure as compared to normal diesel. Carbon monoxide and hydrocarbon emissions are reduced during discharging and air preheating as compared to cold weather emission.     

酒店建筑能耗及空调系统能耗合理性评价

以实例分析了国内有代表性的大型酒店建筑近三年的建筑能耗、空调系统能耗和营业额现状,提出了可反映使用水平和营业水平的建筑能耗占用率Ijn作为建筑能耗的评价指标和空调系统能耗占用率Ijkn作为空调系统能耗的评价指标;通过统计分析给出了Ijn和Ijkn对应的节能型、合理型和浪费型三个评价标准的取值范围。通过对八家酒店使用该两项评价指标进行评价的结果,认为新指标的评价结论更准确、符合实际,可为酒店节能潜力分析和建筑能耗管理提供参考依据。     

关于高层建筑机械加压送风系统设计的探讨

针对高层建筑机械加压送风系统的设计问题,介绍了分设风机法、旁通法、变风量运行法三种解决方案,在旁通法的基础上,提出了使用地上风口泄风的新方法,并结合实例进行了验算,指出新方法具有系统简单、便于控制的优点。     

基于CFD技术的卫星容器通风系统研究

利用CFD技术建立了MEO双星容器通风系统的仿真模型,并对容器内部的温湿度场进行了数值模拟和实际检验,为卫星容器通风系统恶劣环境模拟测试和操作训练提供了理想的实验条件。     

Impact of heat load location and strength on air flow pattern with a passive chilled beam system

A passive chilled beam is a source of natural convection, creating a flow of cold air directly into the occupied zone. Experiments were conducted in a mock-up of an office room to study the air velocities in the occupied spaces. In addition, velocity profiles are registered when underneath heat loads exist and the cool and warm air flows interact. Experimental laboratory study revealed that in the case of the underneath heat gains, even no upward plume was generated and the dummy only acted as a flow obstacle, having a significant effect on the velocity profile. Furthermore, in an actual occupied office environment, the thermal plumes and the supply air diffuser mixed effectively the whole air volume. The maximum air velocity measured was still below 0.25 m/s with the extremely high heat gain of 164 W/m². The results demonstrate that analysis methods were the interaction of convection flow and jet are not taken into account could not accurately describe air movement and draught risk in the occupied room space.     

太空建筑的选址与结构探索

利用建筑学以及天文学等专业知识,对太空建筑选址与结构方面进行了分析和论述,提出了太空建筑的基本营造和扩展方法,有利于太空建筑的发展和研究。     

水冷空调系统设计及常见问题分析

对水冷空调系统设计及常见问题进行了分析,从空调冷源、冷冻（却）水系统、冷凝水系统方面进行了论述,提出了水冷空调系统设计方法,解决了设计中的常见问题,从而确保水冷空调系统正常运行。     

多联机分户计量系统及应用实例

近年来由于多联机的种种优势,使得其在中央空调市场的占有率稳步提升。相比传统的中央空调,多联机不仅具有设计灵活、安装便捷、节能环保、效果舒适、系统简单、稳定可靠、不影响建筑外立面美观及占地面积小等特点,其先进的独立控制功能及多样的控制管理方式更是一大亮点。本文针对多联机系统在公共建筑等项目的电费分户计量问题,进行具体的原理介绍及应用实例说明。     

暖通空调系统设计方向与施工质量控制

指出在科学发展观的指导下，对暖通空调设计方案进行优选并控制质量是设计与施工人员在实际工作中经常遇到的难题。根据工作经验，对暖通空调设计与施工的一些问题进行了分析，并提出了一些施工工艺方面的有益建议，以促进暖通空调行业的发展。     

地下水源水环热泵空调系统在某居住建筑中的应用

结合地下水源水环热泵空调系统在某居住建筑中应用的实例,简要分析了其特点,给出了室内空调系统、地下水系统的设计方法,以及系统变流量控制的要求.从系统配置、运行费用和环境效益等方面与家用分体空调进行了对比分析,总结得出地下水源水环热泵空调系统在节能和环保方面具有优势.