住宅供暖方式比较分析

针对我国目前存在多种住宅供暖方式,文章对散热器供暖、低温水地板辐射供暖、电热供暖、分户独立燃气供暖等多种供暖方式进行了比较分析.     

民用住宅低温热水地板辐射采暖施工技术

1　前言随着我国房地产业的蓬勃发展 ,各种新技术、新材料在住宅建筑中得到充分的开发和应用。不论是使用了几十年的燃煤锅炉供暖 ,还是近两年开发应用的燃气燃油供暖以及既占用室内空间又妨碍美观的铸铁散热器片的采暖方式 ,都有了较大的改进。国外低温热水地板辐射供暖技术在住宅中的应用已趋于成熟。低温热水地板辐射技术是一种新的供暖方式 ,以其舒适、卫生、不占使用面积、高效节能、热稳定性能好、运行费用低等优点在我国北方地区和沿海发达省市已开始推广采用。石河子市东苑置业有限公司为适应市场需求 ,响应国家推广应用新技术、新…     

浅谈地板采暖常用塑料管材的选用

低温热水地板辐射供暖是一种新型、节能的采暖方式.对地板采暖常用的塑料管材的性能进行了分析比较.综合分析比较得出,PE-RT管材是性价比较好的地暖用管,具有较高的环保性能,修复方便可靠.     

恒温供暖的推广及其应用

本文推广一种新型高效节能供暖方式——恒温供暖,并说明了应用这种供暖方式,对实施恒温供暖及其产生社会经济效益。     

关于高大铝加工厂房采暖的探讨

高大厂房建筑因体量大造成温度梯度大、温度分布不均匀困扰了不少设计人员。燃气红外线辐射采暖技术是一种低强度远红外辐射采暖技术,以其均匀舒适的供暖性能、高效节能的运转方式、保护环境和安装方便等优良特性在大空间建筑采暖方面备受青睐。     

地板辐射采暖的传热特性分析

能源问题是当今社会的最主要的问题,节约能源已经成为多次联合国大会的主要主题.低温热水地板辐射采暖技术就在这样的世界性大潮中应运而生的.低温地板辐射采暖不仅有节能、舒适、卫生条件好.能充分利用各种低品位热源等优点.因此,对低温热水地板辐射采暖的传热性能及实际应用进行研究是很有必要的.     

低温热水地面辐射供暖的监理控制

热水地面辐射供暖具有节能、卫生、不占室内空间等优点,监理过程中发现很多不规范的做法。本文结合该施工中的一些具体问题予以分析,提出了现场监理过程中应该注意的一些问题。     

四方金矿空压机热能回收系统应用实践

分析了四方金矿原供暖设备应用过程中存在的问题,针对空气压缩机应用过程中大量余热散失浪费的现状,对空气压缩机进行了热能回收系统技术改造,采用空压机余热供暖替代了原来的锅炉供暖,并分析、阐述了热能回收系统项目的应用特点、改造效果和推广应用情况。生产实践表明:将空压机运行时产生的余热供暖代替原来的供暖方式,起到了节能减排的效果,取得了良好的经济效益和社会效益。     

低温热水地板辐射采暖在冶金工程的应用

低温热水地板辐射采暖是一种新型应用,它具有舒适、节能、节约空间等优点。本文介绍了低温热水地板辐射采暖在冶金工程的应用,对材料选择、地面构造以及加热管的布置形式进行了详细介绍,对设计要点以及应注意的问题进行了剖析,同时对地暖优点进行了说明。     

赣南地区低温地板辐射采暖效果研究

赣南地区属于夏热冬冷地区, 被列为非采暖区, 冬季室内热舒适性较差.由于各方面的原因, 人们对居住环境的要求越来越高, 迫切需要改善室内热舒适性.结合赣南地区冬季气候及地域特点, 研究低温地板辐射采暖的效果, 并与空调采暖进行对比.利用CFD理论分别对该采暖室在2种采暖方式下的室内热环境进行数值模拟, 分析室内空气温度场、湿度场, 并用PMV-PPD评价指标对室内热环境进行评定.研究表明, 与空调采暖相比低温地板辐射采暖:室内热环境更加舒适; 室内设计温度可降低2~3℃, 能节约15%的能量, 有利于节能环保.      

Thermal comfort in offices:comfort values and optimization of indoor control variables

In order to search for reasonable air-conditioned indoor control variables and save energy consumption and meet tO need of personal thermal comfort,a method which is based on numerical simulation is employed to optimize indoor control variables.Computational fluid dynamics(CFD)is used to describe thermal state of office.An optimal method is proposed in this paper,dual neural network model is firstly used to acquire reliable information,data from CFD model are pre-processed,and the remaining data are used to train artificial neural networks(ANN),then CFD model is replaced by ANN model to reduce computational cost when is optimized,indoor control variables are optimized by genetic algorithm.Simulation results show that indoor thermal comfort is improved obviously,and the energy cost is decreased accordingly.     

快速对流加热技术及其在锻造炉中的应用

对快速对流加热的热工新技术进行了系统介绍,分析了具有代表性的金属冲击加热、强制循环对流加热、对流脉冲加热技术的传热特点与节能降耗、改善加热质量的实践效果,还指出了应用过程中应注意的问题.     

热水供暖的水温调节与节能

应根据供暖建筑室外空气的实际温度进行热水供暖的水温调节，既可以稳定室内供暖温度，又利于节能，提出了水温调节的方法和措施。     

首钢京唐2250加热炉黑匣实验

为了检验板坯加热质量,评价现有的加热制度,对加热炉实施了板坯在线温度测试分析,即黑匣试验。通过对试验结果进行技术分析,说明加热炉的板坯加热质量良好。同时发现了目前加热制度中存在的一些问题,为下一步优化加热制度提供了指导。     

Environmental Comfort Criteria: Weighting and Integration

This paper presents an integration method for evaluating environmental quality in office buildings based on a series of interviews with 50 experts in the field of environmental quality in the built environment. A structured questionnaire was completed by experts during the interviews. The categories of environmental quality considered in this evaluation include lighting comfort, acoustic comfort, thermal comfort, and acceptable indoor air quality. Each category includes a set of performance criteria. Sixty-five performance criteria covering the evaluation of environmental quality in office buildings were extracted from the interviewed experts. The development of this integration method for assessing the environmental quality of built environments is described and an illustration of its application is presented.     

Pilot Study for the Performance of a New Demand Control Ventilation System in Hong Kong

There are different ventilation control methods for outdoor air quantity in air-conditioned spaces to reduce the energy consumed in cooling the outdoor air. Demand controlled ventilation (DCV) is an important strategy to control the outdoor air quantity. However, the current practice in DCV systems creates several problems for air-conditioned office buildings. Although metabolic carbon dioxide (CO2) concentration is mainly used as a surrogate indicator for ventilation adequacy, the conventional DCV system does not seriously consider the placement location of the CO2 sensor, and it does not take into account the adverse effects of the consequential increase in pollutant concentrations in the indoor space when the fresh airflow rate is reduced. In this study, a long period of subjective and objective measurements were conducted in an occupied office to examine its suitability for conversion to a new demand controlled ventilation system (nDCV). After the feasibility investigation, an nDCV system was developed to optimize the energy consumed for outdoor air ventilation while providing the desirable thermal comfort and indoor air quality. The true optimization of this nDCV is achieved by a new concept of the optimized indoor air quality window which determines the most representative locations for the indicator sensors. A minimum ventilation rate is determined by a calibration procedure for the pollutant inventory of a building, taking into account the infiltration characteristics. Radon gas, which is a notorious carcinogenic indoor pollutant, is used as a reference to determine the minimum fresh airflow rate. The findings show that this nDCV system reduced 16% of fresh air cooling energy consumption without jeopardizing the thermal comfort and indoor air quality.     

低温辐射电热采暖

介绍美国凯乐瑞克公司生产的电热膜、挪威阿尔卡特发热电缆低温辐射采暖可控温度的优越性。     

Influence of localized auxiliary heating on hand comfort during cold exposure

There is a need for a hand-heating system that will keep the hands warm during cold exposure without hampering finger dexterity. The purpose of this study was to examine the effects of torso heating on the vasodilative responses and comfort levels of cooled extremities during a 3-h exposure to -15 degreesC air. Subjects were insulated, but their upper extremities were left exposed to the cold ambient air. The effect of heating the torso [torso-heating test (THT)] on hand comfort was compared with a control condition in which no torso heating was applied, but Arctic mitts were worn [control test (CT)]. The results indicate that mean finger temperature, mean finger blood flow, mean toe temperature, mean body skin temperature, body thermal comfort, mean finger thermal comfort, and rate of body heat storage were all significantly (P < 0.05) higher on average (n = 6) during THT. Mean body heat flow was significantly (P < 0.05) lower during THT. There were no significant differences (P >/= 0.05) in rectal temperature between CT and THT. Mean unheated body skin temperature and mean unheated body heat flow (both of which did not include the torso area in the calculation of mean body skin temperature and mean body heat flow) were also calculated. There were no significant differences (P >/= 0.05) in mean unheated body skin temperature and mean unheated body heat flow between CT and THT. It is concluded that the application of heat to the torso can maintain finger and toe comfort for an extended period of time during cold exposure.     

单蓄热式单侧供热加热炉的改造与应用

山东石横特钢中型材车间对加热炉进行了技术改造,新改造设计的加热炉既能燃热煤气又能燃天然气,并采用蓄热式高风温燃烧技术和脉冲燃烧控制系统相结合的最新技术,单蓄热式单侧供热,具有热效率高,易于控制炉温,环保等诸多优点。