多层反射型保温材料传热优化分析

本文对影响多层圆筒反射型保温结构热流量及当量热系数的各种因素进行了定量分析，并着重分析了间距对隔热保温效果的影响，计算了在不同黑度条件下热流量最小的间距分布（最佳间距分布），提出了多层圆筒型反射型保温结构的阶跃分布间布置设想，与等间距结构相比，得出这种新型结构有助地改善隔热保温效果。提出了改善隔热保温效果一些措施。     

气凝胶复合保温材料在换热站中的应用

气凝胶复合制品在热力管网中应用优势极大,气凝胶与纤维材料复合改变了原材料的传热行为,增强了传热效果。通过对换热站供热主管道的保温理论计算数据、实际测量数据的分析,展示了气凝胶复合保温材料在换热站应用的节能效果,并建立气凝胶传热行为的数学模型,通过有限元分析软件对模型参数进行计算,为管道保温计算提高有效的理论基础。     

建筑节能改造中内保温构造技术的应用

文章介绍了建筑节能改造中内保温构造技术的应用要点;阐述了建筑节能改造中内保温构造技术的应用实践,包括墙体节能方案优化、热工学计算模型和热传系数计算、墙体内保温构造基础节能效果分析,以期提高建筑体的整体保温隔热性能。     

哈尔滨市泰海小区节能措施综合分析

泰海小区为中法建筑节能合作的示范工程，以建筑节能50％为目标，泰海小区R建筑围护结构和供热系统采取了节能措施。通过计算对泰海小区的围护结构采取的节能措施进行了分析，并通过测试对计算的结果进行了验证，充分说明了采用外墙外保温，屋面采用高效保温材料进行保温，单框双玻塑钢窗是严寒地区围护结构节能的有效措施。但同时也指出建筑节能应做到节能的围护结构和供热系统相协调，以实现节能建筑真正地节约能源。     

计量供热对建筑节能的影响

结合计量供热的特点，分析了不同外墙保温形式的优缺点，并利用内部结露验算，比较了外墙外保温与内保温的差别，提出了节能建筑内墙保温的必要性。     

改良型中档温室供热系统的研究和设计

农业温室是具有必要技术设备的，能够常年为作物生长和发展提供所需条件的特殊建筑物，温室是一个特殊的生产车间、冬季供热。本文结合课题研究和示范工程温室的设计，着重介绍了温室的型式、覆盖材料、热负荷计算、温室的供热系统型式以及节能运行方式等。     

严寒地区节能住宅实测分析

严寒地区实现建筑节能50％，对建筑围护结构保温提出了较高的要求，难度较大，哈尔滨市人和名苑节能小区从规划，单体设计节能，围护结构保温，供热系统可调节，可计量等几个方面实现建筑节能50％的目标，比较了计算和实测的耗热量指标及传热系数，并分析了哈尔滨市人和名苑建筑节能综合措施，同时对该小区的效益进行简单分析。哈尔滨市人和名苑节能小区的实测结果证明，在严寒地区实现建筑节能第二阶段目标是完全可能的。     

小区供热节能改造的新尝试

通过对数个小区供热系统节能情况的调研，证明供热水系统失调和建筑物围护结梅的保温性能差是建筑耗能的主要原因。按照分阶段实现民用建筑节能目标的要求，在对供热系统进行改造的同时，抓住住户房屋装修改造的机会，引导住户将房屋的保温改造纳入到装修项目中。通过在两方面的共同努力，解决了供热系统失调问题，提高了供热质量，降低了运行费用。更重要的是通过改造工程的实施，将建筑节能的理念全方位的体现出来，为今后同类小区进行节能改造提供可借鉴的经验。     

变频器控制在供热系统中的节能效果分析

本文阐述了变频器的工作原理和控制方式及其在供热循环系统中的应用与节能效果。分析了其结构及工作原理。理论联系实践证明了变频调速控制对供热系统显著的节能效果,定量地分析计算出节能比例。     

地热水温室供热系统的优化设计

将地热水作为农业温室的热源,温室内采用地面辐射供暖技术,充分利用地热资源,降低地热尾水温度。介绍了地热水温室供热系统的流程,计算了温室供热系统的热负荷。结合工程实例,以费用年值为经济指标,对供热系统的设计参数进行了优化设计。     

北方地区低能耗自循环农村住宅实践性能分析

生态家园以燃池技术为基础,以农作物废弃的资源作辅助能源,以太阳能为辅助动力,全面系统地解决了农民住房、做饭、取暖、洗澡和畜禽养殖、棚菜生产的全部用能。该模式在辽宁西部地区实践,通过分析生态家园自循环原理,实测实际运行效果,温室大棚可保证一年四季正常运行,冬季农民住宅室内热舒适性明显提高。该模式最大限度地利用了农业废弃资源,实现了低能耗高舒适运行。     

Building typologies as a tool for assessing the energy performance of residential buildings - A case study for the Hellenic building stock

Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of model buildings with characteristic energy-related properties representative of a country's building stock. The model buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.     

Thermal modeling for greenhouse heating by using thermal curtain and an earth–air heat exchanger

In this paper, a thermal model for heating of greenhouse by using different combinations of inner thermal curtain, an earth–air heat exchanger, and geothermal heating has been developed. The analysis incorporates the study of thermal performance of three-zone greenhouse. The calculations have been made for a typical production greenhouse in southern part of Argentina; available climatic data has been used. The thermal performance of a greenhouse having thermal curtain and an earth–air heat exchanger has been compared with a greenhouse having thermal curtain and geothermal energy. It is seen that the fluctuations in temperature in the vicinity of plants are comparable in the two cases. From the results, it is seen that an earth–air heat exchanger might prove an alternative source for heating of greenhouse when geothermal energy is not available. It has also been observed that, the increase in temperature of zone I is more for the greenhouse with geothermal than the greenhouse with an earth–air heat exchanger.     

温室节能的设计与运行研究

随着最近几年经济与科技的长足进步,我国在温室系统建设上投入的人力、物力、财力也越来越大,支持温室系统运行的设施设备也融入了更多的高科技元素。在温室系统设计向着更深方向发展的同时,温室系统的应用也走向了更广阔的市场,为更多的国家和地区所应用。温室系统已初步形成从设计施工、设施配备到安装调试等一系列的产业链条,走向了全行业产业化的道路。温室节能技术作为温室系统产业链上不可或缺的一环,已成为现代园林园艺设备研究的主要方向之一。以温室采暖系统作为设计基石,在确保温室系统能够稳定高效运行的背景下,对温室采暖方式种类与特点进行总结概括。基于此,对温室节能进行合理的设计,目的是使得温室生产达到高产、低耗的效果。对温室采暖节能系统运行做了有效的评价。     

CFD modelling of transparent bubble cavity envelopes for energy efficient greenhouses

Traditional greenhouses with single glazing have very poor thermal performance and the energy use for providing a productive internal environment is high. A cavity envelope formed by two transparent membranes and filled with transparent liquid bubbles can provide the greenhouse with super thermal performance. The liquid bubbles in the cavity transmit daylight while providing a thick blanket of insulation, thus reducing heat losses in winter and solar gains in summer. A computer model has been developed to simulate the thermal performance of a transparent bubble cavity envelope and the internal environment of the greenhouse. It has been found that the cavity convective heat transfer coefficient, equivalent thermal conductivity and thermal transmittance of a transparent bubble cavity envelope increase with bubble diameter and porosity as well as the internal–external temperature difference when bubbles are not compact in the cavity. The equivalent thermal conductivity and thermal resistance also increase with cavity width but the cavity convective heat transfer coefficient and thermal transmittance decrease with the increase in cavity width. A greenhouse with the transparent bubble cavity envelope has a better thermal environment with a significantly less energy requirement than does a traditional greenhouse.     

外墙保温对不同地区大型公共建筑冷热负荷的影响分析

随着我国建筑总量的增加,建筑能耗急剧上升,已成为我国的能耗黑洞,随之建筑节能逐渐被广大公民重视.目前建筑节能有很多措施,外墙保温就是其中一项.采用建筑热环境模拟工具DeST对同一大型公共建筑的冷热负行模拟计算,分析了在不同建筑气候分区下外墙的保温层厚度对空调负荷的影响,分析其有无节能效果,可为不同气候分区的大型公共建筑外墙隔热保温提供参考依据.     

上海既有公共建筑节能改造方案对比分析

以上海市某酒店建筑为对象,按照《公共建筑节能设计标准》对其围护结构进行了节能改造设计,对比分析了改造前后建筑空调负荷组成的变化,并对外墙改造和外窗改造带来的节能效益进行了对比.结果显示,在上海进行类似的公建节能改造中,应该首先进行外围护结构的改造,尤其是建筑外窗的改造具有比较高的节能效果.     

EnergyPlus在日光温室热环境模拟中的应用验证与分析

为了寻求将现有商用能耗分析软件应用于日光温室热环境的设计、优化、建造和日常运营管理的方法,基于EnergyPlus软件,建立了日光温室模型,通过现场实验测试对所建立的模型进行了验证,并利用建立的模型对日光温室热环境进行了模拟分析。研究结果表明:提出的数值方法和建立的日光温室模型是正确可靠的,可以用于日光温室热环境的模拟分析;温室北墙夜间单位面积的供热量是东、西墙与地面总和的1.1~1.2倍,增强日光温室北墙体的蓄热和保温能力是提升日光温室调控自身热环境能力和水平最重要的途径。该研究结果可为日光温室的优化设计与热工性能分析提供参考。     

玻化微珠保温混凝土初探

介绍了一种新型节能建材玻化微珠保温混凝土.先从理论上分析,在常规混凝土中加入一定比例的玻化微珠,混凝土的导热系数大大降低.然后,通过试验研究来探索玻化微珠混凝土导热性能、强度及工作度随玻化微珠掺量变化而变化的情况.从而验证了玻化微珠保温混凝土是一种结构兼保温新型的节能建材.     

Study on energy efficient envelope design for telecommunication base station in Guangzhou

Telecommunication base station (TBS) buildings have large numbers, high energy consumptions and great potentials on energy conservation. Through field investigation of a typical TBS in Guangzhou, the basic information of TBS was achieved, the key factors influencing energy consumption of TBS were determined and several energy efficient envelope designs were proposed. The effect on annual cooling load was analyzed for each energy efficient design and the combined effects were achieved for several combinations of the designs by thermal simulation. The energy efficient design strategy of building envelope for TBS in Guangzhou was proposed.