供热节能评价体系及节能量建模研究

我国供热领域普遍存在高耗低效、热舒适性差的问题,作为促进和实现供热节能的有效手段,节能评价指标体系的建立与评价办法的研究成为亟待解决的重要课题.针对目前节能评价研究多注重定性分析,缺乏科学可行的量化评价问题,借助物联网技术,建立以能耗基准模型为基石,以能耗修正系数为约束量的建筑物供热节能量评价模型.结合某高校历年的供热能耗数据,验证该模型的评价结果稳定可靠,为节能成效的科学评价奠定了理论基础,为供热行业的合同能源管理提供有力支撑.     

基于多种节能量模型的供热后评价研究

作为促进供热节能的有效手段,项目节能后评价受到广泛重视。其中评价指标体系的构建是核心,节能量的确定是关键。明确以"安全、工艺、能效"三大指标为主的节能评价体系,分析节能量模型存在的差异,提出基于能耗修正系数以及度日能耗的建筑物供热节能量评价模型。结合某高校实际供热数据,验证评价结果稳定可靠,为节能效果的科学评价奠定数据基础,为合同能源管理在供热领域的普及应用提供有力保障。     

多能互补的综合能源供热系统工程设计及优化

多能互补的综合能源供热系统能够利用各种能源的特点,提高能源利用效率及经济性.针对综合能源供热系统,从建筑物的逐时热负荷预测及建立通用的供热设备参数优化方法两个方面展开研究.依据室内热平衡方程、建筑物围护结构传热模型、供热末端传热模型,建立建筑物热负荷、室内温度及供热末端所需最低供水温度的联合计算模型.以每个时刻供热成本...     

浅析地源热泵系统

正近年来,地源热泵作为一种可持续发展的建筑节能新技术,因其节能环保、经济可行等诸多优点,已逐步受到重视与推广。1地源热泵的含义地源热泵是一种利用浅层地热资源来实现供热与制冷的高效节能空调系统,是以岩土体、地下水或地表水为低温热源,由水源热泵机组、地热能交换系统、建筑物内系统组成的供热空调系统。它根据可逆卡诺循环原理,冬季从地源(岩土体、地下水或地表水)中吸收热量,向建筑物供暖;夏季从室内吸收热量并转移释放到地源中,实现建筑物制冷。     

可再生能源中的“潜力股”——浅层地热能

<正>随着经济快速增长,能源形势日趋严峻,浅层地热能作为一种重要的新型能源,其开发利用成为实现可持续发展的重要途径。国内外实践证明,利用地源热泵技术开发浅层地热(温)能为建筑物供热、制冷是实现节能减排的有效途径。5月28日,中国新能源建筑产业联盟举办"浅层地能与新能源建筑研讨会",讨论利用浅层地能为建筑物无燃烧智慧供热新兴产业发展的现状、问     

供热分户计量在建筑节能中的重要性和可行性分析

中国的能源消费日趋紧张,节能工作迫在眉睫,供热系统分户热计量已经成为必然的趋势.本文对供热系统节能的必要性和可行性进行了分析,提出应大力实施供热分户计量以满足用户的自主温度需求,节省供热费用,提高城市供热质量,减少能源消耗量.     

燃气(油)锅炉房供热系统的节能方法

燃气(油)锅炉房供热系统的节能不仅能降低运行费,而且还是促进燃气供热发展的重要措施.节能方法有燃气(油)锅炉能效的提高,供热系统能效的提高和节能产品的应用等.     

燃气(油)锅炉房供热系统的节能方法(上)

燃气(油)锅炉房供热系统的节能不仅能降低运行费,而且还是促进燃气供热发展的重要措施.节能方法有燃气(油)锅炉能效的提高,供热系统能效的提高和节能产品的应用等.     

山西推广污水水源热泵供冷供热技术

不用煤、不用油、不用燃气、不排烟、不排渣、零污染,既可以为建筑物供冷供热,还可以供生活热水的“三联供”污水水源热泵供冷供热技术在山西应用成功。山西省发改委、国资委等部门向全社会发出倡议,在山西省大力推广这一节能减排技术。     

锅炉供暖系统的节能途径

锅炉供暖系统的节能途径山东工业大学金晶，冯明志近年来随着国民经济的飞速发展和人民生活水平的不断提高，供暖系统的应用日益广泛，也使得建筑物的供热能耗大量增加。因而对供暖系统设计和运行中的节能提出了更高的要求。要实现供暖系统的节能应从以下几方面考虑：一、...     

某节能住宅小区地下水源热泵系统应用的经济性及节能性分析

针对咸阳市某节能住宅小区供冷供热的需求,依据建筑节能规范指标要求,进行围护结构热工设计与计算。结合当地丰富的浅层地下水资源条件,确定了利用地下水源热泵系统对该住宅小区进行供冷供热方案。对系统经济性和节能性进行计算与分析,对比分析了建筑围护结构和空调系统对建筑节能的贡献率,指出了建筑节能集成效益的优势。     

分时供暖在高校类建筑中的节能率分析

针对高校类建筑的使用特点及其供暖所存在的问题,提出了分时供暖节能控制方案。以天津地区某大学办公楼为例,结合天津地区气候特点对采用分时供暖方案后节能率随室外温度的变化规律进行分析。通过分析表明,在室内控制温度与间歇周期不变的条件下,节能率随室外温度的升高不断增加。     

严寒地区住宅建筑热计量的节能潜力分析

本文以大庆市热计量试点项目中三栋建筑作为研究对象,测试了供热期间三栋试验建筑的耗热量,比较了传统建筑和安装温控阀建筑的节能潜力。安装温控阀的建筑单位采暖耗热量为21．8W／m^2,未安装温控阀的建筑采暖单位采暖耗热量为25．5W／m^2,节能潜力为13．3％;未安装温控阀的地板辐射采暖系统建筑单位采暖耗热量为31．2W／m^2,节能潜力达到32．8％。比较发现,只有安装温控阀的建筑单位采暖耗热量没有超过国家标准限值,其它两栋建筑单位采暖耗热量超标率分别为24．5％和41．8％。同时发现,地板辐射采暖系统建筑能源浪费严重,说明了实行供热计量的重要性和必要性。     

既有居住建筑供热计量改造技术分析与能效评估

对枣庄市某小区供热计量改造项目进行了技术分析与能效评估,为其他节能改造项目提供参考,有助于推动既有居住建筑节能改造的推广。     

Recapitulation on latent heat hybrid buildings

In the existent paper, the performance of thermal storage hybrid buildings exploiting the latent heat of phase change materials (PCMs) for thermal refrigeration and heating of the contemporary period has been investigated. The conventional buildings consume a large amount of electricity, primarily for the heating and cooling applications. Electricity generation primarily relies on coal-based thermal power plants. The emissions from these establishments pose a serious threat to the environment. Moreover, conventional heating/cooling units rely on exorbitant energy cost. The usage of any kind of thermal storage system is an efficacious way of stockpiling thermal energy and utilizing it when needed. This paper gives a comprehensive overview of the available thermal storage units incorporating PCMs. The various segments of the buildings, viz, ceiling, window, wall, and floor have been analyzed in details. The results are quite promising in terms of load reduction and overall energy saving. Indoor surface temperature reduction of up to 7^oC has been achieved. The energy saving of up to 40% can be realized by employing PCM. A comprehensive list of the PCMs is also tried to build up for end users according to their temperature requirement.     

山西农村住宅建筑节能现状调查

由于建筑特点、采暖形式等因素的影响,山西农村居住建筑有很大的节能空间.本文首先介绍山西农村居住建筑的节能现状,包括建筑概况、维护结构及采暖措施等方面,并就相关节能政策、维护结构的保温及新能源利用等方面提出相应的改良措施,指出对农村居住建筑进行节能改造,不仅有较大的经济意义、环境意义和社会意义,而且是我国可持续发展战略目标的一个重要组成部分.     

Energy efficient design of building: A review

Energy saving is a high-priority in developed countries. For this reason, energy-efficient measures are being increasingly implemented in all sectors. The residential sector is responsible for an important part of the energy consumption in the world. Most of this energy is used in heating, cooling, and artificial ventilation systems.With a view to developing energy-efficient structures, this article provides an overview of building design criteria that can reduce the energy demand for the heating and cooling of residential buildings. These criteria are based on the adoption of suitable parameters for building orientation, shape, envelope system, passive heating and cooling mechanisms, shading, and glazing. An analysis was made of previous studies that evaluated the influence of these parameters on the total energy demand and suggested the best design options. This study is useful for professionals who are responsible for decision-making during the design phase of energy-efficient residential buildings.     

Optimization of insulation thickness for external walls using different energy-sources

In countries that import most of their energy, like Turkey, energy saving and the effective usage of energy become much more important. Energy consumption for heating is too high in Turkey because buildings have almost no insulation. Also the high prices of heating energy in Turkey, emphasize the need for energy saving. Therefore, the optimum insulation-thickness of the external wall for the five different energy-sources (coal, natural gas, LPG, fuel oil and electricity) and two different insulation materials (expanded polystyrene, rock wool) are calculated for Denizli. The optimization is based on a life-cycle cost analysis. According to the results, the optimum has been obtained by using coal as the energy source and expanded polystyrene as the insulating material. When the optimum insulation-thickness is used the life cycle saving and payback period are 14.09 $/m² and 1.43 years, respectively.     

Simulation of energy saving in Iranian buildings using integrative modelling for insulation

According to one survey on energy consumption in Iran, commercial and building sector consume more energy than any other economic sectors. For example, about 38% of total energy that consumed in year 2001 has been used for space heating. Insulation in external walls of buildings has an important role to reduce the environmental effects on indoor space condition. Therefore, always using insulation is an alternative to avoid from the energy loss. In this paper, the effects of the using of a proper insulation on the energy saving in Iranian buildings are studied. For this purpose, an integrative modelling is used for simulation of the energy consumption in buildings. It is shown that energy consumption per square meter of buildings can be reduced up to 35.2% when insulation is used for external walls.