空气源热泵辅助太阳能集中生活热水系统分析

双碳目标下,二氧化碳排放量成为评价系统环保性的一个重要指标。文章分析了集中生活热水系统中太阳能与空气源热泵常用组合形式的优缺点及控制逻辑,得出空气源热泵辅助太阳能制备热媒的系统适用于改造项目,新建项目建议优先选用空气源热泵辅助太阳能制备热水。结果表明,太阳能和空气源热泵二者供热比例相当,各占总供热量的46%,电加热占总供热量的8%;与传统燃气锅炉热水系统相比,空气源热泵辅助太阳能制备热水系统减碳19.1%,环保效益明显。     

太阳能辅助燃气锅炉制取蒸汽在工程中的应用

提出太阳能辅助燃气锅炉制取生产蒸汽的新模式,结合实际工程案例着重讲述了系统组成及设备的计算选型,同时通过耗热量计算得出此种模式比直接采用燃气锅炉节省燃气消耗10%左右,有效减少常规化石能源消耗,为太阳能辅助燃气锅炉联合热源系统的推广应用提供了一种新方法。     

促进建筑利用太阳能热水系统——《民用建筑太阳能热水系统评价标准》（GB/T50604-2010）介绍

太阳能作为可再生能源是取之不尽、用之不竭的清洁能源。太阳能热水系统由于安全和技术成熟最具发展潜力。推广利用太阳能热水系统,对于节约常规能源消耗、减少温室气体排放、改善人民生活条件,都具有极为重要的意义。《民用建筑太阳能热水系统应用技术规范》GB50364-2005实施后,建筑利用太阳能热水系统发展很快。如何从技术上提高太阳能热水系统的性能、如何普及和提高太阳能热水系统与建筑一体化的应用水平,尤其是在各省市相继出台强制安装政策和各级政府部门制定相应的激励政策后,     

某住宅小区幼儿园太阳能热水系统节能分析

对某住宅小区幼儿园的太阳能热水供应方案进行了分析,并将该热水供应系统与电热水系统和燃气热水系统作了对比,获得了三种热水系统的节能量和投资效益指标,促进了该地区太阳能热水系统的推广应用。     

水源热泵在燃气供热锅炉烟气余热回收中的应用

针对现有燃气锅炉用烟气余热回收装置受供热系统回水温度较高限制、难以回收烟气余热中大量潜热的问题,提出了一种应用水源热泵的燃气锅炉烟气余热深度回收技术。介绍了该技术的方法和原理,并对某锅炉房改造工程运行数据进行了分析。结果表明,采用该技术可将排烟温度降至30℃以下,降低供暖燃气消耗量10%,极大地减少了燃气锅炉排烟中水蒸气含量,有助于缓解供暖季雾霾的产生。     

新疆地区太阳能热水系统辅助热源选型及效益研究

新疆地区太阳能资源丰富,具备太阳能热水系统的广泛应用推广的自然条件.但由于该地区冬夏两季气候分明,冬季采暖日长,阴雪大雾天气多的气候特性,必须将当地太阳能热水系统合理结合辅助热源使用以确保在极端天气下系统正常的供热效果.常见的辅助热源系统形式包含了电加热、燃气加热以及热泵系统等.因此,基于我国目前较为成熟的太阳能热水技...     

某高校图书馆太阳能辅助地源热泵系统设计

基于贵阳市某高校图书馆的太阳能辅助地源热泵系统设计,首先介绍桩基螺旋盘管与水平地埋管相结合的地埋管换热器;然后利用De ST软件对该图书馆进行全年负荷计算,以此制定地源热泵-太阳能系统联合运行的热平衡方案,并介绍了热泵机组和太阳能集热器设备选型情况;最后,分析了地源热泵-太阳能系统相对于传统电制冷机组-燃气锅炉系统的节能效益和环保效益。     

某住宅小区太阳能热水系统利用方案分析

结合某住宅小区使用太阳能热水系统的情况,计算了太阳能热水的供热量,比较分析了太阳能热水供应系统与电热水器、燃气热水器等热水供应方式的节能量及经济性指标,结果表明:低层住宅建筑采用太阳能热水器具有较好的节能效益和经济效益。     

太阳能集中供热系统在住宅小区中的应用分析

文本对太阳能热水系统的类型进行了分析,进一步对住宅小区的太阳能的应用进行分析,分析的主要内容有太阳能集中提供热水的选择原则,太阳能的集中热水供应因素等,最终得出了应用太阳能实行集中热水系统供水,同分户燃气热水供应和分户电热水供应对比,具有明显优势。     

平谷新民居:太阳能热水多能互补采暖系统

在北京平谷新农村改造项目中．昆明新元阳光科技有限公司承担并实施了将军关村的单元户冬季采暖示范工程。项目从减排温室气体和能源、经济、社会可持续发展的高度，要求尽可能地利用太阳能等可再生能源解决新民居的生活热水和冬季采暖问题，并要求能源设备与建筑结合，实现与环境协调。经专家组论证．认为由太阳能／辅助电热水系统空气集热系统．薪保障系统及低温热水地板辐射采暖系统构成的供热系统在技术上是可行的，同时，该系统可以根据平谷区新农村不同的经济能力和场地特点，选择不同的组合系统和能量控制系统，具有较高的可靠性。     

一种主动式太阳能供暖系统的经济性分析

太阳能是非常丰富的可再生能源,随着环境保护的日益加强,太阳能的应用越来越受到重视,尤其在建筑供暖方面的应用,可以减少煤、天然气等一次能源的消耗,减少温室气体的排放.通过搭建实验台,对试点工程项目进行相关的设计、施工、检测和技术经济分析,着重考查主动式太阳能供暖的节能效果、舒适性和经济性.计算实际的运行费用,并与其他采暖方式进行比较分析,最后总结出主动式太阳能供暖系统的经济性特点.     

太阳能热泵供热系统的应用及经济性分析

以0.7 MW的供热功率为评价标准,分别对太阳能热泵、燃油锅炉、燃气锅炉和电加热锅炉四种供热系统进行了初期投资、运行费用、燃料价格等因素的综合技术经济分析与评价,评价结果表明：太阳能热泵供热系统的综合效果最好,适合在青岛推广应用。     

太阳能与壁挂锅炉有效配合的实践研究

针对如何有效地将太阳能和壁挂锅炉进行配合这一问题,从单纯生活热水需求和采暖热水需求两方面对太阳能与壁挂锅炉的组合形式进行了探讨,提出了能够满足人们不同需求的加热模式,从而降低壁挂锅炉运行成本,充分提高太阳能利用率。     

Occupants have little influence on the overall energy consumption in district heated apartment buildings

The purpose of this research is twofold: first, to evaluate how occupant behavior in a neutral environment influences the overall greenhouse gas emissions and energy consumption of multi-family apartment buildings, and second: to establish which activities associated with housing companies produce the most greenhouse gas emissions. The research comprised of a multiple cases of housing companies dating from the late 1960s and located in the Finnish capital Helsinki. The studied housing companies represent the least energy efficient third of the Finnish residential building stock, approaching obligatory large scale refurbishments. The analysis is conducted in two phases with a so called hybrid life-cycle assessment (LCA) technique. Using the technique, both economic and metric consumption data are analyzed to estimate the greenhouse gas emissions generated by activities associated with housing. In line with previous research, the study identifies heating energy as the single most significant contributor to greenhouse gas emissions. The results also show that the carbon load associated with housing activities makes up one third of an individual resident's overall carbon footprint. Contrary to often stated belief, the study indicates that occupant behavior has only limited effect on the energy consumption and, consequently, carbon emissions derived from housing, particularly when multi-family housing connected to district heating is concerned. However, apartment size seems to have a two-way impact, the smallest and the largest being the least energy efficient.     

Hybrid utilization of renewable energy and fuel cells for residential energy systems

This paper describes field experiments and numerical simulations on hybrid utilization of renewable energy and fuel cells for a residential energy system. It presents results of empirical testing and evaluation of hybrid utilization involving solar energy. First, field experiments were conducted on an electric power and domestic hot water supply system that uses both solar energy and fuel cells. The system achieved a large amount of reduction in primary energy consumption compared with conventional systems. Secondly, a simulation was performed on the optimum scale and effect of introduction of the system. The simulation results proposed the optimum capacities of the solar energy utilization and fuel cells to minimize primary energy consumption of the system.     

基于全生命周期分析的北方农村住宅被动式集热墙体的环境影响分析

该文采用全生命周期的分析方法,比较在采用相同保温措施的情况下,与普通保温墙体相比,三种形式的被动集热墙在全寿命周期的范围内的采暖能源消耗、温室气体及固体废弃物排放情况.通过比较分析可以看出,直接受益式和附加阳光间式集热墙体在能源消耗、温室气体和固体废弃物的排放量上均小于对比房,在环境影响上具有明显的优越性;集热蓄热墙的...     

A study on environmental impact of nanofluid-based concentrating solar water heating system

The rising cost of fossil fuels and the growing concern for a clean environment have paved the way for adoption of renewable and sustainable sources of energy. Domestic water heating can result from solar energy, a clean and renewable alternative, which can at the same time help to reduce greenhouse gas emissions. This paper examines the potential of the nanofluid-based concentrating solar water heating system (NCSWHS) as an alternative to systems based on fossil fuels. The paper reports a quantitative assessment to assess the potential environmental benefits which could be obtained from NCSWHS if substituted for those using fossil fuels. The analysis reveals that considerable emission reductions (about 2.2 x 10³ kg of CO₂/household/ year) and fuel savings can be achieved if the NCSWHS are adopted.     

太阳能-燃气耦合利用建筑供热数据采集与监控系统开发

该系统的设计以太阳能优先,燃气壁挂炉为主,最大化利用太阳能资源,在满足地板采暖制备的情况下,富余的热量可以补充到生活用水当中去。在控制系统方面,则是采用的SIEMENS系列的PLC-200作为下位机,利用现场安装的温度、压力、流量等传感器采集相关的温度、流量等基础热工参数;Win CC则作为系统的上位机,监控整个系统的运行。数据库SQL实现了采集数据的归档管理,做到了实时跟踪,监控报警。整个实验平台搭建完毕后,对系统进行了相关的调试,结果表明监控系统具有很好的稳定性和可靠性。     

蓄热型空气式太阳能集热-空气源热泵复合供暖系统在寒冷地区的应用研究

设计了一种蓄热型空气式太阳能集热-空气源热泵复合供暖系统.该系统具有太阳能供热、太阳能辅助热泵供热和热泵供热3种运行模式,可根据环境工况及供暖负荷的变化自动切换运行模式,保证室内供暖的稳定性.在通辽市的实验研究结果表明:在整个供暖季内,该系统可持续提供42.6 ℃的热水,维持室内温度在21.3?24.1 ℃之间;平均C...     

Sensitivity analysis of municipal drinking water distribution system energy use to system properties

Municipal Drinking Water Distribution Systems (MDWDSs) consume a significant quantity of energy to transport water, thereby exacerbating greenhouse gas emissions and global climate change. The current study is a sensitivity analysis that uses a network solver to quantify energy savings due to the alteration of three system properties—system-wide water demand, storage tank parameters (maximum water level, diameter, elevation), and pumping stations (horsepower, number of boosters, and their locations) of seven diverse MDWDSs. It was found that a 50% reduction in water demand, main pump horsepower, and booster horsepower resulted in an average energy savings of 47, 41, and 9.5% respectively, for the seven systems analyzed. Other properties examined showed insignificant savings. Even though an individual system analysis is more conclusive, this sensitivity analysis can guide optimization studies to focus on the most sensitive properties.