共查询到20条相似文献,搜索用时 140 毫秒
1.
郭德政 《能源技术(上海)》2010,(1)
介绍了西安工程技术学院新校区已经建成的一期建设工程的地热源供暖系统的设计方案和流程及其运行情况。对新校区今后还将建设的6万m~2建筑供暖的设计方案进行了探讨,方案准备采用在原有的地热井基础上加新地热井和在原有的地热井基础上增加水源热泵的两种地热源供暖,在与燃用天然气热水锅炉和集中供热方案进行经济性比较后发现,增加新地热井方案的经济性最好,结合水源热泵方案经济性也较好。最后进一步提出了两种地热源供暖系统方案的具体设想。 相似文献
2.
地热热泵调峰供暖系统的热力及经济分析 总被引:13,自引:1,他引:13
着重分析了地热热泵调峰供暖系统的热力性能和经济性。对两种采暖终端暖气片和风机盘管,分析计算了地热热泵调峰供暖系统的供暖参数和热泵性能参考。对我国目前经济条件下地热热泵调峰供暖的经济性进行了探讨,并与常规地热锅炉调峰供暖和传统锅炉供暖进行了比较。 相似文献
3.
地热供暖节能潜力与环境效益动态分析 总被引:2,自引:2,他引:0
在地热供暖系统中,正确计算或合理选取供暖指标,不仅是整个设计工作的重要环节,也是有效利用已开发资源,达到节能,保护环境的一种重要手段。通过对大量动态数据的测试,分析与计算,总结了由于地热与燃煤锅炉在供暖方式上不同而对供暖效果的影响,提出了地热供暖进一步开发节能潜力的可能性。 相似文献
4.
双热源供暖是在一个供暖系统中有两种热源,一个是主热源,一个是辅助热源。设置两种热源方式的目的,一是充分利用热能,达到节能降耗的目的;二是提高供暖系统运行的可靠性。设置双热源系统中的主热源,在以节能降耗为目的时,其主热源通常情况下是不能满足供暖尖峰负荷的需要的,因此需设置辅助热源,以便在供暖负荷较高时段即尖峰时段同时运 相似文献
5.
近年来,由于建筑能耗、环境污染和供暖政策等诸多因素,采暖问题持续受到社会关注。60年前基于地理和经济条件,政府把我国分为南方及北方,为我国北方提供了集中供暖系统。然而,随着气候变化和经济发展,这种划分标准已不再具有说服力。因此,找到合理的解决南方供暖问题的方法,不仅可以提高居民的生活水平,而且为供暖相关企业提供了巨大的机遇。文中旨在分析南方供暖现状,继而对供暖系统的选择提出相关建议。 相似文献
6.
简要介绍了地板辐射供暖系统的原理,并与传统的供暖方式作对比,被认为是目前最理想的一种供暖方式,市场前景广阔。 相似文献
7.
前言地热供暖是采用地热水将热能传送给热需求处,目前根据水质情况分直接供暖和间接供暖。水质较好的地热水可直接进入供暖系统供暖。大部分地热水含有大量的矿物质及硫化物对管网有一定的腐 相似文献
8.
9.
首先介绍了适用于寒区供暖的水源热泵及调峰供暖系统,指出该供暖系统的运行机制影响着运行的经济性。在不改变末端原有散热器的前提下,分析了该供暖系统主要运行参变量之间的关系。以系统运行费用为目标函数,推导出了系统运行时的优化模型。以哈尔滨某一小区从原有传统供暖方式改造为水源热泵及调峰供暖为例,对其进行了优化分析,得出了最优的系统方案及其运行情况,说明水源热泵及调峰供暖具有明显环保和经济效益。 相似文献
10.
11.
12.
通过对某换热站新增区域的供热方式与原采暖用户进行系统分析,建议新增区采用间接连接和混水直接连接两种方案,并对两种方案给出详细的设计说明;通过对两种方案进行整体比较分析,综合得出混水直供换热方式运行经济,供热效果良好,尤其是区域供热新增区或新建区采暖用户的供热选择方式。 相似文献
13.
集中供热系统中影响用户供热质量的最大问题是热网的水力失调问题.无论是直供还是间供系统的热网,系统水力失调已成为当前普遍存在又难以解决的难题,直接影响供热质量,同时造成能源浪费. 相似文献
14.
15.
Thermal performance, economic and environmental life cycle analysis of thermosiphon solar water heaters 总被引:2,自引:0,他引:2
Soteris Kalogirou 《Solar Energy》2009,83(1):39-556
In this paper, the environmental benefits or renewable energy systems are initially presented followed by a study of the thermal performance, economics and environmental protection offered by thermosiphon solar water heating systems. The system investigated is of the domestic size, suitable to satisfy most of the hot water needs of a family of four persons. The results presented in this paper show that considerable percentage of the hot water needs of the family are covered with solar energy. This is expressed as the solar contribution and its annual value is 79%. Additionally, the system investigated give positive and very promising financial characteristics with payback time of 2.7 years and life cycle savings of 2240 € with electricity backup and payback time of 4.5 years and life cycle savings of 1056 € with diesel backup. From the results it can also be shown that by using solar energy considerable amounts of greenhouse polluting gasses are avoided. The saving, compared to a conventional system, is about 70% for electricity or diesel backup. With respect to life cycle assessment of the systems, the energy spent for the manufacture and installation of the solar systems is recouped in about 13 months, whereas the payback time with respect to emissions produced from the embodied energy required for the manufacture and installation of the systems varies from a few months to 3.2 years according to the fuel and the particular pollutant considered. It can therefore be concluded that thermosiphon solar water hearting systems offer significant protection to the environment and should be employed whenever possible in order to achieve a sustainable future. 相似文献
16.
顶棚低温辐射电热膜供暖应用越来越多,对这种供暖方式详细分析很有必要。从供暖室温和化学能利用率两方面详细讨论了使用顶棚低温辐射电热膜供暖节能效果,从安装费用、使用费用和维护费用三方面分析使用低温辐射电热膜供暖的经济性,然后对使用低温辐射电热膜供暖的环保作用、使用安全以及对人健康的影响进行了简单讨论。分析结果表明使用低温辐射电热膜供暖浪费能源,而且经济性较差,环保方面只是使污染区转移,有很小的火灾隐患,舒适性差,还是传统的管道集中供暖方式比较节能、经济和安全。 相似文献
17.
This paper is the first of two papers that describe the modeling, design, and performance assessment based on monitored data of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) in a prefabricated, two-storey detached, low energy solar house. This house, with a design goal of near net-zero annual energy consumption, was constructed in 2007 in Eastman, Québec, Canada - a cold climate area. Several novel solar technologies are integrated into the house and with passive solar design to reach this goal. An air-based open-loop BIPV/T system produces electricity and collects heat simultaneously. Building-integrated thermal mass is utilized both in passive and active forms. Distributed thermal mass in the direct gain area and relatively large south facing triple-glazed windows (about 9% of floor area) are employed to collect and store passive solar gains. An active thermal energy storage system (TES) stores part of the collected thermal energy from the BIPV/T system, thus reducing the energy consumption of the house ground source heat pump heating system. This paper focuses on the BIPV/T system and the integrated energy concept of the house. Monitored data indicate that the BIPV/T system has a typical efficiency of about 20% for thermal energy collection, and the annual space heating energy consumption of the house is about 5% of the national average. A thermal model of the BIPV/T system suitable for preliminary design and control of the airflow is developed and verified with monitored data. 相似文献
18.
叙述了在高层建筑的采暖设计中,中高层建筑与低层用户之间,采暖系统连接是设计人员需要仔细考虑的问题,指出,高低区直连采暖系统更为经济合理,提出,高低区直连系统加压泵扬程的计算公式. 相似文献
19.