共查询到20条相似文献,搜索用时 78 毫秒
1.
介绍了青岛某别墅的空调和热水供应系统的方案设计.设计方案把地源热泵技术用于住宅的空气调节、卫生热水供应和游泳池补水供水,还采用了辐射供暖与辐射供冷等节能新技术.文章详细介绍了系统流程、特点、工作原理和设计参数的选取等. 相似文献
2.
3.
4.
被动式供冷与辐射制冷技术 总被引:1,自引:0,他引:1
介绍了被动式供冷的原理以及被动式供冷系统的分类,特别介绍了其中新兴且日益发展的辐射供冷技术的原理及应用,指出被动式供冷是节能环保可持续发展的制冷技术,应大力开发使用。 相似文献
5.
6.
介绍地源热泵在黄土高原地区的应用情况,在土壤换热器设计、循环介质选用等许多方面均有所创新。投运后,各种测试数据均达到预期指标,为以后在黄土高原地区推广该技术提供了参考。 相似文献
7.
地源热泵是一种利用土壤所储藏的太阳能资源作为冷热源进行能量转换的供暖制冷空调系统,通过输入少量的高品位能源(如电力、机械功、燃气和液体燃料),实现热量从低温热源向高温热源的转移.以上海某小型别墅为对象,设计了一套家用地源热泵空调系统.首先计算了夏季冷负荷和冬季热负荷,然后根据冷、热负荷选择一套水源热泵机组(MWH080CR型机组)和相应的风机盘管,进行了室内水管环路系统、土壤热交换器和地板采暖的设计选型,最后对系统的能效比进行了计算.结果表明,该空调系统具有节能环保、稳定可靠、舒适耐用等优点. 相似文献
8.
地源热泵在空调中应用的探讨 总被引:3,自引:0,他引:3
本文介绍了地源热泵的特点、工作原理和分类,分析了地源热泵的关键技术,并与相关的热泵技术进行了性能比较,对地源热泵进行了技术经济分析,最后还介绍了地源热泵技术在制冷空调中的广阔应用前景。 相似文献
9.
空调用电已经制约了我国国民经济的发展,严重影响了人们的生产和生活。文章从节能角度出发,阐述了地源热泵空调器的工作原理和技术特色,并重点说明了江苏省开展和应用地源热泵空调器技术研究的重要性和紧迫性。 相似文献
10.
《节能》2019,(12):92-96
利用CFD对考虑地板传热的三维建筑模型进行模拟,得出换气次数,供回水平均温度和建筑外墙的内表面温度对地板表面温度,辐射换热量和总换热量的影响,以此得出这些因素对地板辐射供冷+置换通风的复合式系统的供冷性能的影响。结果表明:换气次数每降低1h~(-1),地板表面温度升高约0.26℃,辐射换热量升高约1.07 W/m2;供回水平均温度每升高1℃,地板表面温度升高约0.65℃,辐射换热量降低约2.01 W/m~2,外墙的内表面温度每升高1℃,地板表面温度升高约0.25℃,辐射换热量升高约2.08 W/m~2;由于对流换热系数约为0.5~1.0 W/(m~2·K),地板表面的总换热量中对流换热量占比很小,这主要是置换送风时,地板附近空气的垂直温差较小导致的,所以在不考虑地板的供冷能力变化的条件下,其他形式的送风系统可能是更合适的选择。 相似文献
11.
12.
13.
土壤源热泵是利用土壤作为吸热和排热源的一种高效、节能、环保的热泵技术,近年来得到了快速的发展。本文介绍了一种简化的土壤与埋地换热器的传热数学模型,并利用Foxpro编制了简便、快速的计算程序。 相似文献
14.
15.
16.
Thermodynamic and thermoeconomic optimization of a cooling tower-assisted ground source heat pump (GSHP) in a multi-objective optimization process is performed. A thermodynamic model based on energy and exergy analyses is presented, and an economic model of the hybrid GSHP (HGSHP) system is developed according to the total revenue requirement (TRR) method. The proposed hybrid cooling tower-assisted GSHP system, including 12 decision variables, is considered for optimization. Three optimization scenarios, including thermodynamic single objective, thermoeconomic single objective, and multi-objective optimizations, are performed. In multi-objective optimization, both thermodynamic and thermoeconomic objectives are simultaneously considered. An optimization process is performed using the genetic algorithm (GA). In the case of multi-objective optimization, an example of a decision-making process for selection of the final solution from the Pareto optimal frontier is presented. The results obtained using the various optimization approaches are compared and discussed. Further, the sensitivity of optimized systems to the interest rate, the annual number of operating hours in cooling mode, the electricity price, and the water price are studied in detail. It is shown that the thermodynamic optimization is focused on provision for the limited source of energy, whereas the thermoeconomic optimization only focuses on monetary resources. In contrast, the multi-objective optimization considers both energy and monetary. Further, it is found that thermodynamic optimization is economical when the operating time in cooling mode is long and/or the electricity price is high, and water prices variations have no marked impact on the total product cost. 相似文献
17.
Application of a ground source heat pump system with PCM‐embedded radiant wall heating for buildings
This paper deals with the utilization of a renewable energy‐based integrated system with the latent heat storage option for building thermal management systems. Both energy and exergy‐based assessments of the current combined system are conducted. For this purpose, phase change material (PCM)‐embedded radiant wall heating system using solar heating and ground source heat pump (GSHP) is studied thermodynamically. Heat is essentially stored within the PCMs as used in the panels to increase the effectiveness. The stored heat is released when the solar energy is not available. In the thermal energy storage analyses, four different PCMs are considered. The present results show that the overall first ‐ law (energy) and second ‐ law (exergy) efficiencies of the PCM‐free radiant heating system are much lower than the case with the PCM‐embedded radiant heating system. Therefore, it is confirmed that the energy efficiency increases from 62% to 87% while the exergy efficiency rises from 14% to 56% with the option where SP26E PCM is employed accordingly. 相似文献
18.
19.
20.
结合对北方地区某公建地源热泵系统的工程设计,介绍岩土热物性测试的原理及测试方法;根据建筑逐时冷热负荷的动态模拟计算结果进行地下换热器的冷热平衡模拟与分析,并根据模拟结果对空调方案进行优化;详细分析钻孔间距、钻孔管径、钻孔长度及钻孔深度设计计算的原理。为今后地源热泵技术的应用提供指导和优化建议。 相似文献