共查询到19条相似文献,搜索用时 721 毫秒
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近日,山东省节能考核奖励电视会议在济南召开,山东省委副书记、省长姜大明作重要讲话。会议隆重表彰了2011年度节能突出贡献单位和重大节能成果。山东亚特尔集团自主研发的“外融冰蓄冷独立除湿地源水一体化空调系统”, 相似文献
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近日,山东亚特尔集团自主研发的“外融冰蓄冷独立除湿地源水一体化空调系统”,被评为2011年山东省优秀节能成果奖。此项目在常规地源热泵系统的基础上,通过空气处理过程中的温湿度独立控制,有效降低了热工系统的不可逆损失,较常规空调可节省50%-0%的运行、维护费用。该项目为加快山东省推进节能技术、装备的产业化进程,深入开展节能技术改造起到了积极的推动作用。 相似文献
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从室内空调设计参数、动力系统、空调系统、辐射地板系统、通风系统、节能源设计等工程各系统,详实介绍了教育培训中心的暖通空调系统设计,对同类工程项目的暖通空调设计,具有实用借鉴价值。 相似文献
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地下水空调技术与应用 总被引:2,自引:0,他引:2
本文以季节性的舒适性空调为对象,较详细地介绍了地下水人调供冷的基本原理,特点、供冷负荷的计算方法,地下水风机盘管空调系统的布置、测试与维护管理,实用效果以及地下水空调技术的应用前景。 相似文献
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姿态控制系统是功能多、构成复杂、可靠性要求高的关键分系统之一。传统的三自由度模型有较大局限性,不能全面反映飞行的实际情况。该文首先建立了姿态控制系统六自由度全量数学模型,包括控制方程和箭体运动两大部分。在此基础上,利用Matlab/Simulink仿真环境对姿态控制系统六自由仿真进行了研究。并通过对姿态运动简化分析和系统稳定性研究,设计了相应的数字校正网络和变增益系数,从而建立了姿态控制系统的全数值仿真模型。仿真实验表明,系统稳定,并且仿真结果具有较好的精度。 相似文献
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成矿过程的定量化研究是个崭新而艰难的问题。本在时空四维坐标中分别建立了含矿溶液在介质中运移的流速场、成矿温度场和矿液扩散迁移过程等重要控矿因素的数学模型。进一步结合化学动力学原理导出了沉淀的数学模型。作为应用,本利用该模型计算了云南金顶铅锌矿区各点铅锌含量值和资源总量,圈定了找矿靶区,取得了满意的效果。 相似文献
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由于全热交换器可以同时回收空调回风空气所含有显热和潜热,作为热回收设备被广泛应用于楼宇空调新风换气系统。本文结合实例对转轮式全热交换器的节能特性及经济效益进行了分析。并在剖析了现行全热交换器发生交叉污染之机理的基础上,对转轮式全热交换器无交叉污染化进行了实验研究。 相似文献
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近年来水源热泵空调系统的应用越来越广泛,回灌技术是水源热泵系统的发展的瓶颈,研究分析水源热泵回灌能力、回灌状况等,解决回灌过程中普遍出现的回灌难问题,能够为水源热泵系统开发利用提供有力的技术支撑。通过对地质科技园办公楼水源热泵中央空调实地调研,了解目前回灌系统的回灌量变化状况。结合空调系统以往运行中的经验,研究分析回灌系统回灌效果较差的原因是气堵原因。为方便实时掌握空调运行系统的运行情况,设计安装了水源热泵空调工程长期运行监测系统。围绕解决回灌系统出现的气堵问题,研发安装了新型回灌井头系统,提升系统回灌能力。 相似文献
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浅层地温能作为一种可再生环保能源越来越受到广泛重视,现在主要推广在较大规模的建设示范项目中。本文结合成都某办公楼空调方案,对风冷热泵与水源热泵系统优缺点及经济效益进行对比,得出水源热泵系统在小规模建设项目中同样具有可观的经济与社会效益。 相似文献
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本文介绍民航华北局山西办公楼地源热泵空调系统设计,重点介绍:1.室内分散式热泵系统(水环热泵)及室外地埋管换热系统的设计思路;2.太原地区粉质粘土地质结构冬夏季土壤换热量;3.运行情况。 相似文献
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Naichao Feng Shiqing Cheng Haiyang Yu Wenyang Shi Xin Liu Qicheng Liu 《Arabian Journal of Geosciences》2018,11(17):519
High-pressure air injection (HPAI) is a significant enhanced oil recovery (EOR) technology of light oils especially in deep, thin, low-permeability reservoirs. The flow and heat transfer behaviors of compressed air in wellbore is essential to maximize performance of air in EOR. Due to strong compressibility of air and high injection pressure, wellbore temperature and pressure are greatly affected by friction and gas compression. However, the available models of wellbore flow and heat transfer are only accurate for thermal fluid, such as saturated steam and superheated steam, injected at relatively low pressure and high temperature. In this paper, a novel model is proposed to characterize wellbore pressure and temperature distribution for HPAI wells with consideration of dynamic behaviors of injected air. Flow and heat transfer in depth direction are coupled with air properties by iterative technique, and heat transfer in radial direction is treated as steady state in wellbore and transient state in formation. The mathematical model is solved by employing finite difference method and it is validated by field data. Then, integrated analyses of flowing pressure, heat transfer mechanism, and interaction between pressure and temperature are conducted. Results indicate that (1) as well depth increases, temperature difference between formation and air tends to become constant, and the radial heat transfer tends to reach an equilibrium state. The higher the flow rate is, the deeper the equilibrium depth is. (2) Air temperature is dominated by heat transmission from formation at low flow rates and dominated by frictional heat and gas compression effect at high flow rates. Fictional heat begins to affect air temperature at an injection rate beyond the critical value, while gas compression effect can increase air temperature in the whole calculated injection rate range. (3) Interaction between wellbore temperature and pressure is mainly achieved by altering air density. The effect of injection pressure on air temperature can be negligible, while the influence of injection temperature shows strong dependency on injection rate. 相似文献
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E. Firouzfar M. Soltanieh S. H. Noie M. H. Saidi 《International Journal of Environmental Science and Technology》2012,9(4):587-594
The present study attempts to use the methanol?Csilver nanofluid filled heat pipe heat exchanger and compares the effectiveness as well as the energy saving with pure methanol. A heat pipe heat exchanger has been tested in a test rig under steady-state conditions. The lengths of both the evaporator and the condenser sections of the heat exchanger were 700?mm, and its central adiabatic section had a length of 160?mm. The heat exchanger had 36 plate finned copper thermosyphons arranged in three rows. The inlet air temperature across the evaporator section was varied in the range of 33?C43?°C while the inlet air temperature to the condenser section was nearly constant to be 13?°C. First, pure methanol was used as the working fluid with a fill ratio of 50?% of the evaporator section length, and then dilute dispersion of silver nanoparticles in methanol was employed as the working fluid. The nanofluid used in the present study is 20?nm diameter silver nanoparticles. The experiments were performed to compare the heat pipe heat exchanger effectiveness and energy saving, using nanofluid and pure methanol. The inlet air relative humidity across the evaporator section was varied between 35 and 80?%. The sensible effectiveness of the heat pipe heat exchanger obtained from experiments varied about 5?C22?% for pure methanol and 9?C32?% for methanol?Csilver nanofluid. Based on these experimental results, using methanol?Csilver nanofluid leads to energy saving around 8.8?C31.5?% for cooling and 18?C100?% for reheating the supply air stream in an air conditioning system. 相似文献
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根据热交换原理,提出了井内温度规程的数学模型,按照这个模型可以计算出井内任何时间、任何深度的温度。以冷却空气作为冲洗介质为例,给出了冷却空气洗井钻进时井内温度的简化计算公式和代表性关系曲线,按照这些计算公式和关系曲线可以计算出和看出空气洗井时井内任何时间、任何深度的温度。根据计算和研究的结果,指出了为了保证在冻土中进行正常钻井,从外环状空间内返回的冲洗介质的温度不宜高于0℃,并提出了相应的建议。 相似文献