【作者】 于立强；

【导师】 南晓红； 刁乃仁；

【作者基本信息】 西安建筑科技大学 ， 供热、供燃气、通风与空调工程， 2004， 硕士

【摘要】 本文研究了模块化风冷热泵机组的设计、性能分析、安装维护注意事项。空调设备的广泛应用消耗了大部分电能，几个发达国家的空调所耗电能已占用电总量的30％左右。所以进一步提高空调器的效率、节能节材降耗十分重要。传统的经验设计方法效率低、投入高、开发周期长，远远不能适应现代企业的发展要求。研究空气源热泵系统机组尤其是小型中央空调设计新方法，具有重要现实意义与重大经济价值。 在热泵型机组的空调系统的选型中应考虑空调负荷、机组类型数量、安装位置、附属设备、末端设备等多项因素，特别注意噪音和振动对周围环境的影响。空调系统为了节能应该考虑选用高能效比的热泵机组，根据机组部分负荷时的特点和效率确定合理的台数，水泵选取数量与热泵机组相同。末端设备的选择尽量选取小风量大焓差的设备。并且注意热泵设备的运行换热环境和恰当的运行措施。 本论文中热泵机组设计制冷制热量分别选取为35kW和38kW，经过计算，空气流量为5.053m~3／s，传热面积154.56m~2，空冷冷凝器长3.09m，高0.8m深0.075m，3排管，两台轴流风机风量152m~3／min，静压47Pa，全压49.3Pa，选取阿伐拉伐板式换热器CB52-58HX，Bristol压缩机H25G144DB，水泵功率0.75kW，流量4m~3／h，扬程20m，并选择电磁阀、单向阀、压力控制器、干燥过滤器、视镜、流量计、分液器、轴向压力表等设备部件。 电脑系统应设置自动温度控制、自动防冻控制、自动除霜控制，热过载、缺相、压缩机高低压保护，故障监测、显示和保护等相应的控制和保护措施。 本文还进行了热泵机组变工况特性分析和计算。机组在实际工作时由于环境温度不同和空调末端装置设计的出水温度不同，机组的制冷量是变化的。制冷量是随冷水出水温度的增加而增加，并随环境进风温度的增加而减少，机组的功耗是随冷水的出水温度的增加而增加，并随环境温度的增加而增加。制热量随热水出水温度的增加而减少，随环境温度的降低而减少。输入功率是随着热水的出水温度增加而增加的，随环境温度的降低而减少。 本文根据实际安装运行过程中的经验，提出了安装注意的问题和常见故障的分析与解决方法。更多还原

【Abstract】 This article studies the design, performance analysis, installation and maintenance for the air-cooled heat pump unitary air conditioner.Air conditioning equipment consumes 30% of the total electricity consumption in a few developed countries. It is important to improve the efficiency of the air conditioning equipment, reduce the usage of material and low down the energy consumption. The traditional designing method is obsolete and not suitable for the present requirement.Air conditioning Load, unit numbers of the chiller, location of the equipment, accessory equipment, and terminal equipment should be considered when choosing the heat pump system, noise and vibration to the surroundings are important factors. To save energy, choose high efficiency chillers, and decide the unit number basing on the part-load condition. The number of water pumps should be synchronized with the chillers. Terminal equipment should have small entropy with large air volume. The good heat exchange environment and the suitable operation method can save energy greatly. For the Heat Pump Equipment Design with choosing Cooling Capacity: 35kW, HeatingCapacity: 38kW, and get Air Volume: 5.053m3 Is, heat exchange area: 154.56m ,dimension for the air cooled condenser, length: 3.09m. height: 0.8m , width: 0.075m,3rows. 2 air fan 152 m3 /min.Statistic Pressure 47Pa, Total Pressure 49.3Pa, SelectAfaLafa Flat Heat Exchanger CB52-58HX, Bristol Reciprocal Compressor H25G144DB, Water Pump 0.75kW, Volume4 m /h, Raising Head 20m, and choose the electric-magnetic valve, single-direction valve, pressure controller, dehumidificationfilter, barometer, etc. to put up the chiller.Automatic control system includes the auto-temperature control, auto anti-freezing control, auto-defrost control, anti-overload protection, voltage-over range protection, diagnose, display systems.The cooling capacity varies with the changes of the environment temperature, flowing out temperature of the cooling water. Cooling capacity increases with the raising of the flowing out temperature, and decreases with the raising up of the air temperature. The energy consumption increases with the increasing of the temperature of the water flowing out of the evaporator, and the environment air temperature. At the heating mode, the heating capacity of the chiller decreases with the heated water temperature increasing or environmental temperature. The consumed power increases with the increasing of heated water temperature, and decreases with the decreasing of the environmental temperature.The article discusses problems for the maintenance and installation, and the ways to solve the common issues.更多还原