【2018年必威体育精装版整理】办公楼空调系统水泵选择与节能分析论文.docxVIP

大连理工大学流体输配管网课程论文办公楼空调系统水泵选择与节能分析THE CHOICES OF WATER PUMP AND ENERGY-SAVING ANALYSIS OF THE OFFICE BUILDING AIR-CONDITIONING SYSTEM学院（系）：建设工程学部专业: 建筑环境与能源应用工程学生姓名：潘强广马华培万昌正郭智学号： 201256008 201256043201256025 201256020指导教师：端木琳李祥立绳现杰完成日期：2014.12.6大连理工大学Dalian University of Technology摘 要本文主要研究办公楼空调系统水泵的选择与节能分析，通过已知办公楼冷负荷流量需求及系统阻力损失，选择合适的水泵。在合理扬程和流量的情况下,计算不同台数水泵并联的能耗情况。并简单分析不同负荷变化条件下，并联水泵在系统运行中的工作情况，最终确定出节能方案。通过计算单台泵、双台泵及三台泵在全年供冷运行中耗电量，然后对多台泵并联情况在较低负荷需求下进行控制，以实现节能最优化。关键词：水泵并联；管网特性曲线；水泵特性曲线；节能分析THE CHOICES OF WATER PUMP AND ENERGY-SAVING ANALYSIS OF THE OFFICE BUILDING AIR-CONDITIONING SYSTEMAbstractThis report focuses on building selection and analysis of energy saving of air conditioning system pumps, from a known flow requirements and system of office building cooling load resistance loss, choosing the right pump. In case of reasonable head and flow, calculating the energy consumption of different number of pumps connected in parallel. Performing a simple analysis under different load conditions, parallel performance of the pumps in operation of the system and eventually establish energy-saving program. By calculating a single pump, double-pump and three pumps in cooling operation power consumption throughout the year, and multiple parallel pumps at low load demand under control to achieve energy-saving optimization.Key Words：parallel pump; pipe network curve; pump characteristic curve; energy-saving analysis1.工程背景近年来，随着集中供热、集中空调在工业和民用建筑中的普及，其能耗在社会总能耗中所占的比例也在不断上升。而水泵的耗电量在空调系统耗电量中又占有相当的比重，因此水泵的合理选择和匹配是降低其能耗、保证系统正常运行的关键[1]。本文将针对大连理工大学某办公楼空调系统进行水泵的设计，已知该办公楼空调系统供冷量为769kW，冷冻水循环流量164m3/h,系统阻力损失20mH2O，水泵功率36kW。负荷变化范围90%以上13%，80-90%13%，70-80%32%，60-70%15%，50-60%16%，50%以下11%，总供冷天数122天。2.水泵的选择空调系统中的水泵总是与特定的管路相连，其工作状态点有水泵的性能曲线与管路的特性曲线共同决定[2]。根据已知冷冻水循环流量Q=164m3/h,系统阻力损失H=20mH2O ，由空调系统冷冻水循环为闭式循环，即水泵扬程选择大于系统的阻力损失即可满足系统正常运行要求。2.1流量的校核根据制冷量W=769kW，按5℃温差进行校核，由qv=W/(5×1.163)=132.24m3/hQ=164 m3/hqv 故循环泵流量满足要求2.2水泵及管网参数的确定选择水泵的参数应该按照工况要求的最大流量和最大扬程再乘以附加安全系数的数值作为依据。附加值取10%，即Q=1.1×164m3/h=