污水源热泵机组性能的研究

利用热泵系统回收城市污水中的热能，既开发了一种清洁能源，同时又降低了城市废热的排放，保护了环境。通过对以水源热泵为中心设备的污水热能回收与利用实验装置冬季供暖工况的实验研究，考察了热泵机组在以污水（模拟）为热源时的工作性能，测得热泵机组性能系数为2．61。     

热泵蒸馏应用于橡胶助剂废水预处理的研究

橡胶助剂废水属于难处理的工业废水，尤其是CBS（N－环己基－2－苯并噻唑次磺酰胺，英文名N－cyclohexy1-2-benzoth-iazole sulfonamide，简称Accelerator CBS)生产废水的COD达40000mg/L，并且含有杂环类有害化合物，难降解，难生化。经过絮凝沉淀、化学氧化、电化学法、吸附法等实验方法，处理效果都不是十分理想。采用热泵蒸馏技术对橡胶促进剂CBS的废水进行预处理实验，可使CBS废水的COD从40000mg/L降至1600mg/L，结果表明，该技术设备简单，投资少，操作方便，运行成本低，并能达到较理想的预处理效果。     

铁路沿线供暖用低温空气源热泵热力性能对比研究

我国北方铁路沿线站段冬季采暖主要以燃煤锅炉为主,随着冬季雾霾现象日益严重,采用空气源热泵作为北方铁路沿线传统燃煤锅炉供暖的替代方式,对于减少能源消耗、改善大气环境具有重要意义。研究跨临界CO2热回收热泵和回热循环热泵系统2种低温空气源热泵系统,对其热力性能进行了实验和对比分析。结果表明,当环境温度不变时,随着供水温度由45℃升高至55℃,跨临界CO2热回收热泵制热量和COP均升高;随着供水温度由45℃升高至50℃,回热循环热泵制热量和COP均逐渐降低。当供水温度低于50℃时,回热循环热泵COP高于跨临界CO2热回收热泵,回热循环热泵系统的节能效果更为显著;当供水温度超过50℃时,跨临界CO2热回收热泵的性能更优。在低温环境条件下,跨临界CO2热回收热泵系统能够提供更高的供水温度,并有效提升空气源热泵的制热性能,结合我国北方铁路沿线站段的供暖需求和气候条件,提出相较于回热循环热泵系统,跨临界CO2热回收热泵系统的适用性和热力性能更为优越。     

Improving body posture while fueling with a newly designed pump nozzle

Background. Although petrol pumps are a very common and highly used simple technology, their design consideration for comfort and safety to prevent high-pressure load and musculoskeletal injuries to the body is a neglected area in many countries including Iran. Objectives. This study attempted to design a new pump nozzle, and to assess the differences in musculoskeletal load related to body posture when a price/volume display is mounted on the pump nozzle. Methods. For postural analysis, photographs recording the posture of 100 randomly selected customers while fueling at petrol pumps and the rapid upper limb assessment (RULA) technique were used. Results. The results of this study showed that RULA scores improved significantly after the newly designed pump nozzle was used. Conclusion. The newly designed pump nozzle is useful in reducing load related to body posture while fueling.     

烟气源热泵波纹板蒸发器冷凝换热特性数值研究

对波纹板蒸发器中的烟气冷凝换热进行数值模拟,运用Fluent软件得出烟气温度场、速度场、冷凝水浓度场;分析烟气特性和波纹板蒸发器的结构参数对冷凝换热的影响,发现当过量空气系数较小、烟气流速为2~3 m/s、烟道宽度为10~12 mm、波纹高度为18~20 mm、波纹节距为36~40 mm时,能带来较好的换热效果。通过与平板换热器进行对比,波纹板的冷凝换热效果优于平板,为工程设计提供理论基础和参考。     

Polychlorinated Biphenyls (Pcbs) Pollution in Sea of Japan

Deep waters of the Sea of Japan and surface waters of the Pacific Coast of Honshu and the northeast Sea of Japan were analysed for polychlorinated biphenyls (PCBs) pollution. the ΣPCB concentrations in solution in the Sea of Japan (50-3000 m) were between 140 and 1230 fg dm_-3. the space-integrated surface water concentration near the Pacific coast of northern Honshu was 140 fg dm_-3and for the surface water of the Sea of Japan was 230 fg dm_-3. Based on these analyses four water masses were deduced in the Sea of Japan during the summer months. It is shown for the first time in the Sea of Japan that polychlorinated biphenyls are excellent chemical indicators of not only the anthropogenic pollution, but also water masses.     

注水站泵房噪声治理措施及效果

针对注水站泵房的噪声源及产生原因进行分析,就机械、电磁等噪声源,采取设备改造、隔声、消声、吸声等噪声控制措施,实施效果较好。     

动力风泵房循环水余热回收方案设计

介绍了动力风泵房每年有大量的工业余热为没经过处理直接排放,造成能源的浪费,以及其解决的思路:利用水源热泵吸收动力风泵房中产生的余热来加热水源,变成洗浴用水,从而达到节能减排的目的.     

SIZING SMALL STORMWATER PUMP STATIONS1

ABSTRACT: Design of a stormwater pump station is a complicated procedure because of the large number of parameters that are involved. Even the most basic pump station serving a small catchment requires a computationally intensive iterative evaluation. However, the design problem consists primarily of finding the combination of temporary storage and pump capacity that accommodates runoff of the selected recurrence interval for the least cost. A procedure is developed for rapidly obtaining the needed relation between storage volume and discharge for small pump stations where a constant outflow can be assumed and the inflow hydro-graph can be represented using the modified rational method with rainfall given by a widely-used intensity-duration equation. Accepting the limitations of the modified rational method and the simplifications applied to pump station operation, the procedure provides an uncomplicated way of rapidly finding the stormwater runoff volume that needs to be temporarily stored for given values of pump discharge and activation water level (or, equivalently, activation storage volume). Ultimate determination of temporary runoff storage will depend on an economic analysis of the trade-off between storage volume and pump capacity.     

湖水源热泵系统尾水排放对湖泊富营养化进程的影响研究

以重庆市开县人民医院湖水源热泵工程为例,通过对该工程运行期间尾水受纳湖泊水域水温、氮、磷和浮游植物的长期监测,研究了湖水源热泵系统尾水对湖泊富营养化进程的影响。结果表明,夏季系统的长期运行导致了排放口附近水域水温的升高;当系统温排水水温在30℃以下时,温排水造成的温升使得排放口附近氮、磷含量升高,蓝、绿藻数量大幅增加,加速了湖泊的富营养化进程;当温排水水温达到33℃以上时,过高的温度会抑制藻类的生长。冷排水使湖泊排放口近水域浮游植物总量降低,且硅藻占总藻的比例增大,冷排水同时抑制了蓝藻和其他一些藻类的生长,对湖泊富营养化有一定缓解作用。但另一方面,由于温差较小,且冷排水的扰动作用加速了湖泊沉积物中营养盐的释放,因而冷排水对湖泊富营养化进程又有一定促进作用。