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   1. To improve the efficiency of centrifugal pumps    The first step in the selection of more than the selection of suppliers of the program, considering the premise of cost-effective as far as possible the selection of programs with high efficiency; the second step, a certain number of professionals stationed in the producer, the key to the efficiency of the pump Components such as impeller, pump, pump cover, flow guide (vertical long axis pump) and other manufacturing quality control, especially for the blade of the impeller, water outlet, blade indexing, the shape of the flow channel, finish, etc. Quality control, so that the delivery of the product under the current production conditions, efficient products; The third step in the production site installation and commissioning process, to ensure that the foundation of the pump solid, well with the drive machine, before and after the valve Switch flexible, reasonable pipeline layout, on-site control of safe and feasible, all running monitoring instruments complete and accurate to ensure that the pump operation process can be real-time monitoring; The fourth step is in the long-term operation of the pump to pay attention to the equipment inspection, found that Abnormal circumstances immediately reflect the report, in the normal minor repair, overhaul cycle, the vulnerable parts to be checked replacement to ensure long-term efficient and safe pump operation.    2. Optimize the existing pump    Adjusting the impeller diameter and pump speed will have an impact on the pump's flow head and shaft power but have no effect on the efficiency curve, allowing the pump to work in a high-efficiency zone. The above adjustment flow head is a certain range of limits, if the conditions change too much, the original pump may have to consider modified.    Outdoor air supply pipe to be considered waterproof leakproof measures, outdoor installation side of the air supply pipe units to be set to a certain degree of slope, roof installation unit outdoor air supply pipe must also be waterproof. The longer pipe is designed as multi-section air duct with different specifications according to the air volume. The pipe is connected by a variable-diameter pipe. The adjustable pipe should not be set too much. Generally, the whole system does not exceed four and the length of the variable-diameter pipe is ≥2 (Dd). Air supply pipe and air conditioner connection at the application of soft pipe, outdoor air supply pipe should be designed to keep warm, indoor generally do not need insulation.    A circulating pump continuously withdrawn water in the tank, and uniformly sprayed on the filter layer by evaporation of the water distribution system, evaporative cooling air into the outdoor heat medium in the evaporative cooling medium CELdek (honeycomb filter layer of special material, So that the cooling effect is more satisfactory, Sweden's high-tech patent products) fully heat exchange with water, add water to evaporate heat cooling and cool, clean air from the low-noise fan pressurized into the room, the indoor hot air discharged to Outdoor, so as to achieve the purpose of indoor cooling.