43results about How to "High water saving rate" patented technology

The invention discloses a water-saving near-root reverse-seepage irrigation method. According to the method, water seepage pipes (5) with water seepage holes are connected with a water source at a high position, the water seepage pipes (5) are buried under the ground and below root systems (7) of crops (1), and mulching films are laid below the water seepage pipes (5); the water source is 0.5-1m above the ground; the water seepage pipes are slightly inclined, so that water inlet ends are slightly higher than water outlet ends; hole-free sections of 1-10cm are required to be reserved at tail ends of the water seepage pipes, and when the water seepage pipes are buried, the hole-free sections and port plugs are required to be exposed out of covering soil; when the water seepage pipes (5) are buried, a layer of sandy soil (6) with coarse particles is buried above the water seepage pipes (5). According to the method, 50-70% of water can be saved, and the yield per unit area can be improved by 25-30%; compared with sprinkling irrigation methods, the method has the advantages that 10-20% of the water can be saved and the yield per unit area can be improved by 10-15%.

The invention discloses an indirect air cooling method and a system with the working fluid of parallel-connected obverse and inverse refrigeration cycles. Based on the phase transition in the working fluid cooling process, a double-phase transition heat exchanger and a single-phase transition heat exchanger are respectively coupled with an obverse refrigeration cycle and an inverse refrigeration cycle which are connected in parallel; the saturated gaseous refrigerant from the phase-transition heat exchangers is compressed, boosted and then sent to an air-cooled radiator for exothermic condensation, then the condensed refrigerant enters a liquid storage tank and is decompressed through a throttle valve and sent to the phase-transition heat exchangers so as to complete the obverse refrigeration cycle; or the saturated gaseous refrigerant from the phase-transition heat exchangers is throttled and decompressed through a thermal expansion valve and then sent to the air-cooled radiator and the liquid storage tank, pressurized by a booster pump and finally sent back to the phase-transition heat exchangers so as to complete the inverse refrigeration cycle. The method and the system can bewidely applied to the cooling systems of the condensers in thermal power, nuclear power and other turbine-generator units or the cooling systems of the intercoolers in petroleum, chemical and other industries to reduce energy consumption, save investments, as well as improve water-saving rate and the adaptability of the cooling system to the environment; therefore, the method and the system are provided with promotional values and can produce larger social environmental benefits and economic benefits after implementation.

The invention provides a tube-plate evaporative condensing air-conditioning unit with packing. The unit comprises an evaporation and air supply unit and a compression and condensing unit. The evaporation and air supply unit consists of a drying and filtering device, an expansion valve, an evaporator and a centrifugal fan which are sequentially connected, and the compression and condensing unit isformed by connecting a compressor and a condenser; the condenser is connected with the drying and filtering device, and the compressor is connected with the evaporator; the air-conditioning unit is provided with a condensate recovery system which is formed by connecting a condensate recovering collector of the evaporator with the condenser by a tube or a water pump; and an indoor air supply system of the evaporation and air supply unit consists of an outdoor fresh air inlet of the evaporator, a unit air supply outlet and the centrifugal fan, or consists of the outdoor fresh air inlet of the evaporator, a unit return air inlet, the unit air supply outlet and the centrifugal fan. The tube-plate evaporative condensing air-conditioning unit has high heat exchange efficiency, and can realize maximal energy recovery and reduction of energy consumption and water consumption, effectively solves increased energy consumption resulting from increased fresh air volume of an air-conditioning system and realizes double performance of saving energy and water and health care.