Radiant cooling and fresh air integrated system with adjustable heat-humidity ratio, and operation method

Abstract

The invention provides a radiant cooling and fresh air integrated system with an adjustable heat-humidity ratio, and an operation method, for improving the operation efficiency of the system while separate control over temperature and humidity is achieved. The radiant cooling and fresh air integrated system with the adjustable heat-humidity ratio comprises a fresh air dehumidifying device, a radiant cooling device, a compressor, a condensing device and a throttling valve, wherein the fresh air dehumidifying device comprises a first evaporator, a fresh air fan and a fresh air opening which aresequentially arranged in an air direction; the radiant cooling device comprises a second evaporator, a water storage tank and a radiant cooling tail end; the compressor, the condensing device, the throttling valve, the first evaporator and the second evaporator are sequentially connected. In the embodiment, a non-azeotropic refrigerant is adopted, a low-temperature cold source is generated in a low-temperature section to cool and dehumidify fresh air to be sent into a room, and thus indoor humidity adjustment is completed; high-temperature chilled water generated in a high-temperature sectionis supplied to the radiant cooling tail end to absorb indoor heat, so that indoor temperature adjustment and independent treatment and control over temperature and humidity are achieved; and the equivalent evaporation temperature of the non-azeotropic refrigerant rises, and the operating efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of indoor temperature and humidity control, in particular to an integrated system and operation method of radiation cooling and fresh air with adjustable heat-humidity ratio. Background technique [0002] With the continuous development of the social economy, residents' demand for residential thermal comfort is gradually increasing. The radiant heating and cooling air-conditioning system is widely used by the industry and academia because of its advantages such as stable thermal performance, comfortable feeling of no blowing, high-temperature cooling and low-temperature heating energy-saving potential, etc. focus on. The capillary end of the radiant air conditioner is generally connected to the high-temperature chilled water of 16-20°C provided by the heat pump unit as a radiant cooling source. In addition, it needs to meet the dehumidification requirements. Usually, a traditional cooling and dehumidificatio...

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Problems solved by technology

[0004] The non-azeotropic working medium produces a slip temperature during the phase change process, which effectively improves the operating efficiency of the unit. However, during operation, due to the non-equivalent stagnation of the non-azeotropic working medium in the heat exchanger, component migration or Refrigerant leakage will cause the concentration of refrigerant components to deviate from the initial concentration and affect the operating efficiency of the refrigeration system. Therefore, how to adjust the mixed refrigerant in the zeotropic mixed refrigerant refrigeration process according to the active needs of the radiant air conditioning system or the concentration change caused by passive leakage The ratio is particularly critical and important

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