149 results about "Saturation ratio" patented technology

An improved dryer (10) and drying methods are provided which increase overall dryer efficiency by maintaining substantially constant output air stream adiabatic saturation ratio and temperature values during the course of drying, notwithstanding the occurrence of upset conditions. The dryer (10) includes a dryer body (12), an input air heater assembly (14) including an air heater (32), and a control assembly (18). The dryer body (12) has a drying zone (30), with product inputs and outputs (20, 22) as well as an input (26) for a heated air stream and an output (28) for the cooled, moisture-laden output air stream. The dryer control assembly (18) includes temperature and humidity sensors (48, 50) coupled to controllers (54, 60) and a PLC (66). The controller (54) is coupled with an exhaust fan / damper unit (46) while controller (60) is connected with a fuel valve (36). In operation, the temperature and humidity of the output air stream are continuously measured by the sensors (48, 50), and the controllers (54, 60, 66) are operable to adjust the exhaust fan / damper unit (46) to regulate the relative proportion of output air exhausted to the atmosphere and recycled via conduit (52) for mixing with the input air stream, and also regulate the energy input to the dryer. Maintaining a substantially constant output air stream adiabatic saturation ratio and temperature allows dryer operation at significantly higher efficiencies as compared with prior systems.

A control method regulates an electronic expansion valve of a chiller to maintain the refrigerant leaving a DX evaporator at a desired or target superheat that is minimally above saturation. The expansion valve is controlled to convey a desired mass flow rate, wherein valve adjustments are based on the actual mass flow rate times a ratio of a desired saturation pressure to the suction pressure of the chiller. The suction temperature helps determine the desired saturation pressure. A temperature-related variable is asymmetrically filtered to provide the expansion valve with appropriate responsiveness depending on whether the chiller is operating in a superheated range, a saturation range, or in a desired range between the two.

Sizes or size distribution of aerosol particles of an aerosol gas stream is detected. A particle-free carrier flow is saturated in a saturated or (101) by a first condensing medium, where after the carrier flow(107) is mixed in a mixing section (103) turbulently with aerosol particle flow (108). Advantageously plurality of separate mixtures with different saturation ratios are provided and introduced to the first condensing environment (104) in order to condensate the condensing medium onto the aerosol particles. Depending of the saturation ratio the particles with different lowest original size are activated and growth in a growing section (104A) and / or in the condensing environment (104). After activation and growing the particles are detected by a detecting means(110).