A heating system for use with a can dryer or oven includes a gas burner, an electrical heating element, a heating chamber structured to heat cans using air heated by the gas burner and/or the electrical heating element, a circulation system structured to move air from the gas burner and the electrical heating element to the heating chamber, and a control system structured to selectively control the gas burner and the electrical heating element to switch between a first mode where the gas burner and the electrical heating element are active and both heat air provided to the heating chamber and in a second mode where the gas burner is inactive and the electrical heating element is active.

The noodle driving apparatus includes an enclosure having a lateral partition separating the enclosure into an upper chamber and a lower chamber. At least one first cool-air provision device and at least one warm-air recovery device are disposed to a side inside the upper chamber. A number of first cool-air inlets and warm-air inlets are configured on the partition toward another side of the upper chamber. Noodles to be dried are placed in the lower chamber. Cool air produced by the first cool-air provision device is introduced into the lower chamber through the first cool-air inlets to absorb moisture from the noodles. Warm air produced from the first cool-air provision device is collected by the warm-air recovery device and introduced into the lower chamber through the warm-air inlets to dry the noodles. The noodle driving apparatus thereby achieves improved drying performance, enhanced energy consumption, and better drying quality.

A dryer apparatus is disclosed comprising a container having a container inlet and outlet, a pump that is configured to motivate a first air-vapor mixture flow via the container inlet and via the container outlet, a heating device configured to heat the first air-vapor mixture, a selector with at least two states, a compressor that is configured to compress and motivate a part of the first air-vapor mixture flow as a second air-vapor mixture flow, to flow through a first heat exchanger and to flow through a second heat exchanger and a pressure reducing device that is configured to reduce the pressure of said second air-vapor mixture downstream said first heat exchanger. The selector is configured to direct most of the first air-vapor mixture to flow in a closed cycle through the container, or configured to exchange most of the first air-vapor mixture with air located outside the apparatus.

A system and method for drying individual biomass units. Turbine exhaust heats ambient air to produce heated air, which passes through a conveyor system that carries a quantity of biomass product to an endpoint collection area. Heated air with fine product particles is ducted to a series of cyclonic particle separators and collected.

A heat pump dryer includes a main casing having an air inlet channel and an air outlet channel, a compressor, a first heat exchanger positioned in the air inlet channel, a second heat exchanger positioned in the air outlet channel, a fan provided in the air inlet channel, and an energy efficient heat exchanger. The energy efficient heat exchanger has a first portion partially exposed to the air inlet channel, and a second portion partially exposed to the air outlet channel. Air is arranged to enter the air inlet channel to sequentially perform heat exchange with the first portion of the energy efficient heat exchanger and the first heat exchanger. Air passing through the air inlet channel is arranged to enter the air outlet channel to sequentially perform heat exchange with the second portion of the energy efficient heat exchanger and the second heat exchanger.

The noodle driving apparatus includes an enclosure having a lateral partition separating the enclosure into an upper chamber and a lower chamber. At least one first cool-air provision device and at least one warm-air recovery device are disposed to a side inside the upper chamber. A number of first cool-air inlets and warm-air inlets are configured on the partition toward another side of the upper chamber. Noodles to be dried are placed in the lower chamber. Cool air produced by the first cool-air provision device is introduced into the lower chamber through the first cool-air inlets to absorb moisture from the noodles. Warm air produced from the first cool-air provision device is collected by the warm-air recovery device and introduced into the lower chamber through the warm-air inlets to dry the noodles. The noodle driving apparatus thereby achieves improved drying performance, enhanced energy consumption, and better drying quality.

A heat pump dryer includes a main casing having an air inlet channel and an air outlet channel, a compressor, a first heat exchanger positioned in the air inlet channel, a second heat exchanger positioned in the air outlet channel, a fan provided in the air inlet channel, and an energy efficient heat exchanger. The energy efficient heat exchanger has a first portion partially exposed to the air inlet channel, and a second portion partially exposed to the air outlet channel. Air is arranged to enter the air inlet channel to sequentially perform heat exchange with the first portion of the energy efficient heat exchanger and the first heat exchanger. Air passing through the air inlet channel is arranged to enter the air outlet channel to sequentially perform heat exchange with the second portion of the energy efficient heat exchanger and the second heat exchanger.

A closed variable-frequency heat pump drying device with a heat regenerator includes a variable-frequency compressor, a condenser, a throttling valve, an evaporator, a heat regenerator, a three-way valve, a variable-frequency fan, an air inlet temperature sensor, an air inlet humidity sensor, a drying bin, an air outlet temperature sensor, an air outlet humidity sensor and a controller. The controller regulates frequency of the variable-frequency compressor by comparing magnitudes of actual and set air inlet temperatures; a ratio of a straight-through air volume to a regenerated air volume of the three-way valve by comparing magnitudes of actual and set air inlet humidity; and frequency of the variable-frequency fan by comparing magnitudes of actual and set air humidity difference and magnitudes of actual and set air temperature difference of medium air entering and exiting the drying bin.

A heat pump dryer includes a main casing having an air inlet channel and an air outlet channel, a compressor, a first heat exchanger positioned in the air inlet channel, a second heat exchanger positioned in the air outlet channel, a fan provided in the air inlet channel, and an energy efficient heat exchanger. The energy efficient heat exchanger has a first portion partially exposed to the air inlet channel, and a second portion partially exposed to the air outlet channel. Air is arranged to enter the air inlet channel to sequentially perform heat exchange with the first portion of the energy efficient heat exchanger and the first heat exchanger. Air passing through the air inlet channel is arranged to enter the air outlet channel to sequentially perform heat exchange with the second portion of the energy efficient heat exchanger and the second heat exchanger.

A drying system having a container, an air system, a sensor, and a control system. The control system is programmed to receive a measurement from the sensor and generate an air system instruction based on the measurement. The air system instruction corresponds with at least one of the temperature, flow rate, and/or pressure of airflow directed to the container by the air system. The air system adjusts the temperature, flow rate, and/or pressure of the airflow based on the air system instruction generated by the control system. A process for drying an agricultural product. A drying system having a floor with apertures that are sized and spaced so that a volumetric flow rate of the airflow through the apertures is between 75% to 100% of a maximum volumetric flow rate of the air system.