Drying with heat exchangers (radiators)
Garlic can be dried by heating up the process air with heat exchangers (radiators) connected to one central boiler or boilers.
Example of 3 small modular boilers connected by a cascade arrangement.
Example of 1 large modular boiler
In the case of a central boiler, water is warmed up and brought to the heat exchange unit via pipes (to and return).
Heating unit with: Battery or radiator, Pump, 3 away mixing valve with engine (right top)
The warm water warms up the radiator (with thin slats).
Air sucked through the radiators is brought to the correct temperature by the radiator.
A pump ensures that water is pumped continuously through the radiator.
Hot water from the boiler heats up the radiator even more, heating up the air. The ABC processor automatically ensures the supply of boiler air is high at a large temperature difference; and lowers flow when a smaller difference is measured. This ensures that a constant desired air temperature is quickly reached.
The ABC processor controls 1 or more modular boilers. In the case of heat demand, the first boiler is started at minimum capacity. In the case of increasing demand, the capacity is automatically increased and possibly a2nd, 3rd etc boiler is started.
Geconditioneerd drogen van knoflook; droger door afkoelen en weer opwarmen van de proceslucht. Dankzij sterk afkoelen wordt vocht door condensatie uit de proceslucht onttrokken. Vervolgens wordt de lucht weer opgewarmd zodat weer vocht kan worden geadsorbeerd. Er kan dan bij lagere temperaturen voldoende vocht worden opgenomen.
Drying with dried air by condensation
Plate Heat Exchanger; energy from gas passes to water
This indirect system has a loss of about 4-5% on energy due to heat transmission from gas to water. However, this is more than compensated by the fact that excess energy (heat) can be issued in other places; other drying sections or heating up areas or floors.
From the central water buffer, hot water can be easily transported to different places via pipes.
Example of an ABC line page with the central tank and flow of hot gas (right) and hot water
At the drying sections, hot water is added to the radiator. With a modular 3-way mixing valve, the correct amount of hot water is fed by the radiator. The desired temperature can be achieved and maintained perfectly.
Excess energy (during cooling) can be used to:
- warm up offices and processing rooms.
- warm floors (dry)
- keep dock shelters frost-free
In the Netherlands, in new business premises (with winter cooling); the floor is often equipped as a condenser. Power for the condenser fans is no longer necessary (no noise) and the floor remains dry and warm in winter.
Because the indirect method is most applied, I will explain it further.