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The Second And Third Generation Chiller
The Second And Third Generation Chiller

The Convection Method Of Fermenting

What is a flow meter

When brewing beer, it is necessary to have a flow meter. Where will we use the flow meter in the brewery?

The first one is before the inlet of the Mash Tun and also the fill water of the Lauter Tun. The next one is after the heat exchanger. We can tell how much wort has gone into the fermenter. Of course, many tanks have sight glasses to help know the amount of brewing water or the amount of wort in the beer. However, breweries have flow meters to make it more accurate.
Flow Meters

Flow measurement is the quantification of the movement of a bulk fluid. Flow can be measured in a variety of ways. Positive displacement flow meters accumulate a fixed volume of fluid and then count the number of times the volume is filled to measure the flow rate. Other methods of flow measurement rely on the force generated by the flow of water as it overcomes a known restriction to indirectly calculate the flow rate. Flow can be measured by measuring the velocity of the fluid over a known area.

For liquids, different units are used depending on the application and industry, but may include gallons (US or Imperial) per minute, liters per second, bushels per minute, or, when describing river flow, Cumecs (cubic meters per second) or acres per foot per day. In oceanography, a common unit for measuring volumetric transport (e.g., volume transported by currents) is the Sverdrup (Sv), which is equivalent to 106 m3/s.

Modern innovations in measuring flow rates include electronic devices that correct for different pressure and temperature (i.e. density) conditions, nonlinearity, and fluid properties.

Magnetic flow meters

Magnetic flow meters, often referred to as “mag meter “s or “electromag “s, use a magnetic field applied to the metering tube, which produces a potential difference proportional to the flow rate perpendicular to the magnetic flux line. The potential difference is induced by an electrode perpendicular to the flow rate and the applied magnetic field. The physical principle of operation is Faraday’s law of electromagnetic induction. A magnetic flow meter requires a conductive fluid and a non-conductive pipe liner. The electrodes cannot be corroded in contact with the process fluid; some magnetic flow meters are fitted with auxiliary sensors to clean the position of the electrodes. The applied magnetic field is pulsed, which allows the flowmeter to counteract the effects of stray voltages in the piping system.

For this reason, magnetic flow meters are well suited for use in brewing beer. We hope the above will help you choose a flow meter when trying to purchase beer brewing equipment.

The Convection Method Of Fermenting
The Convection Method Of Fermenting

Why is it necessary to pump hot water from the bottom of the percolator before the juice is discharged?

If the wort tank and the fermenter are separate, the wort needs to be pumped from the wort tank to the fermenter. Before pumping, some professional and experienced brewers will inject hot water mainly from the bottom of the lauter tank until the hot water level is higher than the false bottom. On the one hand, the hot water eliminates the air between the bottom and the false bottom and avoids aeration of the wort. On the other hand, the hot water also preheats the false bottom and the percolator and supports the wort for proper fermentation.