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You are here: Home1 / Blog2 / LPG Leisure Time3 / Gas Regulator, Gas Cylinder & more4 / What withdrawal volume do I get out of one gas cylinder?

What withdrawal volume do I get out of one gas cylinder?

8. January 2018/in Gas Regulator, Gas Cylinder & more, Gas Regulator, Gas Cylinder & more, General, LPG Everyday, LPG Knowledge, LPG Leisure Time
Approximate reading time: 3 minutes

LPG is an ideal form of energy. Particularly when it comes to mobile applications, such as gas-powered barbecues, heating and cooling caravans or operating heating mushrooms and heaters. And why is it so popular? Among other reasons, this is because the cylinder is a perfect container for transporting the gas. However, very few people know what withdrawal volume of the propane-butane mixture they actually obtain from the cylinder. This can be really surprising, especially when operated constantly.

There are now various sizes of gas cylinder available, but the most common are still those with filling weights of 5, 11 and 33 kilograms.

Inhaltsverzeichnis

  • Small cylinders
  • Large cylinder
  • Time parameter
  • Withdrawal volume from a 5 kg gas cylinder
  • Withdrawal volume from a 11 kg gas cylinder
  • Withdrawal volume from a 33 kg gas cylinder

Small cylinders

The smaller, and very handy, 5 and 11 kg gas cylinders are primarily used for private applications, like operating

  • a gas-powered barbecue,
  • a patio heater,
  • a fridge in a motor caravan or
  • a simple heater.

But these small cylinders are also popular among tradespeople in the industrial sector. They act as a source of energy for soldering work in renovation and heating work, or for heating and burning work in road works.

Das Grillen mit Flüssiggas wird auch in Deutschland zunehmend beliebter. Bevorzugt dafür verwendet: die handlichen 5 und 11 kg-Flaschen.

Barbecuing with LPG is becoming more and more popular in Germany. The preferred source of fuel: the handy 5 and 11 kg cylinders.

Large cylinder

The 33 kg gas cylinders are not called “large cylinders” for nothing, which makes them considerably more cumbersome than their two little brothers. The large cylinders are mainly used in all places where a larger volume of LPG is required over a longer period of time. For example, this can be the case at food stalls at markets or for operating gas stoves in restaurants.

Time parameter

The volume of LPG you obtain out of the cylinders depends, among other things, on the period of time that you use them. In principle, the mode of withdrawal can be divided into three categories:

  How do commercial operation and private operation of a gas barbecue differ?

  • Short-term – quickly barbecuing two lots of bratwurst
  • Periodic – a few hours of barbecuing at a big party, but with interruptions as the guests arrive at different times
  • Long-term – for example, continuous operation of a gas heating device in winter

Withdrawal volume from a 5 kg gas cylinder

From the nominally smallest cylinder, at least in the short term, the user obtains 1.5 kilograms per hour (kg/h) – this is around 19 kilowatts (kW) – quite a lot of the propane-butane mixture. But the longer they withdraw, the more the withdrawal yield decreases. If you withdraw LPG over a longer period of time, you yield barely 0.2 kg/h. This value corresponds to an output of around 2.6 kW.

  How many kilowatt hours correspond to a kilogram of LPG (propane)?

Die Entnahmemenge aus einer 5 kg-Gasflasche unterscheidet sich beispielsweise je nach Dauer der Entnahme, der Außentemperatur und der benötigten Leistung.

If you look at these figures and think that you actually don’t get very much energy out of a gas cylinder, you should look at the heating value of the medium LPG – especially when compared to other sources of energy: What is the heating value of media such as fuel oil, LPG and natural gas?

Withdrawal volume from a 11 kg gas cylinder

Intermittently, you withdraw a healthy 2 kg/h LPG from the 11 kg cylinder, more than double as big as the 5 kg cylinder. Nevertheless, this corresponds to just under 25 kW. But with periodic or constant withdrawal, the curve continues to decrease here as well. If you draw gas out of the 11 kg cylinder over a long period of time, you can calculate this as approx. 4 kW.

Die Entnahmemenge aus einer 11 kg-Gasflasche unterscheidet sich beispielsweise je nach Dauer der Entnahme, der Außentemperatur und der benötigten Leistung.

Withdrawal volume from a 33 kg gas cylinder

With a filling weight of six or three times greater than the others, the 33 kg cylinder is the largest in Germany. If you only need LPG for a short time, you obtain almost 3 kg/h or 40 kW. If you continually withdraw LPG from the cylinder over hours, this still gives you an output of almost 8 kW.

Die Entnahmemenge aus einer 33 kg-Gasflasche unterscheidet sich beispielsweise je nach Dauer der Entnahme, der Außentemperatur und der benötigten Leistung.

However, it is always an unmistakable sign that the withdrawal volume and withdrawal output do not match when the gas cylinder ices over.

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Approximate reading time: 8 minutes

Information regarding technical systems

This blog will never ask members of the public or unqualified persons to make changes to or fiddle around with technical systems themselves.

In accordance with the Industrial Safety Regulation (BetrSichV), a qualified person must take care of a system which requires monitoring.

A qualified person is someone who has the specific specialist knowledge required. This knowledge is gained by way of a professional apprenticeship, corresponding professional experience or current occupational activity.

Please note that the texts are based on information, regulations and standards for Germany. Please always check the rules and regulations in the relevant country of destination and consult specialists if necessary.

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