SPECIFICATIONS
| Model | XRY-1A |
| Heat capacity | (14400～14500) J/K |
| Resolution | 0.001K |
| Calorific value | ±60J/g |
| Repeatability error | ≤0.2% (Grade C) |
| Oxygen bomb withstand pressure | 20MPa |
| Temperature measurement range | (10～35)℃ |
| Operating environment temperature | 20℃±5℃, the temperature fluctuation is not more than 1℃ during one measurement |
| Store temperature measurement data | 31 |
| Relative humidity | ≤85% |
| Working power supply | AC (220±5%) V, 50Hz |
| Power consumption of the whole machine | not more than 150W |
| Dimensions | 600mmx460mmx430mm (LxWxH) |
DESCRIPTION
The MAS 5465- XRY-1A oxygen bomb calorimeter is based on the National Standard of the People’s Republic of China GB/T 213 “Method for Measuring the Calorific Value of Coal”, GB/T 384 “Method for the Determination of Calorific Value of Petroleum Products”, and the National Metrological Verification Regulation of the People’s Republic of China JJG672. Oxygen Bomb Calorimeter” and Shanghai Enterprise Standard Q/YXYY 10 “MAS 5465-XRY-1 Oxygen Bomb Calorimeter” are designed and manufactured.
The heat capacity of this instrument is 14400～14500J/K. It is suitable for measuring the calorific value of non-water petroleum products (gasoline, jet fuel, diesel and fuel oil, etc.) and combustible substances such as coal, coke, and paraffin by the calorimeter oxygen bomb method. The determination.
FEATURES
1. This instrument uses a self-sealing oxygen bomb, and its entire structure is made of stainless steel. It is strong enough to withstand the maximum pressure (60 to 70 atmospheres) generated by solid combustion and can withstand the greater pressure generated by liquid fuel.
2. The inner water cylinder of this instrument is made of stainless steel sheet, the cross section is pear row, the water volume of the water cylinder is 3000 grams, the water cylinder is equipped with an electric stirrer to ensure the uniform temperature of the water bath of the inner water cylinder.
3. The outer water jacket of this instrument is a double-layer container, which is filled with water during the experiment, and the water temperature in the cylinder is made uniform by the water jacket agitator to form a constant temperature environment that meets the test requirements.
Premium quality with CE & ISO certification.
ASTM D240 is the standard test method for determining the heat of combustion of liquid hydrocarbon fuels using a bomb calorimeter. It measures the energy released (calorific value) when a sample is burned in high-pressure oxygen, vital for evaluating fuels like gasoline, kerosene, and turbine fuels. [1, 2, 3, 4]
Key Aspects of ASTM D240 (Bomb Calorimeter)
- Purpose: Measures the gross heat of combustion (higher heating value) of liquid hydrocarbon fuels that are relatively non-volatile.
- Applications: Essential for assessing energy content in commercial/military jet fuels, aviation gasolines, diesel, and marine fuels.
- Principle: A weighed sample is burned in a high-pressure, oxygen-filled stainless steel bomb (crucible) submerged in a known amount of water. The resulting temperature increase is measured to calculate the heat liberated.
- Applicable Range: Suitable for liquid fuels with varying volatility (e.g., kerosines, light distillates, residual fuels).
- Measurement Units: Energy is typically expressed in calories, British thermal units (Btu), or Joules.
- Alternative Test Methods: While ASTM D240 is standard for liquid fuels, ASTM D4809 offers better precision for certain applications. [1, 2, 3, 4, 5]
Typical Apparatus Components
- Oxygen Bomb: A stainless steel vessel that holds the sample, crucible, and oxygen.
- Calorimeter Bucket: Contains water that absorbs the heat released.
- Stirrer: Ensures uniform water temperature.
- Temperature Measurement: Sensitive thermometer (e.g., Beckmann) to measure small changes within \(0.001^{\circ}C\).
- Ignition Circuit: Provides a spark to ignite the sample. [1]
Test Procedure
- Sample Preparation: A weighed fuel sample is placed in a crucible within the bomb.
- Oxygen Filling: The bomb is pressurized with oxygen, typically to a pressure of around 25-30 atmospheres.
- Combustion: The bomb is immersed in water and the sample is ignited.
- Temperature Rise: The temperature change in the surrounding water is recorded.
- Calculation: The calorific value is calculated based on the temperature rise, the water equivalent of the calorimeter, and the sample mass. [1, 2, 3, 4]
ASTM D240 specifically highlights that this method is generally used for liquid hydrocarbon fuels. It is not designed for heavily contaminated fuel samples, which might require different analytical techniques