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How to calculate the impact energy and impact velocity of a thermal and cold shock test chamber?
Date: Apr 23,2024 Views: 139
How to calculate the impact energy and impact velocity of a thermal shock test chamber?
A thermal shock test chamber is a type of test equipment used to evaluate the performance of materials in extreme temperature environments. It simulates real-world temperature shock phenomena by rapidly changing the temperature environment in which the sample is exposed in a short period of time. Impact energy and impact velocity are two important parameters for evaluating the performance of a thermal shock test chamber. So, How to calculate the impact energy and impact velocity of a thermal and cold shock test chamber?Huanyi Instruments will provide you with detailed answers.
1. Calculation method of impact energy of thermal shock test chamber
Impact energy refers to a temperature conversion process in the thermal shock test chamber, the test chamber can transfer the maximum energy. It is usually in joules (J) for the unit. The formula for calculating the shock energy is as follows:Shock energy (J) = cooling capacity (kW) × temperature difference (℃) × time (s)
Among them, the cooling capacity refers to the cooling capacity of the test chamber under standard working conditions (room temperature 25 ℃, relative humidity 50%), the unit is generally kW. temperature difference refers to the temperature difference between the high greenhouse and the low greenhouse of the test chamber, the unit is generally °C. Time (s) is the time it takes the test chamber to move from the high greenhouse to the low greenhouse. Time refers to the test chamber from the high greenhouse switch to the low greenhouse or from the low greenhouse switch to the high greenhouse time required, the unit is generally seconds (s).
2. Calculation of the impact speed of the thermal shock test chamber
Impact speed is the cold thermal shock test box in a temperature conversion process of the rate of temperature change. It is usually degrees Celsius per minute (℃ / min) for the unit. The formula for calculating the shock velocity is as follows:Shock velocity (℃ / min) = temperature difference (℃) / time (min)
Where temperature difference, as above, is the temperature difference between the high and low greenhouse of the test chamber. Time refers to the time required for the test chamber to switch from the high greenhouse to the low greenhouse or from the low greenhouse to the high greenhouse, and the unit is generally minutes (min).
3. Example of thermal shock test chamber
Known Huanyi instrument HYTS total power of 19Kw, the temperature range of -70 ℃ ~ 180 ℃, the conversion time of 5min, the calculation of the thermal shock test chamber impact energy and impact speed.(1) Calculation of impact energy
Impact energy (J) = cooling capacity (kW) × temperature difference (℃) × time (s)Known refrigeration capacity of 19 kW, the temperature range of -70 ℃ ~ 180 ℃, temperature recovery time of 5 minutes, we first need to calculate the temperature difference:
Temperature difference (℃) = high temperature (℃) - low temperature (℃) = 180 ℃ - (-70 ℃) = 250 ℃
Next, we convert the temperature difference and time to seconds:
Time (s) = Temperature recovery time (min) × 60 = 5 min × 60 = 300 s
Now we can calculate the shock energy:
Shock energy (J) = 19 kW × 250°C × 300 s = 14,250,000 J
(2) Calculation of impact velocity
Shock velocity (℃ / min) = temperature difference (℃) / time (min)We already know that the temperature difference is 250°C, now we just need to keep the time as minutes:
Shock velocity (°C/min) = 250 °C / 5 min = 50 °C/min
In summary, the impact energy of the HYTS three-box thermal shock test chamber is 14,250,000 J and the impact speed is 50 °C/min.
It should be noted that, in practice, the impact speed and impact energy of the thermal shock test chamber may be affected by a variety of factors, such as the structural design of the test chamber, the type and charge of the refrigerant, the control system and so on. Therefore, these factors should be fully considered when purchasing and using the thermal shock test chamber to ensure the accuracy and reliability of the test results.
Summary: With the above formula, we can easily calculate the impact energy and impact speed of the thermal shock test chamber. This is important for evaluating the performance of the test chamber and selecting suitable test conditions. Hope this article can help you!
