一个无维的实证模型来预测用于冷却高湿度肉类的热传递系数,类似于用矩形柴油机进行冷却
Caleb E Wagner1, Leon Levine2, Girish M Ganjyal1
1School of Food Science, Washington State University, Pullman, Washington, USA.
Journal of food science
|July 5, 2025
概括
一个新的模型估计了冷却高湿度肉类类型 (HMMA) 的传热系数. 这项研究对于优化HMMA生产流程和提高产品质量至关重要.
科学领域:
- 食品工程 食品工程
- 热传递热量转移的方法
- 材料科学 材料科学 材料科学
背景情况:
- 优化冷却速率对于实现所需的纹理和纤维质量在全切肉类类似物中至关重要.
- 准确的传热估计对于设计连续食品加工中高效的冷却模具至关重要.
研究的目的:
- 开发一种实证无维关系,用于在高湿度肉类类型 (HMMA) 的连续冷却过程中估计传热系数.
- 为设计改进的冷却模具和扩大HMMA生产过程提供一个工具.
主要方法:
- 在不同冷却介质温度,产品质量流速和模具面积比下挤出基于小麦的HMMA.
- 持续地在现场测量产品和冷却介质的温度和质量流量.
- 维度分析和非线性回归适合无维度传热模型.
主要成果:
- 建立了一个无维模型,将努塞尔特数,格雷茨数和模拟尺寸比进行相关联: = A∙(Gz-1) B∙(C+D∙[1-a*]E).
- 该模型表现出高度的准确性 (RMSE = ± 4.9, p < 0.0001),并且在逻辑上受到理论限制.
- 该模型量化了冷却模块几何和换热器长度对传热系数的影响.
结论:
- 开发的经验模型提供了一种可靠的方法来估计HMMA冷却模具的传热系数.
- 这项研究为工程师和科学家提供了实际应用,旨在优化肉类模拟生产以提高质量和成本效益.
- 这些发现促进了HMMA过程的扩展,通过提供对冷却模设计和操作参数的见解.
相关概念视频
Mechanisms of Heat Transfer
526
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
526
Mechanisms of Heat Transfer II
3.5K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.5K
Mechanism of heat transfer
1.4K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.4K
Mechanisms of Heat Transfer I
4.7K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.7K
Specific Heat
63.3K
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
63.3K
Conduction, Convection and Radiation: Problem Solving
1.4K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.4K


