在职业热暴露下分析和优化火车司机的热感觉
Zeyun Yang1,2, Wenjun Zhou1, Gang Xu2
1Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic and Transportation Engineering, Central South University, Changsha, China.
Frontiers in public health
|June 26, 2023
概括
通过使用辐射基础函数 (RBF) 算法优化空调系统,提高火车司机的热舒适度. 这项研究通过解决火车车中的热不适,提高了职业安全和健康 (OSH).
科学领域:
- 职业安全与健康问题 职业安全与健康问题
- 热舒适工程 热舒适工程
- 计算流体动力学的流体动力学.
背景情况:
- 长时间暴露于热不适会给火车司机带来重大职业安全和健康 (OSH) 风险,可能导致身体和精神伤害.
- 评估热舒适度的传统方法是不够的,因为它们不能准确地捕捉皮肤温度变化或适应动态的热环境.
研究的目的:
- 通过使用Stolwijk人类热调节模型,研究和优化火车司机的热舒适度.
- 通过优化火车通风系统设计,提高火车司机的热舒适度.
- 为了尽量减少设计优化流程的耗时性质.
主要方法:
- 使用斯托尔维克人体热调节模型进行热舒适度分析.
- 利用基于辐射基函数 (RBF) 近似的指针优化算法,以实现高效的设计优化.
- 在Star-CCM+中开发了一种火车司机热舒适模型,通过最佳拉丁超立方体设计 (Opt LHD) 采样了60个操作条件.
主要成果:
- 分析了空气供应温度,体积和角度以及太阳辐射和高度对局部和整体热感应投票 (LTSV和OTSV) 的影响.
- 在极端的夏季条件下,为火车的加热通风和空调 (HVAC) 系统确定了最佳的空气供应参数.
- 通过优化HVAC参数,成功提高了火车司机的热舒适度.
结论:
- 基于RBF的优化算法有效地提高了火车司机的热舒适度.
- 优化的HVAC参数显著减轻火车车内的热不适.
- 这种方法有助于提高火车司机的职业安全和健康.
相关概念视频
Thermal Stress
2.5K
If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
2.5K
Thermal expansion and Thermal stress: Problem Solving
1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K
Responses to Heat and Cold Stress
13.6K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.6K
Thermosensation
30.5K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
30.5K
Mechanisms of Heat Transfer II
3.3K
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...
3.3K
Assessing Body Temperature - Oral
780
Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
780


