探索作为太阳能应用的固体热储介质:实验调查与使用OpenFOAM的数值建模相结合
Ashutosh Dev1,2,3, Sunam Amatya1,2, Yogesh Dumre1,2
1Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Nepal.
Heliyon
|November 18, 2024
概括
这项研究介绍了一种新的太阳能热储存 (STS) 系统,使用用于非日照时间的. 优化的STS有效地储存和传输热量,提高家庭应用的太阳能可靠性.
科学领域:
- 可再生能源工程可再生能源工程
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
背景情况:
- 间歇性太阳能供应挑战了可靠的应用,特别是在新兴经济体.
- 减少对传统燃料的依赖,需要为提供可持续的能源解决方案.
- 现有的太阳能系统往往缺乏有效的热储能,用于非日照时间.
研究的目的:
- 开发和优化使用用于家庭太阳能的新型太阳能热储存 (STS) 系统.
- 为了评估作为STS材料的温度适应性,效率和保温能力.
- 为设计高效的太阳能热储存系统提供实用指南.
主要方法:
- 使用OpenFOAM进行数值模拟,分析热传递并确定最佳块尺寸.
- 通过太阳能诱导的加热-冷却周期进行实验验证.
- 用各种食物类型 (水,,) 进行实践试验,以评估性能.
主要成果:
- STS在5.5小时的加热后达到235°C的最高温度.
- 储存的热量持续温度高达160°C用于任务.
- 实验结果证实了对于高效传热和持续的适用性.
结论:
- 综合数值和实验方法验证了作为中太阳能热储能的有效材料.
- 优化的STS系统提高了太阳能可靠性和适应性,以满足持续的需求.
- 这项研究为设计和优化用于实际太阳能应用的热储系统提供了经过验证的方法.
相关概念视频
Mechanisms of Heat Transfer I
4.2K
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.
4.2K
Heat Capacity: Problem-Solving
492
The heat capacity of a gas is the amount of heat energy required to raise the temperature of a unit mass of gas by one degree Celsius. It is an important thermodynamic property of gases, and its determination is essential in many industrial and scientific applications. Here are the steps to solve problems related to the heat capacities of gases:
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
492
Thermal Sigmatropic Reactions: Overview
2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
Conduction, Convection and Radiation: Problem Solving
1.2K
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...
1.2K
Thermal expansion and Thermal stress: Problem Solving
1.1K
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...
1.1K
Thermochemical Equations
28.3K
For a chemical reaction (the system) carried out at constant pressure – with the only work done caused by expansion or contraction – the enthalpy of reaction (also called the heat of reaction, ΔHrxn) is equal to the heat exchanged with the surroundings (qp).
28.3K


