Hyperloop may sound familiar to some people. Hyperloop is the concept of high-speed transportation system initiated by Elon Musk. The fast train has just announced and will go into some countries and for you who do not know how the transportation system works; I hope this article can be useful.
Musk, CEO of Tesla and SpaceX Hyperloop proposed the concept in 2012. Later he released a white paper that describes how the transport system works.
The initial idea Hyperloop Musk is a tube that allows ultra fast transit between San Francisco and Los Angeles. Preliminary analysis indicates that a route can be reached within 35 minutes, which means passengers can travel a distance of 560 km with an average speed of 600 mph at full speed up to 760 mph. Since Musk made the idea of open-source, there are several companies and hundreds of academic research teams now working on Hyperloop technology, vehicle title loans but the leader now looks held by Hyperloop One, as reported by Science Alert, Thursday (03/09/2017).
The startup then took the first demonstration of a propulsion system Hyperloop in May last year and in October in the same year; they announced plans for a system to carry Hyperloop passengers. It was planned to be built in the United Arab Emirates (UAE) at first, which connects the cities of Dubai and Abu Dhabi.
The route stretches for 159 km and usually takes about 2 hours by car, can be reached in just 12 minutes. The company said the pipeline will be ready in 2020, but before that happens, they must demonstrate that the prototype of DevLoop that is working in Nevada. The prototype is expected can reach expected speed. So how does Hyperloop work exactly? One of the “expensive” things of Hyperloop is its unconventional construction. The construction is viewed as one of the most futuristic transportation devices ever.
This special line-shaped pipe equipped with a round cross section and the full use of steel material. The environment inside the giant pipe is made closer to the vacuum. The vacuum condition is paramount, because with the thin air density in the pipe, the friction between the capsule and the air inside the tube can be engineered to be very small. This makes the capsule able to go super fast. Naturally, the thermal energy flows from high-temperature condition to low-temperature condition. The natural heat transfer can be either conduction, convection, or by radiation. Meanwhile, in order to transfer heat from a lower temperature medium to a higher temperature medium, it requires a special effort so that it can resist the natural heat transfer. To be able to do the work, we need a special tool called heat pump. Heat pump is a device to transfer heat energy from a heat source, to the destination medium by the term heat sink. Heat pump is designed to absorb heat energy from the low-temperature room and throw it into the hotter room.This tool will need a supply of power from the outside so that it can move energy from the heat source to the heat sink. In this article I will discuss about a popular heat pump type, namely mechanical refrigerator:
Mechanical refrigerator
Mechanical refrigerator or also known as a mechanical heat pump uses the properties of a volatile and condensed special fluid. Fluid which we know as the refrigerant is made to perform a cycle so that it can absorb heat in the cold air, and remove the heat in the hot air. This is the main principle of mechanical refrigerator Shortly, the refrigeration system is composed of four main components: compressor, condenser, expansion valve (also called choke valve and metering device), and evaporator. We should be aware that refrigeration cycle begins with the entry of the refrigerant with thermodynamic phase of saturated steam to the inlet side of the compressor. Passing compressor and compressed refrigerant will increase the pressure and at the same time will make the temperature increased. The heat loss from the refrigerant may occur in addition to assisted with the use of a fan, as well as refrigerant’s superheater temperature that is always hotter or higher than the temperature of the cooling medium. This process of heat dissipation occurs in the condenser components. I hope the above explanation can help you to understand how exactly the working principle of mechanical refrigeration.
Methods of teaching and learning seem some tool to achieve the goal of teaching and learning. They all apply to both teachers and for students. Sometimes some methods are distinguished by learning techniques. Teaching and learning methods have more procedural nature while technical has more implementation nature. It can be concluded that the learning strategy consists of methods and techniques or procedures that ensure students achieve the learning objectives. More comprehensive strategy is a combination of method and technique of teaching. Teaching techniques are part of the teaching strategies.
The link between teaching and learning strategies with the goal of teaching
All strategies in teaching and learning are the ways to convey the subject matter in a teaching environment that includes nature, the sequence of activities that can provide a learning experience to students and scope. Teaching and learning strategies are not only limited to the procedures of the learning activities, but also including teaching materials or packages.
Teachers are expected to be able to identify four types of discussions as a method in teaching. All the strategy is chosen to achieve the goal of teaching. For example, students are asked to put forward four forms of examples of discussion ever seen, students are asked to read two books about the kinds of discussions, students are asked to demonstrate the ways discussed in accordance with the subject that has been studied, and the other groups watching and noting shortcomings to be discussed after the demonstration, and for the last, the students are expected to record the results of the class discussion.
The meaning of strategy in teaching is broader than its methods or techniques.
