![]() ![]() The novel HRCS comprised two units-a CRCS and an airbox convector. Recently, a hybrid radiant cooling system (HRCS) was newly designed, adapted to the hot and humid climate. Moreover, it faces difficulty with increasing cooling outputs in extreme weather conditions. It is well known that the conventional radiant cooling system (CRCS) has limited adaptation to surrounding hot and humid conditions due to high air vapor condensation risk on the surface of a radiant cooling panel when unexpected humidity occurs, such as when opening windows or through the moisture generation of occupants. This study can provide the design references for the hybrid radiant cooling system and other cooling systems in hot and humid summer conditions. The overall cooling impact ratio of the HRCS with an airbox convector was approximately 185% higher than that of the AAS and 8.5% higher than that of the CRCS. The HRCS system released an additional 20–30% of cooling output, and it could adapt well in extreme hot and humid weather conditions compared to the AAS and the CRCS system. On the basis of the calculated energetic and exergetic performance, the HRCS had a higher exergy efficiency and a higher overall impact ratio. According to the results, the ambient conditions, i.e., the surrounding temperature and the humidity ratio, significantly impacted the cooling systems’ exergy efficiency ratio. The comparison analysis using the four different weather datasets showed simple and rational exergy efficiency and the overall impact ratio. This study utilized the building energy performance simulation program to analyze the cooling loads of office space in a building with numerical approaches. As a case study, an office building with cooling systems was examined in the summer season in four different cities: Beijing, Shanghai, Chengdu, and Guangzhou, China. This study suggested three cooling systems: a general all-air system (AAS), a conventional radiant cooling system (CRCS), and a hybrid radiant cooling system (HRCS). The microwave oven works with the concept of radiant energy (electromagnetic waves).This research investigated the exergy enhancement performance of a hybrid radiant cooling system adapting to a hot and humid summer conditions through comparative case studies and analyses. For example, when micro-waves (which forms part of the entire spectrum) are set-off in a microwave oven, the water molecules in the food are charged and caused to vibrate billions of times per second, generating heat that causes the food to cook. When radiant energy comes into contact with matter, it changes the properties of that matter. In the illustration above, you will see the different radiant energy levels represented by their wavelengths. ![]() White light, for example, is a form of radiant energy, and its frequency forms a tiny bit of the entire electromagnetic spectrum. The shorter the wavelength, the higher its frequency, and vice versa. The entire wave system from the lowest frequency to the highest frequency is known as the electromagnetic spectrum. There are different kinds of electromagnetic waves, and all of them have different wavelengths, properties, frequencies, and power, and all interact with matter differently. The energy in the electromagnetic waves is what we call radiant energy. These waves resemble the ripple (mechanical) waves you see when you drop a rock into a swimming pool, but with electromagnetic waves, you do not see them, but you often can see the effect of it. ![]() Now, the electrical field induced causes waves, called electromagnetic waves, and they can travel through a vacuum (air), particles or solids. ![]() That is possible by electromagnetic waves.īefore we go any further, let us understand what electromagnetic waves are.Įach time static energy from electric and magnetic force comes together, they induce an electric field around them.Īn example of an electric static force is the shock you get when you hold a metal doorknob.Īn example of a magnetic force is the pull that attracts metals to the magnet. The sun’s heat is not transmitted through any solid medium but a vacuum. For example, we receive the heat from the sun, which is located very far from the earth via radiation. It is a form of energy that can travel through space. Radiant energy is the energy of electromagnetic waves. ![]()
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