Make certain powerless cooling technological know-how by applying purely natural cooling


A new cooling technological know-how has been made that stores cold heat in the cold wintertime period and makes use of the cold warmth saved in the summertime to increase constructions these as residences.

On August 30, Dr. Younger-Jik Yoon's study crew at the Korea Institute of Strength Research's Energy Community Lab (President Jong-Nam Kim) declared that they experienced succeeded in creating a warmth exchanger working with automobile- bubble vibration that can be applied to awesome houses in rural parts in the summer time by having gain of the chilly warmth in the wintertime.

Bubble self-vibration refers to a phenomenon in which snails, which includes bubbles, vibrate promptly without external power when there is a temperature change among the two sides.

The temperature indoors through the very hot season approaches 50 ~ 70 ℃, which is lethal for crop expansion. Whilst it relies on electric cooling gear to avoid temperature increase, there is a restrict and the high strength charges location a terrific load on farmers cultivating the facilities.

In unique, this calendar year it was far more urgent to develop a cooling engineering of a new principle that employs purely natural electrical power or the principle of ecological natural cooling relatively than electrical cooling, which consumes a lot of energy thanks to the increase in electrical power tariffs thanks to to superior oil selling prices.

Cold heat output dependent on substantial performance and very low price tag warmth exchange technological know-how

Dr. Younger-jik Yoon's research crew has succeeded in creating a substantial-effectiveness heat exchange product that uses bubble self-vibration devoid of applying external energy, opening a new period of cooling technological innovation.

The heat exchanger created by the investigation crew consists of a tortuous capillary tube related to the cold exterior air or a cooling tank and the refrigerant inside of the tube. In addition, as a storage medium for chilly underground air, h2o is stored in a cooling tank.

There is a temperature difference among the chilly outside the house and the underground drinking water in winter. In this natural environment, the interior coolant vibrates speedily with the temperature variation transpiring on the two ends of the heat exchanger designed by the study group, a movement happens and a substantial total of it is shipped speedily. As a result of this, the heat of the groundwater is radiated to the cooler exterior, and the h2o temperature slowly decreases, and is saved and employed right until summertime.

As no exterior electric power supply is needed to operate the warmth exchanger, there is no working price load. In addition, as a massive sum of heat can be transferred applying latent heat by means of stage transform, the ability use can be lessened by far more than 50% and the dimensions by additional than 30% in comparison to current warmth transfer technological know-how, maximizing cooling and warmth production effectiveness and reduction of unit expense of production products.It is cost-effective for the reason that it can be saved.


Dr. Youthful-jik Yoon's study crew has installed a heat exchanger for making cold heat at Seoul Nationwide University's Pyeongchang Campus demonstration site in Pyeongchang-gun, Gangwon-do given that previous March and has been conducting experiments of chilly heat output and storage. In this way it was uncovered that chilly drinking water of about 4.5 ° C was produced which was saved in the underground storage tank with a capability of 1 ton with a creation potential of refrigeration warmth of about 1 kW.

In certain, as this is a demonstration outcome right after March, cold drinking water beneath 4.5 ℃ is predicted to be developed in reduced exterior air problems.

As a result of this experimental end result, the research crew intends to boost the capability and general performance of the warmth exchanger and show the offer of cooling to a 330 m² (100 pyeong) glass greenhouse in the Seoul National College Pyeongchang Campus Clever Farm Advanced Agricultural Elaborate. , which will be done in October. It also options to develop to cooling and air conditioning systems for several consumers, these kinds of as industrial-grade good farms and town properties.

Dr Yoon Young-jik claimed, “It is crucial to be certain significant-performance, reduced-cost, renewable strength-based mostly cooling technology to boost food items security in reaction to the world climate disaster.

In the meantime, this research was carried out with the help of the wise farm multi-ministerial offer innovation technology growth project and the study institute base job jointly hosted by the Ministry of Agriculture, Food and Rural Affairs, by the Ministry of Science and ICT and the Rural Growth Administration.

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