[태양열산업 선도기업] Janghan technology

Jang Han Technology (CEO Hazard) developed a fusion heat energy supply system using PVT (solar + solar heat) composite panels and heat storage and geothermal heat pumps through a demonstration project by the Korea Institute of Energy Technology Evaluation for a total of three years from 2016 to 2019.

In particular, the effectiveness of quarterly heat storage was established in a demonstration complex using BTES (Borehole Thermal Energy Storage), a technology that uses the soil itself as a heat storage medium by inserting a heat exchanger into the ground for the first time in Korea. The BTES heat storage capacity is 15~30kWh/m³, and there is a limitation that the heat storage capacity is smaller than other quarterly heat storage methods that use water as a medium, and there is a limitation that there should be no movement of groundwater from the ground, but it is economical and the construction period is short due to simple construction.

Janghan Technology applied a low-temperature storage method by combining BTES and a heat pump. The low-temperature storage method has less heat loss compared to the high-temperature storage method, and is designed to minimize the period of stabilization of ground heat, so it is an effective quarterly heat storage method that can keep the annual heat loss rate below 15%.

If it operates efficiently through securing quarterly heat storage technology and secures economic feasibility by reducing initial installation costs, the solar industry can provide a great opportunity to develop the use of solar energy dramatically.

PVT + quarterly heat storage, optimal for smart farms

Janghan Technology has applied PVT, solar panel, geothermal heat pump and quarterly heat storage to facility horticulture since last year.

It is carrying out the’rip-type industrial technology development project’.

In the field of facility horticulture, smart farms are innovating agricultural technologies, but in terms of cooling and heating supply methods, even with the benefits of cheap agricultural electricity and duty-free oil, more than 40% of the total operating expenses are air-conditioning and heating costs, which is a burden.

An official of Janghan Technology said, “The increasing trend of facility horticulture is bound to have more and more impact on the environment and energy problems.” “The supply of solar energy facilities that can achieve increased use of renewable energy and energy savings in facility horticulture will become an important business. It is expected” he said.

BTES technology combined with PVT and solar panels is very useful in heat applications where the heating load is greater than the annual cooling load. If you use a lot of heating operation in winter without recovering the underground heat in the greenhouse, the heating operation efficiency of the heat pump may decrease due to insufficient underground heat.

However, by utilizing the BTES technology combined with PVT and solar panels, the heat pump can be operated efficiently throughout the winter because it can sufficiently recover the underground heat exhausted in winter with the solar heat obtained in the summer. In addition, the electricity produced throughout the year in PVT can make a significant contribution to increasing the energy independence of plant gardening.

Janghan Technology plans to develop technologies necessary for small-scale district cooling and heating supply such as eco-friendly energy housing complexes by combining PVT, BTES, and heat pumps.

An official of Janghan Technology said, “The concept of SAHP (Solar Assisted Heat Pumps) is currently being applied overseas, and the heat pump compensates for the irregular heat production of new and renewable energy according to daily weather, so that it can provide stable heat. It will become a technology,” he said. “In order to further resolve the imbalance between heat production and heat use, we plan to continue increasing the number of applications that can be used to store the remaining energy by combining BTES and utilize it when necessary.