KR-20260067551-A - Agricultural Fresnel Lens Solar-Air Heating Integrated System

Abstract

Regarding winter heating for smart farms or greenhouses, a combination of installing small heating units in multiple locations and using a large unit to heat the entire facility is currently employed. However, as crops grow inside the smart farm, air circulation changes, leading to problems such as localized heating shortages or the accumulation of moisture causing mold growth. To solve the above-mentioned problem, the present invention provides an agricultural Fresnel lens solar-air heating integrated system installed on the roof of a smart farm, comprising: a heat exchange fluid tank installed inside the roof of the smart farm; a heat exchanger and a heater provided below the heat exchange fluid tank; a circulation fan that supplies air to utilize the heat generated from the heat exchanger and the heater for heating the smart farm; a solar horizontal tracking unit provided above the heat exchange fluid tank to horizontally rotate a light-collecting racket and a carbon frame; and a solar vertical tracking unit provided between the solar horizontal tracking unit and the light-collecting racket and the carbon frame to move the light-collecting racket and the carbon frame up and down. The invention provides a technology that can reduce the internal heating load of a smart farm at a low cost by adding heating heat using solar heat collected from the roof in areas where local heating is insufficient or where mold occurs due to moisture condensation, through the configuration of the invention as described above.

Inventors

• 문병은
• 김혁주
• 선우훈

Assignees

• 국립순천대학교산학협력단

Dates

Publication Date

20260513

Application Date

20241106

Claims (4)

1. In an agricultural Fresnel lens solar-air heating integrated system installed on the roof of a smart farm, A heat exchange fluid tank installed inside the roof of a smart farm; and A heat exchanger and a heater provided at the bottom of the above-mentioned heat exchange fluid tank; and In order to use the heat generated from the above heat exchanger and heater for the smart farm heating, A circulation fan that supplies air; and A solar horizontal tracking unit provided above the heat exchange fluid tank for horizontally rotating the light-collecting racket and carbon frame; and An agricultural Fresnel lens solar-air heating integrated system characterized by having a solar horizontal tracking unit and a solar vertical tracking unit provided between the solar horizontal tracking unit and the light-collecting unit racket and carbon frame, which moves the light-collecting unit racket and carbon frame up and down.
2. In paragraph 1, An agricultural Fresnel lens solar-air heating integrated system characterized by the above-mentioned circulation fan being equipped with a pan-tilt function to enable direction change and control of the wind direction.
3. In paragraph 2, An agricultural Fresnel lens solar-air heating integrated system characterized by the above-mentioned circulation fan operating at high speed by increasing air pressure when supplying heating heat to areas with insufficient heating.
4. In paragraph 3, An agricultural Fresnel lens solar-air heating integrated system characterized by supplying electricity to the heater to generate heat and supplying heat to locations requiring additional heating inside the smart farm even at night, since the heat exchanger and heater cannot utilize concentrated heat from sunlight at night.

Description

Agricultural Fresnel Lens Solar-Air Heating Integrated System The present invention relates to a technology for concentrating sunlight and using it for heating agricultural facilities. More specifically, it relates to a technology for locally adding heating heat to areas of existing agricultural facilities where heating is insufficient. A photovoltaic system is disclosed as prior art prior to the filing of the present invention. This technology discloses a configuration in which sunlight is efficiently collected by an annular convex lens to heat a heat exchanger to a high temperature, stored in large quantities in an underground thermal storage pool using heat-resistant oil as a medium, and the stored heat is used to convert fresh water into steam for power generation or heating and cooling. Another prior art discloses a technology regarding a hot air device utilizing solar energy. This technology relates to a hot air device utilizing solar energy implemented to be used for heating a building, etc., with hot air generated by heating using solar energy. The device comprises: a glass greenhouse forming a sealed internal space to prevent wind from entering the interior; a greenhouse support frame installed along the inner surface of the glass greenhouse to maintain the shape of the glass greenhouse; a light-collecting unit installed on the upper inner side of the glass greenhouse to concentrate sunlight entering through the upper side of the glass greenhouse to a focal point located on the lower side of the glass greenhouse; a hot air exhaust pipe installed on the lower side of the glass greenhouse where the focal point is located, which discharges heated air from the glass greenhouse at the focal point; a blower installed on the lower side of the hot air exhaust pipe to draw air from the glass greenhouse through the hot air exhaust pipe; a temperature sensor installed at the focal point to measure the temperature at the focal point; a solar energy sensor installed in the glass greenhouse to measure the angle of sunlight irradiation; and a hot air control unit that controls the operation of the blower in response to the temperature value transmitted from the temperature sensor. Figure 1 is an actual photograph of the agricultural Fresnel lens solar-air heating integrated system of the present invention. Figure 2 is a photograph showing sunlight being concentrated using the agricultural Fresnel lens solar-air heating integrated system of the present invention. FIG. 3 is a perspective view illustrating the agricultural Fresnel lens solar-air heating integrated system of the present invention. Figure 4 illustrates the shape of the heat absorber of the agricultural Fresnel lens solar-air heating integrated system of the present invention. Figure 5 illustrates the concept of installing the agricultural Fresnel lens solar-air heating integrated system of the present invention on the roof of a smart farm. The effects of the present invention are explained using the drawings as follows. In winter heating for smart farms or greenhouses, a combination of installing small heating units in multiple locations and using a large unit to heat the entire facility is currently employed. However, as crops grow inside the smart farm, air circulation changes, leading to localized heating shortages or the accumulation of moisture that causes mold growth. While additional heating units are being installed to address these localized issues, installing them above ground has presented problems with inadequate air circulation. In addition, the problem of reduced farm income is also arising due to increased costs incurred from installing additional heating devices. The present invention aims to solve the above-mentioned problems by using a small solar concentrator that can be installed on the roof of a smart farm. Figure 1 is an actual photograph of the agricultural Fresnel lens solar-air heating integrated system of the present invention. To enable small and lightweight light collection for installation on the roof of a smart farm, a flat Fresnel lens is used, and the frame for fixing the Fresnel lens is constructed using pipes made of carbon fiber. The frame thus constructed maximizes light collection efficiency by moving the Fresnel lens according to the position of the sun using a solar vertical tracking unit and a solar horizontal tracking unit. The sunlight collected by the Fresnel lens absorbs heat in a heat absorber. The heat absorber is fixed to a light-collecting bracket fixed at the focal point of the Fresnel lens. The heat absorbed by the heat absorber is transferred to the heat exchange fluid provided in the heat exchange fluid tank, and is transferred into the smart farm through the heat exchanger and heater provided at the bottom of the heat exchange fluid tank, and the circulation fan provided at the bottom of the heat exchanger and heater operates, and the heated air is circulated around the heat exchanger and heater. At