버블젯 루프 히트파이프를 이용한 근권난방 시스템에 관한 연구

Abstract

Currently horticulture farmers in Korea have great difficulty in heating during the winter due to the rise in price of agricultural materials and heating fuel costs. To solve this energy problem and improve the productivity, the development of the root-zone heating system for horticulture using a heat pipe is required. Also by distributing this system to horticulture farmers at a cheap price, the famers can cut production cost, increase competitiveness in the market and improve the quality of agricultural products by root-zone heating. The purpose of this study is development of root-zone heating system using Bubble Jet Loop Heat Pipe(BJLHP) and we try to ascertain the applicability of BJLHPat the actual horticulture farms through the field test by measuring energy consumption and crop production. First, We conducted a comparison experiment between the PE-Xa pipe and BJLHP. Second, We conducted a comparison experiment in accordance with the use of BJLHP. As a result of first comparison experiment, Root-zone heating systems using BJLHP was respond quickly to load changes and it made a constant soil temperature maintained. Also we can save about 75% energy by using BJLHP compared to PE-Xa pipe. As a result of second comparison experiment during one month in winter season, the buried BJLHP was properly operated and soil temperature is maintained at 19 ±0.5 degrees Celsius that is cucumber’s proper growth temperature. The yield has increased by 19% than the conventional greenhouse heating systems. Also fuel consumption was 15% lower than that of conventional greenhouse heating systems. From the above results, We confirmed the possibility of the horticultural root-zone heating system using BJLHP.