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트랙터 장착형 일관작업 둥근두둑 복합작업기의 적정 운용조건 선택

Selection of Proper Operating Conditions of an Integrated Tractor-Mounted Implement for Round Ridge Preparation

구영모
농업생명과학연구원 (Institute of Agriculture & Life Science, Gyeongsang National University)|2022|농업생명과학연구 (Journal of Agriculture & Life Science)|제56권 제5호|pp. 109-120

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키워드

Fuel consumption rate연료소비율로터리 작업셀 선도소규모 집약재배트랙터 복합작업기Integrated tractor implementRotary operationShell diagramSmall-scale intensive cultivation

초록

밭농업의 일관화를 위해 개발된 복합작업기의 효율적인 운영전략은 연료절감의 목표와 함께 저속 로터리작업의 품질에도 중점을 두어야 한다. 본 연구는 둥근 두둑 복합작업기의 작업품질을 유지하는 적정조건에서 동력과 연료소비를 계상하고 비교하여 집약적 밭농업에서의 효율적인 작업기운용전략을 제안하려 하였다. PTO 표준 시험성적을 이용한 Kim 모델은 임의의 부분 부하 상태에서 연료소비량(FC), 비체적 연료소비율(SVFC) 및 단위면적당 연료소비율(FCA)를 구하고 셀선도(shell diagram)를 얻을 수 있다. 따라서 개발된 복합작업기에 적용할 카테고리 1 트랙터(DK450)와카테고리 2 트랙터(PX800)를 선정하고 적정운용 조건에서의 연료소비 특성을 비교하였다. 이전 연구를 바탕으로 이론적인 목표 작업속도는3.0<SPDth<4.0km/h와 로터리 피치(p)가 35<p<47cm/rev인 범위를 적정한 작업 기준(criteria)으로 하여 운용조건을 선택하였다. 각 트랙터에서적정한 운용조건의 사례들을 비교하면 작은 트랙터(DK 450)를 사용함으로써 얻을 수 있는 연료소비 절약율은 FC가 19.4%, SVFC가 21.1% 그리고 FCA가 29.9% 정도로 평가된다.

Abstract

The efficient operating strategy of the integrated implement developed for the sequential upland farming should focus on the quality of low-speed rotary work, as well as a goal of fuel saving. This study aimed to propose an proper strategy for operating integrated implement in intensive upland farming by calculating and comparing power and fuel consumptions under optimal conditions of the round-ridge implement. The Kim model using standard PTO test results can determine the fuel consumption (FC), specific volumetric fuel consumption ratio (SVFC), and areal fuel consumption (FCA) under arbitrary partial load conditions and construct a shell diagram. Therefore, category I tractor (DK450) and category II tractor (PX800) to mount the developed integrated implement were selected and compared in their performance characteristics under proper operating conditions. Tractor performances were compared at appropriate operating criteria, such as the theoretical working speed (SPDth) ranged in 3.0<SPDth<4.0 km/h and the rotary pitch (p) ranged in 35<p<47 cm/rev according to previous studies. Comparing cases at proper operating conditions, the fuel consumption savings are 19.4% for FC, 21.1% for SVFC, and 29.9% for FCA achieved by using a small tractor (DK 450).

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