Browse Publications Technical Papers 2019-28-0015

Implementation and Experimentation of effective clog removal method in tractors for enhanced condenser life and Air Conditioning performance during Reaper application 2019-28-0015

Implementation and Experimentation of effective clog removal method in tractors for enhanced condenser life and Air Conditioning performance during Reaper application Keywords - Tractor HVAC, Condenser clogging, Trash removal method. Research and/or Engineering Questions/Objective Tractors in the field are exposed to adverse operating conditions and are surrounded by dust and dirt. The tiny, thin and sharp broken straw and husks surround the system in reaper operation. The tractors which are equipped with air conditioning system tend to show detrimental effects in cooling performance. The compressor trips frequently by excess pressure developed in the system due to condenser clogging and hence cooling performance is reduced considerably. The air conditioning performance reduces due to the clogged condenser located on the top roof compartment of operator's cabin, which is still better design than keeping in front of radiator where clogging happens every hour and customer need to stop the tractor to clean it with specific blower. Since we designed package of condenser on the top of the roof where heavy particles won't reach easily so, condenser choking/clogging every 2 hour, this makes the operator to perform repetitive cleaning operations with specific equipment and is a time-consuming process. The present system utilizes the condenser fan operating logic to eliminate this issue and enhance overall system performance by rotating in opposite direction. Methodology The tractor equipped with A/C system is considered and operated for specified duration in the field. The issue to be resolved involved proposal to throw out the trash once the operator covers a certain distance in field. Hence, The control module is reconfigured and logically reformed to assist the condenser fan operation in reverse direction whenever a clogging percentage is higher. Experimental investigation was conducted and a reaper operation was functional in a straight path for certain duration. Once the condenser clogging is observed the operator reverses the condenser fan direction using the control in control module. Root cause analysis: - Condenser choking with thrash frequently and compressor tripping happened because of high pressure in the system due to less airflow passing through condenser and AC cooling is deteriorated during specific reaper application. Immediate Action/Proposal:- • Addition of relays and separate switch to operate the condenser fan in opposite direction and observe the functioning. • This helped to rotate the fan in opposite direction to throw the thrash out which chokes the condenser/thrash guard. After every 20 mins (1 reaper trolley get filled) customer have to switch ON the condenser service switch for just 1 min and the same have to be done for whole day. • This helps condenser to work for whole day without choking and without any tripping of compressor which resulted in good efficient cooling throughout the day. Final implementation & change: - Without any major change, 1 rotary knob deleted & 1 rocker switch added with condenser fan feature. Results It was observed to have substantial reduction in clogging percentage of the condenser fan, the time and efforts for the operator. Air conditioning performance was improved substantially, and compressor tripping won't happened due to high pressure throughout the day. Hence Customer can run the tractor with comfort and without cleaning condenser. What does the paper offer that is new in the field including in comparison to other work by the authors? The logic for de-clogging has not been implemented in tractor applications before and this has been proved out to be a beneficial concept and has shown better air conditioning performance and tractor run throughout the day with comfort. Conclusions The logic implemented shows considerable performance improvement and without any impact on major cost and component packaging.


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