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Anthropometric and Ergonomic Study of a Diaphragm Pump

M. A. Baqui
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. M. Haq
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. M. Rahman
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. A. Zami
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. A. K. Miah
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. T. Islam
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

M. S. Islam
FMPHT Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

A study was conducted to determine anthropometric and ergonomic characteristics of a BRRI diaphragm pump at the Bangladesh Rice Research Institute (BRRI) from 1987 to 1989. The pump was operated by nine male operators selected from different weight and age groups operated at heads ranging from 1.25 to 3.35 meter. The pump discharge varied from 120 to 250 l/min. The total energy expenditure rate varied from 2.70 to 2.72 (kcal/min) and the pulse rates of the operators ranged from 92 - 105 (beat/ruin). The pump efficiency was 32% at 2.75m head. The energy expenditure and pulse rate fell under light load according to Passmore and Darnin (2.5 - 5.0 kcal/min.). The study indicated that the diaphragm pump was anthropometric ally and ergonomically acceptable for surface water pumping.

Keywords: Anthhropometric, Ergonomic, Diaphragm pump

Location: BRRI, Gazipur

Start Date: 00-00-1987

End Date: 00-00-1989

Program Area: Farm Mechanization

Commodity: Pump

Objectives:

i) To determine the energy expenditure of the operators in operating the pump at different operating heads

ii) To investigate and recognize overall physical strains on muscles, joints and heart of the operators

iii) To classify the work load into light, moderate and heavy as described by the physiologist.

Methodology:

Nine male operators were selected for the experiment. They were examined by a physician for their physical fitness. The operators were properly trained to operate the pump prior to start of the experiment. The operators were arranged in three weight groups such as: Group A (40-50 kg), Group B (51-55 kg) and Group C (56-61 kg).The average resting energy of the above groups were found to be 0.29, 0.43, and 0.28 kcal/rnin, where as the average pulse rate were 70, 72 and 78 beat/min. respectively. The experiment was conducted at l.25, 2.15 and 3.35m heads taking 3 operators from each weight group. The experiment was started at 8:30 a.m. and continued upto 1: 15 p.m. on each working day. The data were recorded at 0.00, 0.25, 0.50, l.OO, 2.00, 2.25, 2.50, 3.50, 4.50 and 4.75 hours of operation. Data on energy expenditure (kcal/min), pulse rate (beat/ruin), expired air volume (l/min)were collected. A Respirometer attached to a dry gas meter was tightly fitted on the face of the operator with the help of a gas mask to collect and to record expired air volume. The sample of expired air was collected into a polyethylene bag to determine the percentage of 0₂ or C0₂ content. Bacharach Fyrite gas analyser was used for determining the percentage of O₂ or CO₂ of the expired air. The method involved chemical absorption of 0₂ and C0₂ of the expired air by the reagents named chromous chloride and the potassium hydroxide (dyed red) respectively.

Source of Information: Bangladesh Rice J. 3(1&2): 107-112, 1992

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The pump discharge varied from 120 to 250 l/min. The total energy expenditure rate varied from 2.70 to 2.72 (kcal/min) and the pulse rates of the operators ranged from 92 - 105 (beat/ruin). The pump efficiency was 32% at 2.75m head. The energy expenditure and pulse rate fell under light load according to Passmore and Darnin (2.5 - 5.0 kcal/min.). The study indicated that the diaphragm pump was anthropometrically and ergonomically acceptable for surface water pumping.

Knowledge Management: Journal