Peer Reviewd Journal Articles (National) (Engg)

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Autobrinometer
(Society of Fisheries Technologists (India), 1982) Vijayabharathi, K.; Ramakrishnan, K.; Sivadas, T.K.
An instrument developed for the rapid and accurate measurement of brine concentrations during blanching without disturbing the routine blanching operation is described. The concentration is sensed by a plantinum electrode conductivity cell and displayed in a moving coil meter after conversion of the electric signals into D.C. voltage. The instrument can measure in the range 5 to 12% with an accuracy of plus or minus 1%. The errors caused mostly are those due to wide temperature variations of the brine between 95 to 102 degree C and the unknown quantities of protein.
Design of a detachable type fish drier
(Society of Fisheries Technologists (India), 1986) Pillai, S.A.; Prabhu, P.V.; Balachandran, K.K.
The paper describes the design of a detachable type fish drier which has been designed to operate on commercial scale . The drier with a raw material capacity of one tonne has been designed after effecting all improvements on the design of the existing tunnel driers available in India. The cost of one drier works out to Rs. 2,16,700/- approximately.
Design of a half ton dehydrator for fish
(Society of Fisheries Technologists(India),Cochin, 1964) Swaminath, M.
A half-ton capacity artificial dryer has been designed at the Central Institute of Fisheries Technology for drying fish like Mackerel, Sardine, White Bait etc. The dryer is a hot air recirculation type 80 K.W. thermostatically controlled beating coils are made use of for heating the air. The air is circulated by means of an axial flow pattern fan. Drying takes place at a temp. of 115 degree F. The structure of the dryer to be made of Anjili wood. The cost of one dryer comes to about Rs. 20,000/-.
Design of refrigerated sea water plant for preservation of fish
(Society of Fisheries Technologists (India), 1974) Pillai, A.S.
To study the feasibility of employing refrigerated sea water on board fishing vessels for the preservation of fish, a pilot model has been designed, the details of which are presented in this paper .
Development of a fishing log for use in trawlers
(Society of Fisheries Technologists (India), 1989) Sivadas, T.K.; Ramakrishnan, K.; Vijayabharathi, K.
The paper describes the technical and operational features of a composite equipment for simultaneous measurement of 5 important parameters, warp load, boat speed, water temperature, water salinity and air temperature pertaining to the craft, gear and the environment. The equipment is designed for continuous measurement in small and medium crafts easily without disturbance to routine fishing operations. The system operated on 9V supply, is suitable for portable operations from one vessel to another. The compact electronic meter kept in the wheel-house displays the data one by one in engineering units.
Development of a torque meter for fishing vessels
(Society of Fisheries Technologists (India), 1984) Pillai, S.A.; Thampi, S.T.
The paper describes the development of an electronic instrument to measure the torque developed on the propeller shaft of fishing vessels at various speeds of the propeller. By measuring the torque, it is possible to determine the actual power transmitted from the engine gear-box unit to the propeller so that propeller efficiency can be evaluated and the optimum size of the propeller for a specific engine and vessel can be determined.
Development of an electric trawl - I - Reaction of shrimps to low volt direct current
(Society of Fisheries Technologis(India), 1971) SreedharanNamboodiri, K.
Preliminary attempts were made to assess the effect of direct current on shrimps and to see whether the shrimp could be guided in large numbers into the fishing net by using a current of appropriate voltage without scattering them away as it happens at present. This communication is the first in the series of studies and primarily deals with laboratory equipments and experimental procedures followed
Development of an energy efficient portable convective fish dryer
(Society of Fisheries Technologists (India), 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
A portable multipurpose electrical dryer of 10 kg capacity was designed and developed for drying of fishe and other agricultural products. The dryer consists of a drying chamber with total drying area of 2.8 m2, fan, heating element and exhaust vent. The dryer was fabricated using locally sourced materials. Under ‘no-load’ conditions, the drying chamber attained highest temperature of 50±5°C within 60 min of operation. Relative humidity and velocity of drying air inside the drying chamber were observed to be 65% and 0.8 m/s respectively. The study of energy consumption pattern indicated a drying efficiency of 21.42%. A performance evaluation study of the dryer was done for sardine and the maximum drying time required for complete drying was eight hours. Results showed that the entire drying processes occurred under falling rate period. A logarithmic model fitted to the drying data very well for the specified range of drying conditions.
Drying characteristics of shrimp (Metapenaeus dobsoni) in electrical dryer
(Pantnagar Journal of Research, 2020) Delfiya, D.S. Aniesrani; Murali, S.; Alfiya, P.V.; SAMUEL, MANOJ P.
This study was conducted to investigate the drying characteristics of shrimp (Metapenaeus dobsoni) in an electrical dryer. Initial moisture content of shrimps was decreased from 73– 79% (wb) to 8 – 10% (wb) final moisture in 8 h. Drying was performed at drying air temperature and air velocity of 55±2°C and 0.8±0.04 m/s respectively, and drying parameters were recorded at 1 h interval. Drying rate was found to be reduced with drying time and drying followed the falling rate drying period. Drying characteristics curves were plotted and various drying models were fitted to describe drying kinetics of shrimps. Drying models suitability was analysed based on higher coefficient of determination value (R2), lower root mean square error and reduced chi-square values (χ2). Midilli model was selected as the best fit model with highest R2 (0.999), lowest χ2 (0.00002) and root mean square error (0.004) values. Results proved that hot air drying using electrical dryer has many advantages over sun drying like better control over drying temperature and moisture content, uniformity in drying and less drying time.
Empirical modelling of drying characteristics of elongate glassy perchlet (Chanda nama) (Hamilton, 1822) in solar hybrid dryer
(2018) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
This study was conducted to evaluate the performance of solar dryer with electrical back-up to produce quality dried Glassy perchlet (Chanda nama). Insolation of the experimental region varied from 25 to 1025 W m-2. Atmospheric temperature showed a variation between 29.5 to 34.5°C. Relative humidity outside the dryer ranged from 56 to 76.5% showing a direct relationship with temperature. Drying experiment was carried out for 10 h at drying air temperature of 60°C. Relative humidity and velocity of drying air inside the drying chamber was 68% and 0.8 m s-1 respectively. Drying conditions were maintained inside the dryer by electrical back-up. Weight loss of pre-processed C. nama during drying was measured at 1 h duration. Drying characteristic data were fitted into empirical drying models. Two-term model was found to be the best fit for the drying characteristic data under specified conditions (R2=0.998, RMSE=0.016 and χ 2=0.00027).
Encapsulation of rice bran oil in tapioca starch-soya protein isolate complex using spray drying
(Agricultural Research Communication Centre, 2016) Muraly, S.; Kar, A.; Patel, A.S.; Kumar, J.; Mohapatra, D.; Das, S.K.
Equipment for removal of sand from beach dried spratts
(1970) Chakraborty, P. K.
Sand adhering to spratts (a major item of dry fish exports from India) dried by the conventional sun-drying technique, affects adversely the export quality of the fish. A simple equipment designed and fabricated for the removal of sand from the fish is described. The equipment consists of a wire mesh drum provided with three horizontal coir brushes supported on a central shaft. The drum and the brushes rotate in opposite directions, providing the desired abrasive action for cleaning the fish. The operational conditions for attaining maximum cleaning efficiency (removal of 70-80% of the sand originally present) have been worked out.
Evolution of Agribusiness Incubation Ecosystem in NARES for promoting Agri-Entrepreneurship
(2016) Subash, S.P.; Srinivas, K.; Samuel, M.P.; Kalpana Sastry, R.
Freezer temperature monitor and alarm
(Society of Fisheries Technologists (India), 1982) Ramakrishnan, K.; Vijayabharathi, K.; Sivadas, T.K.
An electronic instrument for measuring freezer temperature in the range of +40 to -40 degree C is described. The salient features of the instrument are remote display, (digital and analogue versions with an accuracy of plus or minus 0.1 and plus or minus 0.5 degree C respectively), and provision for continuous record of temperature. Two types of sensors using thermistor and P.N. junction of transistor were used for temperature sensing.
Impulse generator for electrical fishing
(Society of Fisheries Technologists(India),Cochin, 1967) Namboodiri, K.S.
Since impulse current has been found to be more economical and more effective for conducting electrical electrical fishing, an impulse generator was designed and fabricated. The principle and description of the impulse generator are given in the paper. Eventhough it is not giving theoretical value of the impulse voltages has been found that for conducting electrical fishing it is producing necessary voltages.
In situ temperature and salinity meter
(Society of Fisheries Technologists (India), 1978) Sivadas, T.K.
Development of a portable self contained electronic meter for on the spot determination of temperature and salinity is described. Instant and remote measurements of temperature and salinity of sea and estuarine waters in the range of 25-30 C and 30-35 C for temperature with an accuracy 0.05C and 0.37o/oo and 31-37o/oo for salinity with an accuracy of 0.2o/oo and 0.05o/oo respectively are possible with the instrument. The temperature compensations of the salinity measurements are done manually with the help of temperature charts. The temperature and salinity measurements can be fed to continuous recorders
Indigenous substitutes for` lignum vitae' for making stern bearings for fishing boats
(Society of Fisheries Technologists(India),Cochin, 1969) Velu, M.; Sivadas, T.K.
Difficulties are very often encountered in selecting proper material for making stern bearings for fishing boats. Conventional materials such as white metal, bronze etc wear out too fast also causing considerable wear to the propeller shaft. Lignum vitae, a natural wood commonly used for this purpose, is not available on a commercial scale in our country. Results of trials carried out to find out suitable substitutes for Iignum-vitae from among indigenous timbers are presented in this paper.
An Instrument for Measuring the Pitch and Blade Thickness of Mineral Screw Propellers
(Central Institute of Fisheries Technology, Cochin, India, 1964) Velu, M
A simple and accurate instrument has been designed and fabricated to measure the pitch and blade thickness at various points of a marine screw propeller for arriving at a correct shape and for proper balancing of the propeller. The instrument can be utilized by pattern makers, finishing shops, boat yards, etc. With existing instruments, this measurement is very difficult and cumbersome.
An instrument for the measurement of the variations in mesh shapes of fishing nets during operation
(1971) Sivadas, T. K.
A solid state electronic portable instrument developed for the measurement of the variations in the dimensions of the meshes of fishing nets during operation is described. The instrument consists essentially of an inductive linear transducer and an indicating meter kept on board the vessel, both being connected by electric cable. The accuracy of measurement is ±2 mm.
Instrumentation in fishing gear research
(1970) Sivadas, T. K.

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