26/07/2022
Fan pad cooling system in polyhouse
Polyhouse Construction :
The Polyhouse is made up of Galvanized Iron pipes and it is covered with polythene sheet. On one side of the polyhouse there is a honeycomb structure and on opposite side two fan of 1.1kW are placed.
Size :
Area = 28 m × 16.12 m = 451.36 sq. m ( i.e. 4858.40 sq. feet)
Working :
In polyhouse usually evaporative cooling is done. In which the heat in the air evaporates the water from plants and other wetted surfaces. For cooling of pads water is delivered through distribution pipes. The air is drawn into the polyhouse through wet pads and by axial fans which are placed on sidewall remove the hot air and cools the polyhouse. The inside temperature should be 10-12°C less than outside temperature.
27/07/2022
For upcoming exhibition three developed projects are allotted for explaining.
1.Rice De-husking Machine
2.Vibro Thermal Disinfector
3.Manual Hydraulic Oil Press
28/07/2022
Collectes detailed information of Rice De-husking Machine, Vibro-Thermal Disinfestor amd Hydraulic oil press from Mr. Kulkarni. Cleaned out the Techno. park where the projects are going to place for the exhibition. Placed all three projects at their respective places.
Introduction :
Vibro-Thermal Disinfestor is a simple electricity operated device for disinfestations of food grains. Insect infestation on stored grains and pulses in a major concern. It causes major losses in quantity and degrades the quality of the food grains. Insects in all their development stage are susceptible to killing by heat when exposed to temperature of 55 to 60°C for 30 mins. The treatment has no effect on germination of seeds as well as the system is simple and can be fabricated without much capital investment.
Specifications :
Capacity is 40 kg/hr
Electric consumption is 1kW/hr
Applications :
Vibro-Thermal Disinfestor is useful for:
Farmers, Farmers Co-operatives, Retail Marketing, etc.
Manual Hydraulic Oil Press
Introduction :
It is low cost oil extraction machine from which we can extract oil from groundnuts, sesame, castor, linseed, neem, etc at our home. It works on hydraulic press in which we have to apply pressure by pressing the handle at certain pressure. Due to pressure the oil from seed come out and the seed remain as it is but with less oil. From 1kg of groundnut we can extract 300 to 350 ml oil.
29/07/2022
Day 1 of the exhibition. Today local primary schools, high schools and villagers of Pabal visited the exhibition.
30/07/2022
Day 2 of the exhibition.Today students of different primary schools, high schools and colleges of Pune visited the exhibition.
31/07/2022
Holiday
1/08/2022
Studied the working and installation of the float switch in the water tank of the polyhouse.
Introduction :
A float switch detects the level of liquid in a tank or container. It floats on top of the liquid surface and acts as a mechanical switch as the liquid level goes up or down.
Working :
As the liquid surface goes up or down, it moves vertically with the liquid level. Depending on the counterweight and pre-set trigger, the switch opens or closes allowing an electric current through it to the connected device.
2/08/2022
Firstly dismantled the float switch with the help of cutting blade and screw driver. Checked the continuity of the float switch by using multimeter. The float switch found faulty so we are going to buy a new float switch.
Measured temperature of the polyhouse.
3/08/2022
Edited pending blogs. Helped in workshop for making shed net for black soldier flies.
4/08/2022
Completed the remaining work of the shed-net for black soldier flies. Attached zip line to it.
Packed 40 bags of culture mixture of 500gm.
Measured temperature and humidity of the polyhouse by using Humidity meter and air flow rate of the fans with the help of Anemometer.
5/08/2022
Edited daily blogs. Collected information about hand tools and made document file of it. Discussed about the work that we have to do in upcoming weeks.
6/08/2022
There was a discussion session about ownership. Made a list of questions that we are going to ask during the survey. Made a Excel file of the data of polyhouse collected in last 2 days.
7/08/2022
Holiday
8/08/2022
Studied about the pipeline system of the polyhouse.
Conducted survey of agricultural hand tools at Ghodekar Vasti and Kokan Mala.
9/08/2022
There was a discussion session about Energy cycle and Nitrogen cycle.
10/08/2022
Repaired the broke pipeline. Firstly we dig the pipeline which to be repaired.
Then cut the broken pipeline with the help of hecksaw blade.
11/08/2022
Holiday
12/08/2022
Installed a new float switch in the water tank of the polyhouse.
13/08/2022
Holiday
14/08/2022
Done tree plantation.
15/08/2022
Hpliday
16/08/2022
Supplied water from the farm pond to the filtration system of the polyhouse.
Measured the incoming pressure of water supply at the inlet of the sand filter. It was about 0.5 kg/ sq. cm
17/08/2022
Attended weekly review.
18/08/2022
Holiday
19/08/2022
Edited pending blogs.
21/08/2022
Holiday
22/08/2022
Attended review.
Conducted Agricultural survey at Ganesh Nagar.
23/08/2022
Measured water pressure of sand flter by stopping the flow of water.
It was about 2.3 kg/ sq. cm
Purchased a new saddle piece to attach a pressure gauge at the outlet of the screen filter.
Conducted agricultural survey at Jadhav Vasti.
24/08/2022
Attached a new saddle piece in the pipeline of the polyhouse where we had to measure the pressure of water at the outlet of the screen filter.
Rejoined the loosen T-joint.
Measured the water pressure at the inlet of sand filter and at outlet of screen filter.
It was about 2.8 kg/ sq. cm and 2 kg/sq. cm respectively.
25/06/2022
Conducted agricultural survey at Chaudhari Vasti.
Attended PPT presentation.
26/08/2022
Conducted agricultural survey at Thitewadi.
Attended PPT presentation.
27/08/2022
Attended PPT presentation.
29/08/2022 to 8/09/2022
Holiday
10/09/2022
There was a discussion session about theory of relativity.
11/09/2022
Holiday
12/09/2022
Gathered information about mushroom farming.
Instructions for mushroom farming :
A cool and dark area is best for growing mushrooms. Make sure pests won’t be able to enter.
Prepare a growing bed.
Spread about 2 inches of dark and nutrient rich soil evenly into growing bed.
Sterilize the substrate. It can done by placing it in a pressure cooker to remove any contaminants.
Pour the substrate onto the soil.
Inoculate the substrate with mushroom spores and adjust the necessary temperature based on the mushroom species
Check for any sprouting or pinning after 3 weeks.
Temperature for mushroom farming :
After casing the temperature should be maintained for one week 23 to 25° C.
After that the temperature should be come down to 17 to 18° C.
Humidity for mushroom farming :
Mushroom need constant and high humidity to develop properly.
This requires a humidifier and a means of keeping a constant relative humidity of 80 to 90℅.
13/09/2022
Repaired broken honeycomb structure of the polyhouse.
First we measured the size of the broken structure that we had to repair.
Then we collected some jute bags to cover that structure.
Cut the jute bags into two parts and then joined two jute bags together with needle and thread.
Lastly attached it to the honeycomb structure.
14/09/2022
Measured dimensions of furrow beds for designing rough layout of fogging system.
Drawn rough layout of fogging system for polyhouse.
15/09/2022
Built a base of bricks for placing water tank inside polyhouse.
16/09/2022
Drawn fair layout of fogging system for polyhouse.
Collected quotation of material required for installation of fogging system from different plumbing shops.
17/09/2022
Attended PPT presentatuin.
Calculated pressure drop in lateral of the fogging system.
For first lateral :
ΔP = f*L/D*ρ/2*V²
where,
ΔP – pressure drop in lateral,
f – friction factor,
L – length of lateral,
D – diameter of lateral,
ρ – fluid density,
V – velocity
∴ ΔP = 0.0357*(21.1/16*10-3)*1/2*(0.41)²
= 0.1266/0.032
= 3.9562 KPa
= 0.0403 kg/cm²
For second lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(18.4/16*10-3)*1/2*(0.41)²
= 0.1104/0.032
= 3.9562 KPa
= 0.0352 kg/cm²
For third lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(17.15/16*10-3)*1/2*(0.41)²
= 0.1029/0.032
= 3.228 KPa
= 0.0328 kg/cm²
For fourth lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(19.85/16*10-3)*1/2*(0.41)²
= 0.1191/0.032
= 3.722 KPa
= 0.0380kg/cm²
For fifth lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(22.55/16*10-3)*1/2*(0.41)²
= 0.1353/0.032
= 4.228 KPa
= 0.0431 kg/cm²
18/09/2022
Holiday
19/09/2022
Attended PPT presentation.
Empty the water tank.
20/09/2022
Cleaned out polyhouse to place the water tank.
Cleaned the water tank.
Placed the water tank in ployhouse.
21/09/2022
Reconstructed Azolla’s bed.
22/09/2022
Made a list of questions for polyhouse survey.
23/09/2022
Collected quotation of 1 hp motor from different plumbing shops.
24/09/2022
Calculated pressure drop in 16mm lateral of fogging system.
velocity of water in 16 mm lateral
V = Q/A
= 0.00252/ 0.0002010
= 12.53 m/s
velocity in one lateral
V = 4.17 m/s
For first lateral :
ΔP = f*L/D*ρ/2*V²
where,
ΔP – pressure drop in lateral,
f – friction factor,
L – length of lateral,
D – diameter of lateral,
ρ – fluid density,
V – velocity
∴ ΔP = 0.0357*(16.5/16*10-3)*1/2*(04.17)²
= 10.2436/0.032
= 0.3201 KPa
= 0.03264 kg/cm²
For second lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(14/16*10-3)*1/2*(4.17)²
= 8.6915/0.032
= 0.2716 KPa
= 0.02769 kg/cm²
For third lateral :
ΔP = f*L/D*ρ/2*V²
∴ ΔP = 0.0357*(16.5/16*10-3)*1/2*(4.17)²
= 10.2436/0.032
= 0.3201 KPa
= 0.03264 kg/cm²
25/09/2022
Holiday
26/09/2022
Calculated velocity of water inside 2.5 inch PVC pipe and 16 mm lateral.
Flow rate of water in 2.5 inch pipe –
Q = 9000 LPH = 0.000252 m3/s
Cross-sectional area of pipe –
d = 0.0635 m
r = 0.03175 m
A = πr²
= 3.14*(0.03175)²
= 0.003165 m
Velocity of water in pipe –
Q = AV
∴ V = Q/A
= 0.00252/0.003165
= 0.7962 m/s
Cross-sectional area of 16 mm lateral –
d = 0.016 m
r = 0.008 m
A = πr²
= 3.14*(0.008)²
= 0.0002010 m²
Velocity of water in 16 mm lateral (3 laterals) –
Q = AV
∴ V = Q/A
= 0.00252/0.0002010
= 12.53 m/s
Therefore, velocity in each lateral
V1 = V2 = V3 = V/3
= 12.53/3
= 4.17 m/s
27/09/2022
There was a discussion session about design thinking.
28/09/2022
Calculated flow rate (discharge) and velocity drop in 16 mm lateral.
Discharge of one 4-way fogger –
30 LPH
Flow rate of water in 16 mm lateral –
Q = AV
= 0.0002010*4.17
= 0.0008382 m3/s
= 3006 LPH
Discharge at first fogger –
Q1 = Q – 30 LPH
= 3006 – 30
= 2976 LPH
= 0.0008267 m3/s
Discharge at second fogger –
Q2 = Q – 30 LPH
= 2976 – 30
= 2946 LPH
= 0.0008183 m3/s
Discharge at third fogger –
Q3 = Q – 30 LPH
= 2946 – 30
= 2916 LPH
= 0.0008100 m3/s
Discharge at fourth fogger –
Q4 = Q – 30 LPH
= 2916 – 30
= 2886 LPH
= 0.0008017 m3/s
Velocity drop in lateral when foggers are on –
V1 = A/Q1
= 0.0002010/0.0008267
= 0.243 m/s
V2 = A/Q2
= 0.0002010/0.0008183
= 0.246 m/s
V3 = A/Q3
= 0.0002010/0.0008100
= 0.248 m/s
V4 = A/Q4
= 0.0002010/0.0008017
= 0.251 m/s
Total velocity drop = V1 + V2 + V3 +V4
= 0.243 + 0.245 + 0.248 + 0.251
= 0.987 m/s
29/09/2022 to 4/10/2022
Brought the required materials for the installation of fogging system.
Made some connections of pipeline to supply water from the filtration system to the water tank.
Cut the 20 mm lateral into designed length.
Collected some required material from scrap.
Marked oit the points on 20 mm lateral where we are going to attach foggers.
Drilled 20 mm holes in mainline for the lateral.
5/10/2022
Holiday
6/10/2022 to 8/10/2022
Drilled holes in 20 mm lateral to attach fogger.
Tied metal wire in the polyhouse to give support to the lateral.
Attached fogger to the lateral.
9/10/2022
Holiday
10/10/2022 to 15/10/2022
Attached laterals to the mainline.
Tied metal wire in the polyhose to give support to the laterals.
Connected mainline to the water pump.
Made electricity connections of motor to operate foggers.
Placed humidity and temperature sensor inside BSF net.
17/10/2022 to 21/10/2022
Measured temperature of the polyhouse.
Attended weekly review.
Replaced the humidity and temperature sensor of BSF net.
Covered electricity board of polyhouse with plastic sheet.
22/10/2022 to 27/10/2022
Holiday
28/10/2022 to 29/10/2022
Measured temperature of the polyhouse.
Sprayed water on honeycomb pads.
Calculated the discharge of the outlet of mainline of the fogging system.
Made a excel sheet of readings that we collected in last two weeks.
30/10/2022
Holiday
31/10/2022
Attended technical review.
1/11/2022
We noticed a leakage in the water tank of the fogging system. So we fixed that leakage by using M-seal clay.
2/11/2022 to 4/11/2022
Measured temperature and humidity of polyhouse and BSF net.
Harvested Marigold flowers from polyhouse sold it in market.
5/11/2022
Discussed about the systems which we have to install in BSF net for maintaining humidity and temperature.
Wick hydroponic system
This system consist of a reservoir i.e. any bucket or container that can hold enough water.
Several long strips of suitable wicking material, string or rope.
Some common household choices for a wick are :
- Nylon rope
- Wool rope / strip
- Braided PU yarn
- Propylene strips
- Mop head strings
- Strips from old clothes or blankets.
100 % cotton strip is very good for absorption and evaporation of water.
100% rayon doesn’t absorb water easily, but when it does absorb water, it holds on to it for a longer time.
50% polyester – 50% nylon , this blend of fabrics is very effective at absorbing water, but very ineffective at expelling it. Therefore, it holds on to its liquid contents for a long time.
100% polyester is neither good nor bad at retaining water.
Advantages :
- Cheap and easy setup.
- Minimal maintenance required.
6/11/2022
Holiday
7/11/2022
Discussed about automation of fogger system with Mr. Dixit and PJ.
After this discussion, we decided that the foggers should turn on when inside temperature goes above 32° C and should turn off when temperature goes below 28° C.
8/11/2022
Discussed about the corrections that we have to make into the sensor of BSF net with PJ.
9/11/2022
Removed the sensor from BSF net to install new programme and to check whether both the sensors showing same temperature at same time or not.
10/11/2022
Cleaned out the polyhouse.
11/11/2022
Calibrated both sensors of BSF net to see whether they showing same temperature at same time or not. After calibrating there is still 1 to 2° C temperature difference between dry and wet bulb sensor.
12/11/2022
Helped Vaishnavi in her Biofloc project. The project is about growing fishes in a tank. We removed dead fishes from the tank.
13/11/2022
Holiday
14/11/2022
Today, we noticed that some foggers were not working due to clogging of dust inside it. So we cleaned it properly.
15/11/2022
Placed the humidity and temperature sensor in BSF net with new program and corrections.
16/11/2022
Repaired broken pipeline of farm pond.
17/11/2022
Replaced the cloth of wet bulb sensor of BSF net with cotton cloth.
18/11/2022
Went to the market for checking the availability of screen filter.
19/11/2022
Refilled Azolla’s bed with water and added new Azolla in bed.
20/11/2022
Holiday
21/11/2022
Helped Vaishnavi in her Hydroponics system. We did plantation of new plants in that system.
22/11/2022
Helped in workshop for making new shed net for black soldier flies.
23/11/2022
Brought a new screen filter from market to attach it in pipeline of the fogging system.
Done some preparations for the tour which will be held on 24th November 2022.
24/11/2022
Done project guidance for the tour.
