Envision Engineering & Skill Development

Envision Engineering & Skill Development Envision Engineering is an institution which acts for developing technical skills. Planning for future technological development and challenges.

11/07/2026

The 400 TR screw-type water-cooled chiller condenser was serviced by carrying out a complete descaling process to remove scale, mineral deposits, and other contaminants from the condenser tubes, ensuring improved heat transfer efficiency and system performance. Minor servicing was also performed, including inspection and tightening of connections, cleaning of strainers, checking for leaks, inspecting the condenser water flow, and verifying the overall condition of the condenser components. After completion of the maintenance work, the condenser was tested to confirm proper operation and efficient performance.

"Continuous revision of knowledge and skills development is an essential professional tool for enhancing performance and...
06/06/2026

"Continuous revision of knowledge and skills development is an essential professional tool for enhancing performance and advancing career opportunities."

RO Membranes and Module TypesA. Spiral Wound (the industry standard) • Most common in desalination and industrial plant...
20/11/2025

RO Membranes and Module Types
A. Spiral Wound (the industry standard)
• Most common in desalination and industrial plants.
• Compact, efficient, and easy to replace.
• Limitation: prone to fouling with high solids or viscous feed.

B. Hollow Fiber (the “fine filter”)
• Excellent for low-turbidity feeds.
• Offers high surface area in small volume.
• However, fragile and sensitive to pressure shocks.

C. Tubular (the fouling fighter)
• Designed for high-solid or oily wastewater.
• Easy to clean (CIP friendly).
• But larger footprint and higher energy use.

D. Plate-and-Frame (The flexible option)
• Ideal for small systems or testing setups.
• Allows easy membrane replacement and inspection.
• Not suitable for large-scale operations.








19/11/2025

Probable research fields in thermofluid include renewable energy technologies (such as fuel cells, solar, and wind power), aerospace and automotive applications (including engine design and aerodynamics), and micro- and nano-scale systems (like microfluidics for bio-medical applications). Other areas involve biofluids, combustion, heat transfer in buildings, and advanced computational modeling.

Energy and Sustainability

Renewable energy systems: Researching and designing technologies for solar, wind, and wave energy capture, as well as investigating hydrogen production and storage.

Energy conversion: Developing and optimizing fuel cells, batteries, and electrolysis systems for green energy.

Sustainable power: Creating smart grid technologies to improve the efficiency of energy storage and delivery.

Energy efficiency: Improving energy efficiency in buildings, industrial processes, and cooling systems for electronics and data centers.

Aerospace and Automotive

Aerodynamics: Researching areas like aerodynamic shape optimization and hypersonic flows.

Engines and propulsion: Improving air-breathing engines, understanding combustion processes, and developing advanced cooling techniques.

Vehicle efficiency: Analyzing thermal systems in automotive applications and improving designs for fuel efficiency.

Advanced and Micro-scale Systems

Micro- and nano-fluidics: Investigating fluid behavior at the micro- and nano-scale for applications in areas like medicine and materials science.

Biofluidics: Using computational fluid dynamics to study biological systems, such as cardiovascular flows and colloidal flows.

Combustion and reacting flows: Developing chemical models, using laser diagnostics, and studying soot formation in reacting flows.

Other Research Areas

Advanced computational methods: Developing new computational and numerical methods for simulating complex thermofluid phenomena.

Experimental techniques: Advancing measurement and diagnostic techniques for studying fluid and thermal systems.

Heat and mass transfer: Studying fundamental heat transfer mechanisms, with applications in manufacturing, and exploring phase change for cooling and energy storage.

18/11/2025

A screw type compressor shows over-temperature primarily due to poor cooling caused by inadequate ventilation, high ambient temperatures, or clogged oil/air filters. Other reasons include insufficient or incorrect oil levels/viscosity, a malfunctioning thermal valve, or a faulty aftercooler.

18/11/2025

Cooling and ventilation issues

Poor ventilation: The compressor is in a space with inadequate airflow, causing hot air to recirculate instead of being exhausted.

High ambient temperature: The surrounding air is too hot for the compressor's cooling system to be effective.

Dirty or clogged aftercooler/heat exchanger: Dust and debris block the cooling fins, reducing its ability to dissipate heat.

Restricted airflow: Insufficient space around the compressor unit itself can impede proper airflow.

Oil and lubrication problems

Low oil level: There isn't enough oil to properly cool and lubricate the internal components.

Incorrect oil: Using the wrong type of oil that doesn't have the correct viscosity and heat properties can cause overheating.

Clogged oil filter: A blocked filter restricts oil flow, leading to inadequate lubrication and cooling.

Degraded oil: Oil that has broken down over time can lose its effectiveness.

Other mechanical and operational factors

Defective thermal valve: If this valve is stuck, it can prevent oil from reaching the oil cooler.

Clogged oil separator: A clogged separator can restrict oil flow.

Mechanical wear: High noise or vibration can signal internal wear that causes excess heat.

The process of air cooling through a water-soaked tube system, where hot air enters one side of a series of tubes that a...
15/11/2025

The process of air cooling through a water-soaked tube system, where hot air enters one side of a series of tubes that are continuously soaked by running water from above. As the hot air passes through the tubes, the water absorbs heat from the air, effectively cooling it. The cooled air then exits from the opposite side of the tubes, while the water, having absorbed the heat, is collected and passed through the tubes at the bottom for recirculation or disposal. This system demonstrates an efficient natural cooling method leveraging evaporative cooling principles, where heat transfer occurs between the hot air and the water-soaked surfaces, resulting in a consistent flow of cool air.

UnderstandingStrainer vs Filter - Key DifferenceExplainedIn industrial systems, power plants, and process industries, ch...
15/11/2025

Understanding

Strainer vs Filter - Key Difference

Explained

In industrial systems, power plants, and process industries, choosing between a strainer and a filter plays a crucial role in maintaining equipment reliability, ensuring process efficiency, and achieving the desired fluid quality.

1. What is a Strainer?

A strainer is a coarse filtration device designed to remove large solid particles such as rust, weld slag, or sand from a liquid or gas stream. Its primary purpose is to protect downstream equipment like pumps, valves, and heat exchangers from damage.

Key Features:

Utilizes a mesh or perforated screen (commonly stainless steel) for particles typically above 40 μm.

Low pressure drop during operation.

Easy to clean and reusable by removing or back-flushing the screen.

Common configurations: Y-type, Basket-type, and Duplex strainers.

Applications:

Installed at pipeline inlets or upstream of sensitive equipment to trap large debris and prevent mechanical wear.

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Monesware Road, Zigatola, Dhanmondi
Dhaka
1209

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+8801987582886

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