You are handling lot many centrifugal pumps & is always struggling for design data which may or may not be available specially in case of vintage units its very difficult to recollect them.

Even in newer plants if you do not have all procedures in place for documents handling you might face the same problem. What to do in such a case? Boss is not ready to listen any excuse.....You know that there is something wrong which can be improved and therefore you get a good recognition.......But

Here is the answer...

Vacuum is any system of reduced
pressure, relative to local (typically atmospheric) pressure. Achieved with a pump, vacuum systems are commonly used to

• Remove excess air and its constituents.
• Remove excess reactants or unwanted byproducts.
• Reduce the boiling point.
• Dry solute material.
• Create a pressure differential for initiating transport of material

Liquid-ring and dry pumps offer the most advantages for the chemical process industries (CPI). Both of these pump types have bearings sealed off from the pumping chamber and do not require any internal lubrication because the rotors do not contact the housing. Both, when employing a coolant system, prevent the coolant from contacting the process fluid and causing contamination, and both use mechanical shaft
seals for containment

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Distillation operations have been branded as high energy users. An estimate says 3-5% of the total energy used in the United States was for distillation.

Therefore it is necessary for process engineers to have a ready check list for energy saving in distillation columns. In this post we are suggesting a list for process side. This does not include general recommendations for utilities.

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Power transmission equipment e.g. gears or couplings are the most neglected areas where nobody (including good energy auditors also) focuses for energy saving opportunities.

However, a certain approach or simple steps can improve their efficiency by at least 2% which may result in total annual cost saving in power bill by more than 6%.

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A building or room gains heat from many sources. Inside occupants, computers, copiers, machinery, and lighting all produce heat. Warm air from outside enters through open doors and windows, or as ‘leakage’ though the structure. However the biggest source of heat is solar radiation from the sun, beating down on the roof and walls, and pouring through the windows, heating internal surfaces. The sum of all these heat sources is know as the heat gain (or heat load) of the building, and is expressed either in BTU (British Thermal Units) or kW (Kilowatts). For an air conditioner to cool a room or building its output must be greater than the heat gain. It is important before purchasing an air conditioner that a heat load calculation is performed to ensure it is big enough for the intended application.

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Many of you, especially who are handling projects engineering, may be surprised when & why should I consider bypass for pumps. What is the utility for considering bypasses? Why not only relief valves are sufficient for safeguard against high pressure in the line? The list may be little longer than my expectation…. Here are few things to remember….

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GE Oil & Gas has received GE ecomagination certification for hot gas expander technology that works with a waste gas recovery system to help refineries significantly reduce their energy costs while also lowering emissions.

The hot gas expander for GE’s Power Recovery Air Train features GE’s latest technology and meets the rigid standards of ecomagination, the GE corporate initiative to address challenges such as the need for cleaner, more efficient sources of energy, reduced emissions and abundant sources of clean water.

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From an energy efficiency perspective, roof technology has not progressed substantially in hundreds of years, but that is changing with the use of active thermal mass components, reflective pigments and coatings, subventing, radiant barriers and other novel techniques being tested by a team led by Bill Miller and Jan Kosny of ORNL's Building Envelopes group. Their prototype roof and attic system works by reducing attic temperatures by about 22 degrees Fahrenheit during a typical summer afternoon and decreasing the amount of heat that gets transferred through the attic floor to the living space.

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Here is my experience based on energy audits of pumping systems in various chemical, metal, textile & petrochemical units. Design systems with lower capacity and total head. Do not assume these requirements are fixed. Calculate flow requirement based on actual mathematical nos without margins in each stage & then add 10-20% straightforward as Normal capacity of the pump. For example if process side heat load in an exchanger is based on normal flow of say 100 M3/hr then do not consider cooling water requirement for peak condition of 120 or say 140 M3/hr. Just calculate it based on normal flow of 100 M3/hr at this stage. Total head requirements can be reduced by: lowering process static gage, pressure, minimizing elevation rise from suction tank to discharge tank, reducing static elevation change by use of siphons, lowering spray nozzle velocities, lowering friction losses through use of larger pipes and low-loss fittings, and eliminating throttle valves.

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Perfect tips for the Summer!



Cooling costs can chill your budget in the peak summer months। Here are few tips for chilling out without going broke:

• Block out the sun. Using shades and blinds to block sunlight minimizes the amount of energy needed to cool your house. It's also worth noting that dark-colored exterior walls and roof tops can absorb up to 90% of the sun's radiant energy. To keep things cool, try painting your house a brighter color.

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According to Philips Lighting a standard incandescent light bulb costs around €1, and uses €15-worth of electricity a year. A low-energy one costs €5-6 and uses €3-worth. The payback on investing in a compact fluorescent bulb, therefore, is less than a year. Yet low-energy lighting makes up only 30% of Philips's sales.

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Some Facts
For those who are willing to take a look, and utilize golden opportunity for saving,

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1. In many cases you can use lower wattage bulbs and get same amount of light. Look for lumens on the bulb (CFL) & not for watts. Lumen indicates the brightness while power indicates eenrgy required to illuminate the area.
2. Always plan bulb location in such a way that the light is not hindered by any other room fixture.
3. White light is more comfortable than any other light for reading & day to day use. So should consider it in studies, drawing room etc. Other types can be considered for infrequently used areas e.g. toilet, bathroom etc.

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1. Select proper size AC based on room size, family members, wall & window area etc.
2. Keep your refrigerator & freezers filled to capacity without restricting air circulation.
3. Regularly clean the condenser parts of your refrigerator & AC both to have better efficiency without loosing energy.

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