Thursday, July 31, 2014

Intelligent addition to Cooling Towers resulting in huge power savings- PVC fills

PVC fill in cooling tower is perforated material has small corrugations which results in some tensions on the surface and this aids in containing the static air. This static air is responsible for keeping the water flowing from top to bottom of cooling tower for a longer period, which implies that water is cooled more. Since the cooling is more, this results in a more efficient tower.Another quality of PVC fill is that it is self- extinguishing which reduces the risk of spread in case of fire. This is a major risk for towers in an industrial set up with multiple machineries, especially in hot temperatures like in Delhi. 


As cooling tower manufacturers and design teams try to increase effectiveness of towers by playing with structure and material, the concept of fills come in. Fills are nothing but medium added in the tower which increases the contact surface and time between air and water which makes the evaporative process more effective. Let us understand why this happens- basic mechanism in a cooling tower is the heat exchange between falling water and air passing through it and this exchange is affected by 3 main factors- surface area, amount of time this interaction remains and turbulence or perforation in running water which defines how well they get mixed. 

Different materials can be used for fill by the manufacturer depending on requirement of the client as different materials offer different propositions and selection should be made considering factors like amount of heat, quality of water, horse power etc. Different clients have different needs depending on the purpose like some need to address high corrosion, high UV exposure, water clogging due to dirty water, risk of fire spread, high airborne contamination, bacteria, expensive installation due to high labor costs etc. Thus there are different materials used for fill like stainless steel, PVC etc. PVC fills are most popular given their advantages like lightweight, easy to install, good heat transfer properties etc

PVC Fills in towers need replacement and maintenance too as over the time due to usage; it leads to clogging with dirty water, risk of structure coming down due to weather- high humidity or heat etc. It is advisable to replace the fill at appropriate time as thermal performance of the tower is highly affected also making it efficient reducing the cost of operation. This reduced operating cost can be measured by reduction in fan power consumption in definite terms.


Thus PVC fills are an amazing accessory to add to the effectiveness of cooling towers without going overboard with expenses and the savings are quite attractive as a result of improved efficiency of the towers. This is shown by much lower power requirement for pumping.
 

 
 

Tuesday, July 29, 2014

Tough Competition among Cooling Tower Manufacturers in Delhi to woo clients

As heat grips Delhi, we all think of increasing need of energy efficient cooling systems for
industries, power plants, commercial buildings. There are alternatives in the market- dry heat rejection devices, air cooled or water cooled (cooling towers). The reason many go for cooling towers is that it offers cost effective air conditioning especially in regions where land or water is costly. Towers are constructed on the principle that excess heat from water to the air stream through heat rejection where water falls from top of tower, air passes through it from the sides making some of the water evaporate and rest cooled. Cool water is then collected for use in air conditioning, production plants etc. For a lay man, it is easy to imagine the cooling power of water when poured over red hot radiator as compared to cooling by cool air of the same.

Given high cost of land in Delhi, many industries like power plants, natural gas processing plants, food processing plants, petrochemical plants etc. use industrial cooling towers as preferredalternative. Even large buildings like hospitals, shopping malls, schools, offices etc. prefer cooling towers as they provide low cost HVAC (heating, ventilation and air conditioning). Thus Delhi offers a great potential market for cooling tower manufacturers and we see a great number of them flourishing in the region.

Delhi is buzzing with new shopping malls, hospitals, offices and therefore the need of cooling towers in scorching heat. This has led to competition among top 10 cooling tower manufacturers in the city and everyone is eager to get the best brand names in their umbrella. Buyers these days prefer local manufacturers rather than ship different parts and get assembled at the location. The reason is clear- it is more reliable that professionals at manufacturers’ facility assemble the cooling tower rather than local labour. Also there are advantages of local manufacturer like need of replacement parts in future or other repair work and thus local offices, industries etc. are looking for cooling towers manufactured in Delhi only. 


There are factors which help clients to trust the manufacturer and some of them include getting CTI (Cooling Technology Institute) certification and designing the towers as per IBC (International Building Code) which specifies structural requirements, installation requirements including HVAC equipment etc.  Another important aspect is that the towers designed should be of high efficiency which is defined as kilo Watt Fan of cooling tower per ton of heat rejected. There are some countries which define the minimum requirements for the same too like Kuwait but not in India. But still client would look at this factor to choose the manufacturer.


Thus there is a huge scope for coolingtowers in metropolitan city like Delhi and thus an intense competition exists. The manufacturers should focus on building high quality and efficient products to be the leader in the industry.