Regeln » herefore, limits the engineer's options.

Just imagine your food as black and white! Or some dull colors like muddy Grey! Will you be tempted enough to eat them? Most of the people would not. Seeing is very significant for us human beings and that is a known fact since ages. Early civilizations introduced color into their food and that too very naturally. Ancient Egyptians made their food yellow with saffron. Wines were also colored in 400 B.C.E. using saffron only. Romans colored their white bread by mixing alum to the flour.

Today our food processing industry uses many types of industrial colorants Cheap Nike NFL Jerseys Wholesale , the main being- Food Dyes and Lake Food Colors. Not only food stuff ,but pharmaceutical products, cosmetics, inks, plastic food containers etc. are also colored with these artificial colors. So when you are having those colorful vitamin pills or using that lipstick, you are consuming these artificial food colors. It's not that only synthetic food colors are used in processed foods and other materials, there are many organic lake colors (organic lake pigments) too that are widely used for coloring food, thanks to the awareness about organic living! These organic lake pigments are obtained from natural sources. Some of the examples of such organic lake food colors include caramel, turmeric, beet and berry juice, paprika, saffron etc.

There is a wide range of synthetic colors too that are safe and commonly used in culinary preparations to make it more attractive and tempting for the palates. Synthetic foods are offered in highly purified form and are approved under the pure food and drug act Cheap Nike NFL Jerseys From China , making it completely safe for the users. Synthetic Food Colors are commonly used in syrups, cakes, biscuits, candies, ice creams and fruit juices among others. Archaeological evidences show the use of synthetic food color to over 3000 years ago and their popularity has only increased with the passing times.

Synthetic food make the preparations more delectable and appetizing as taste is largely influenced by the smell and appearance of food stuffs. There are many synthetic colors including Allura Red Amaranth, Black, Green, Sunset Yellow, red etc and are used to give richness to even natural fruit drinks like orange juice.

Blended colors are made by mixing two or more colors for the desired color result. These water soluble coloring agents are combined in the desired fashion to get the right color. Blended are typically made to cater to the unique needs of the customers and are manufactured in compliance with the international quality standards. Blended are used in ice creams, fruit drinks, pastries and even pharmaceutical products. Some of the examples of industrial colors include pink, chocolate brown Cheap Nike NFL Jerseys China , lemon yellow, purple and pea green - to list just a few.

HVAC design engineers face many choices throughout the planning process, perhaps few as crucial as that of fan equipment, a principal consumer of energy. This article will discuss options for improving energy efficiency when designing an HVAC system and selecting a fan.

Fan power consumption is directly proportional to system flow rate and static pressure. For theoretically perfect efficiency, the minimum power required to move air against resistance is defined as:

AHP = (Q × P) ÷ 6,356

where:
AHP = air horsepower
Q = volumetric flow rate (cubic feet per minute)
P = pressure (inches of water gauge) or resistance

Flow rates are predetermined based on space type and occupancy. Although local codes determine minimum requirements for HVAC systems, ASHRAE Handbook--HVAC Applications1 provides general design criteria for various commercial and public buildings. These criteria include air movement, room circulation, noise, and filter efficiency. Although all are important, room circulation, in air changes per hour Cheap Nike NFL Jerseys , typically determines airflow requirements. Because flow rate is driven by design criteria, a design engineer's primary means of reducing energy use is to minimize the static pressure needed to move air through a system.

Air Movement and Control Association (AMCA) International defines system pressure loss as "the sum of the static-pressure losses due to friction, shock, dissipation of velocity pressure at the system discharge, and the static-pressure differences between the entry and discharge openings of an air system. The static pressure a fan must overcome is dependent on many variables, only some of which the design engineer can control. The location of equipment often is determined by the architect and, therefore, limits the engineer's options.

Duct configuration and fittings used to connect components are large contributors to static pressure. Other sources of system pressure loss are balancing and control dampers, variable-air-volume (VAV) boxes, diffusers, louvers, coils Cheap NFL Jerseys Wholesale China , filters, and other components in an air stream. Given that velocity pressure is proportional to the square of velocity, pressure loss in most of these components is proportional to velocity squared. This makes size an important factor, as cross-sectional area dictates fluid velocity. For example, reducing air velocity throughout a system by 10 percent would result in a 20-percent reduction in system static pressure. With air power proportional to pressure, this would equate to a 20-percent reduction in energy consumption.