Posts tagged evaporation

Refrigeration History Elaboration

historyDid you know that the Chinese harvested ice from rivers and lakes as early as 1.000 BC in the name of primitive refrigeration?  They even had religious ceremonies for filling and emptying ice cellars. That’s not all.  Hebrews, Greeks, and Romans placed large amounts of snow into storage pits and covered it, insulating material like grass, chaff, or branches of trees. They actually used these pits as well as snow to cool beverages, according to our recent research on behalf of your St Louis Refrigeration Maintenance near Sunset Hills MO. “Egyptians and ancient people of India would moisten the outside of the jars and the resulting evaporation would cool the water that was inside of the jars. The first group of people to use cold storage to preserve food was Persians. They invented Yakhchal, a type of an ice pit.”  The history of refrigeration is a very interesting subject with vast effects from one end of the world to the other.

According to our studies done on behalf of your St Louis Refrigeration Sales, we learned that ice harvesting was the only method of food refrigeration for centuries.  In fact, in 18th century England, servants collected ice in the winter and were putting it into icehouses. “Icehouses were places where the sheets of ice were packed in salt, wrapped in flannel, and stored underground to keep them frozen until summer. In the 19th century, the first ice boxes started appearing in England. At that time, the first commercial ice started appearing with spreading of ice-storehouses and iceboxes. Frederic Tudor started harvesting ice in New England and shipping it to the Caribbean islands and to the southern states. At first he had ice wastage of 66% but with better insulated ships he reduced the waste to 8%. He expanded ice market and by the early 1830s ice became a mass-market commodity.”

We hope you have enjoyed this lesson on the history of refrigeration brought to you by your St Louis Refrigeration sales and repair near Sunset Hills.


HVAC History Facts

typewriterWriting here on behalf of your HVAC service and sales company near Maryland Heights, I like to cover topics of interest that can helpful, but also sometimes just interesting and informative.  So, today, we will be going over some good old fashioned history.  The history of HVAC, to be exact, and we will likely be discussing parts of it over the course of the next several posts.  In 1758, according to your Bridgeton MO HVAC sales people, Benjamin Franklin and John Hadley discovered that all liquid evaporation had a cooling effect.  Using alcohol, and other volatile liquids, they determined that these things could evaporate faster than water and could actually cool down an object enough to freeze water.

In 1820, according to your HVAC Maintenance near Maryland Heights, Michael Faraday worked on and discovered the same thing when he compressed and liquefied ammonia.  In the 1830’s sometime, Dr. John Gorrie built an ice making machine that used compression to create buckets full of ice and then blew air over them.  He did not have the finances he needed to move forward with his ideas and so all was dissolved.  Still in the 1800’s, 1881, to be exact, President Garfield was shot and naval engineers did all that they could to keep him comfortable by inventing and building a cooling box.  It was full of soaking wet cloth and blew hot air overhead, keeping cool air to the ground.  The amount of ice used was incessant and so it proved to be inefficient and President Garfield passed away.

More takes place in the 1900’s, when in 1902, “Willis Carrier invents the Apparatus for Treating Air for the Sackett-Wilhelms Lithographing and Publishing Co. in Brooklyn, N.Y. The machine blows air over cold coils to control room temperature and humidity, keeping paper from wrinkling and ink aligned. Finding that other factories want to get in on the cooling action, Carrier establishes the Carrier Air Conditioning Company of America.”  This, according to your commercial HVAC sales and service company in Bridgeton MO, marks the first actual air conditioner, though much research had been done to lead to that point.

Refrigeration is More Modern Than You Think

Rows Of Modern Fridges In A StoreDid you know the history behind refrigeration?  Well, we want to spend some time sharing what we learned today about just that!  Most of us, including those who work for the St Louis American Service Refrigeration repair near Clayton MO, could never even imagine a world without ice cream, fruit, cold beer or frozen dinners.  There was a day, before the convenience of refrigeration, when people had to go to the grocery store every single day in order to make sure they had fresh food for themselves and their family.

Here is what one famous Appliance Magazine online had to say, “Over the last 150 years or so, refrigeration’s great strides offered us ways to preserve and cool food, other substances and ourselves. Refrigeration brought distant production centers and the North American population together. It tore down the barriers of climates and seasons. And while it helped to rev up industrial processes, it became an industry itself.”

To examine closer, the impact refrigeration has had on consumers and the industry alike, you really first must understand that there exists a difference in the appliance that we use to cool food in the kitchen, both industrial and home, and the refrigeration process itself.  “Refrigeration is the process of cooling a space or substance below environmental temperature. To accomplish this, the process at first removed heat through evaporation and then later in the 1850s with vapor compression that used air and subsequently ammonia as a coolant. Refrigeration has been around since antiquity.”  The man who invented the refrigerator, Thomas Moore, did so in 1803.  Prior to that, and for centuries, people worked to preserve their food, dairy in particular, in cellars and outside window boxes.  Sometimes even under water!

Indoor Air Quality Hazards – VOCs

ndoor air pollution

Did you know that every time you use certain household or commercial products you are releasing potentially harmful compounds into the air?  These compounds are referred to by the EPA as VOCs or Volatile Organic Compounds and can be reeking havoc on your indoor air quality.  Today, the team at American Services wants to give you some facts about VOCs and also some ideas on how to eliminate them from your indoor environment.

Facts about Volatile Organic Compounds or VOCs:

  • VOCs can be found in cleaning products, paints, chemical strippers, waxes, pesticides, candles, and many other common products around your home and workplace.
  • VOCs can also come from floor coverings, furniture, electronic equipment, air fresheners, and dry-cleaned clothing.
  • The VOCs from these products are not just emitted into the air during use.  They are also releasing potentially harmful VOCs while simply being stored due to natural evaporation.  This makes the source of VOCs harder to pinpoint.

How to control and eliminate VOCs from your environment:

  • Adequate ventilation needs to be in place when using VOC-containing product.  This includes when you are painting, using cleaning products, or any other activity that could expose you to VOCs.  The best way to ventilate in these situations is by opening windows and/or using exhaust fans.
  • Read the manufacturer recommendations for all products to make sure you are properly using, storing, and getting rid of these products.  For example, many cleaning products can not be mixed with other chemicals.  If the chemicals are combined you can cause a reaction that will cause harm to the user.
  • Ask your Maryland Heights area heating and cooling technician about adding equipment to your system that will clean the pollutants out of your indoor air.  These units can help tremendously in eliminating odors from your space and can even help to control allergy issues that may be of concern.

Contact the American Services team today for a free quote!

Focus On – Cooling Towers

St Louis Commercial Cooling ServiceHave you ever wondered what a cooling tower is how it can work for providing air conditioning to your commercial property?  If so, today’s focus on cooling towers is perfect for you!  Let’s get started with a quick overview regarding the actual function of this type of unit.

According to, a cooling tower works like this, “The tower creates a stream of cold water that runs through a heat exchanger, cooling the hot condenser coils. The tower blows air through a stream of water causing some of it to evaporate, and the evaporation cools the water stream.”  It is noted that a disadvantage associated with this type of system is that water has to regularly be added to make up for evaporated liquid loss and that the efficiency of this type of unit relies heavily upon the relative humidity of the air, along with the barometric pressure.  Just a few things to think about!

The team at American Services wants you to completely understand your cooling options.  Please feel free to contact our Florissant area commercial cooling sales department to get all the details regarding the cooling tower-based systems we have to offer.  Our team can additionally help you with a full range of HVACR needs.  Our list of services includes: HVAC services like rooftop packaged units, split systems, boilers and chillers; Refrigeration units like walk-ins and reach-ins; Industrial Equipment like chillers, exhausts, and make-up air; Cooking Equipment like grills, ovens, fryers, and steamers; plus Beverage Equipment like coffee, cappuccino, soda, and frozen beverages. You can count on our team to have the knowledge needed to assist you with your purchase, perform your installation, custom-design a maintenance plan, and perform all needed repairs.  There really is no other HVACR team that can do that in St. Louis!

Evaporative Cooling; How it Works

cooling repair in MissouriAmerican Services heating and cooling installation in Edwardsville knows that evaporative cooling uses evaporated water to naturally and efficiently (energy) cool the environment. Modern technology has produced two types of evaporative coolers, direct and indirect. Direct evaporative coolers, better known as swamp coolers, operate by cooling outdoor air by passing it over water saturated padding, causing the water to evaporate into the padding. The 15-40degree Fahrenheit cooler air is then directed into the building and pushes warmer air out through windows. When direct evaporative cooling systems are used in commercial buildings they are most often roof mounted.

When operating a direct evaporative cooler, windows or vents must remain open part way
to allow warm air to escape outside, being replaced by cooled air. Unlike central air conditioning circulating the same air; evaporative coolers provide a steady stream of fresh air into the building.

Indirect evaporative coolers have a heat exchanger that prevents humidity from entering the building. Efficiency tends to be lower than that of the swamp coolers mentioned above.

Another type of evaporative cooling for commercial buildings is night sky radiant cooling. This approach works best in climates with large diurnal temperature swings, such as in the Southwestern United States.

The process begins when water is sprayed on to a low slope roof surface at night then cooled through a combination of evaporation and radiation. The water then drains to a tank in the basement or is circulated through tubing embedded in a concrete floor deck. Cooling is accomplished during daylight hours by either recycling the water that was routed to the basement tank the night before, or circulating cool water thru tubing located in the concrete floor slab.