Racetrac #645 – Avondale, LA

Just started this project today (30Oct12). This will be another walk-in beer cooler from your local refrigeration experts Laponica A/C & Heating.

For those with a general idea of the local area Avondale is not far across the Huey P. Long going southbound on HWY 90. Not far after that is where Jefferson Parish has their garbage dump. FYI for those who didn’t know 🙂

Advertisements

Pizza Hut – Matthews, La

Some photos of the new Pizza Hut in Matthews, La. This pizza hut is off Hwy 1 – on the same exit as Raceland coming down Hwy 90. These photos were taken in July, 2012 so they’re a little old. Either way it’s kinda neat to see how much simpler these cooler and freezer installs have become lately. You get a bunch of panels, slap’em together and BAM you can start making pizza. Typical install takes 2-3 working days. As with any work site, completion depends on the other contractors completing their jobs. You can’t exactly be putting panels on the floor if the floor guy hasn’t done his part yet, right? Just sayin…

Sam’s Club – Covington, LA

For those interested here are a few photos from June 2012 of Laponica a/c & heating unloading a truck for the coolers at the new Sam’s Club in Covington, LA. Laponica didn’t get the entire install job, but was simply asked to help out. Fun either way… it’s not everyday you get to ride one of those fancy machines 🙂

Halloween costume for company mascot

What is HVAC and what does it mean?

Short Answer:
HVAC stands for Heating Ventilation, and Air Conditioning; it represents the technology used in climate control of indoor environments, whether it be in a residential/office building, automobile, warehouse, etc. Based upon the principles of thermodynamics, fluid mechanics, and heat transfer HVAC falls under the sub-discipline of mechanical engineering.

Longer Answer:
The meaning behind HVAC isn’t as difficult as it may sound. The definition is in the acronyms: It’s a system designed to heat, ventilate and condition the air in an enclosed environment. Contrary to popular belief “air conditioning” does not refer to cooling, but rather more general as in changing / alternating the temperature either up or down. It is as if you are conditioning the air to fit your requirements (whether it be up or down is irrelevant). It’s a more modern idea that air conditioning (A/C) entails chilling the air.

The General Idea:

The photo above actually describes the a/c unit in a car, but for educational purposes it’s a little less clustered and explains the general idea.

Any air conditioning unit circulates air using pressure and a few rules of thermodynamics within an enclosed system. The cool air felt from an a/c doesn’t actually come from the freon itself, but rather from the effects of heat transfer. When heat moves it causes a low pressure behind it which feels cool. Ever noticed how one can sometimes feel a gust of cold air blow on you when opening a refrigerator  It’s not cold air from refrigerator  but rather a combination of warm air in the room and a persons own body heat rushing into the fridge. An environment will always want to be in equilibrium, which is why you feel that gust of air even though what you are actually feeling is heating moving away from you.

The following four steps explain the general idea:

  1. The compressor increases the pressure of freon turning it from a gas into a liquid and pushes it towards the evaporator.
  2. Moving towards the evaporator excess heat is ventilated by passing through a condenser and fan.
  3. Once the liquid reaches the evaporator pressure is quickly lowered causing the freon to turn into gas. Thermodynamics demands that heat in an environment to always be in equilibrium. When a liquid turns into gas it undergoes a process called phase conversion. During this process the liquid/gas absorbs heat from it’s surrounding environment making the surrounding air cooler. A fan by the evaporator blows this cold air into the room.
  4. From the evaporator coil the freon is pushed towards the compressor where it once again turned into a liquid and the process starts over.

Some Fun History Stuff:
The process of cooling the air has been around since the early civilizations. The most notable empires to have used some type of temperature regulation are the Roman and the Persian civilizations.

Rome: Only available to the extremely wealthy, the Romans circulated water from their system of aqueducts through pipes in the wall. The circulated water cooled the buildings walls and by that manner cooled the entire home.

Persia:

The Persians used wind ventilation design called a windcatcher or Malqaf in Arabic. A building would be designed with 1 to 8 openings to catch air flow from one or more directions and releasing it causing a draft. This system does not rely on any type of cooling device, but rather relies more on ventilation and air flow to cool the building. (Javaheri)

 

Article References:
“Wikipedia.” HVAC. N.p., 10 2012. Web. 16 Oct 2012. <http://en.wikipedia.org/wiki/HVAC>.

Glass, Nick. “CNN.” Ancient ‘air-conditiong’ cools building sustainably. CNN, 08 2012. Web. 16 Oct 2012. <http://www.cnn.com/2012/02/28/world/asia/ancient-air-conditioning-architecture/index.html>.

Howard, Sawyer. “Coolers Used by Ancient Romans.”eHow – Discover the expert in you.. eHow, n. d. Web. Web. 16 Oct. 2012. <http://www.ehow.com/info_8370402_coolers-used-ancient-romans.html>.

Javaheri, Elyana. “How Ancient Persian Architecture Captured Wind Energy Underground to Green Buildings.” thisbigcity. thisbigcity.net, 20 2012. Web. 16 Oct 2012. <http://thisbigcity.net/how-ancient-persian-architecture-captured-wind-energy-underground-to-green-buildings/>.

Media References:
Image 1: A-C. N.d. Mt. Healthy Auto RepairWeb. 16 Oct 2012. <http://www.mthealthyautorepair.com/A-C.html>.

Image 2: Fellanamedlime, . Malqaf.jpg. 2010. WikipediaWeb. 16 Oct 2012. <http://en.wikipedia.org/wiki/File:Malqaf.jpg>.