Presentation on theme: "Where did the word plumbing come from? A) A man with paints hanging down and his crack showing B) A Roman C) A Greek D) The Plumb Bob."— Presentation transcript:
Where did the word plumbing come from? A) A man with paints hanging down and his crack showing B) A Roman C) A Greek D) The Plumb Bob
Latin word for lead is plumbum, from which we derive the words plumber and plumbing. Plumbing refers to the specific water and sewage devices and systems of a building, while water and sewage systems refer to the systems that supply a group of buildings or geographic area, such as a city.
Some of the best preserved evidence of ancient plumbing, however, was found in the excavations of Pompeii and Herculaneum. In 79 AD, a volcano known as Mount Vesuvius experienced a massive eruption, burying the cities of Pompeii and Herculaneum under a thick layer of lava and ash.
The Romans were not the only people in the ancient world to have excellent plumbing by the standards of the day. King Minos of Crete has a primitive flushing water closet in 1700 BC. The kings of Crete were well known for their extravagant baths with hot and cold running water.
Which criterion used to assess your work as a professional has the greatest potential to increase your firms net profit? A.Having a project which is LEED certified B.On time, on budget project C.Lowering the clients energy costs D. Improving employee productivity E. Meeting/exceeding client expectations
What is the first step in designing a high- performance building? A.Identify synergies B.Select the correct HVAC system C. Design around human comfort D. Find the design Criteria of the system needed per ASHRAE Standard 55 E.Reduce the load
First I start off as water vapor
Inside temp Out design temp RH = 40% inside RH = 20% outside 57 0 = Saturation Temperature
Wall CavityR Value Inside Air Film0.68 5/8" Gyp.Bd.0.56 Insulation 619 5/8" Exterior Gyp.Bd /2" Air Space.62 4 Brick.68 Outside Air Film0.17 Total22.27
Formula for Temperature at Assembly Parts Inside Temp. – (( R value / Total R )x Δ T)
Inside temp out design temp – (-4 0 ) = 76 0 Total R value = Inside Air Film0.68 Temperature at surface of inside wall ((.68 / 22.27) x 76 0 )) =
Inside temp out design temp – (-4 0 ) = 76 0 Total R value = /8" Gyp.Bd.=.56 Temperature at surface of inside wall ((.56 / 22.27) x 76 0 ) =
Remember … = Saturation Temperature! If there is any moisture in the wall, where will it condense and where would it freeze?
Inside temp out design temp – (-4 0 ) = 76 0 Total R value = so at 57 0 where is that in relationship to the water vapor condensing within the wall? (X / 22.27) x 76 0 ) = 57 0
X = 4.39 What is 4.39? Batt insulation is then k = 3.45 per inch So 4.39 is about 1 -1/4 into the batt insulation and that is where the temperature is
More importantly, that is where the water vapor will condense and become water at about 1-1/4 into the wall when the outside temperature is -4 0
Inside temp out design temp Temperature at surface of inside wall ((X/ 22.27) x 76 0 ) = 32 0 Same math as before (X / 22.27) x 76 0 ) = 32 0 (72 0 – 32 0 ) = (X/22.27 x 76 0 ) 40 0 = (X/22.27 x 76 0 ) 40 0 / 76 0 = X/ = X/22.27
X = ((11.71/ 22.27) x 76 0 ) = 32 0 So if R-19 has a k value of 3.45 per inch, water will freeze at about 3 into the insulation.
Once the water condenses in the wall or ceiling we have problems!!!!!!!!!!! Much Like……
this little cute creature becomes…..
If the water could continue its journey and escape outside the backside of the brick to the cold minus -4 0 outside temperature, the following formula substantiates that assertion ((22.27/ 22.27) x 76 0 ) = - 4 0
Positive Pressure Where within the building, and what time of the year would we design positive spaces. Make sure we do not have positive spaces on outside walls in the winter months!