Hydronic Heating

Posts Tagged ‘heat transfer’

okay so im the only person behind in the class and i need this assignment to be done already. so that i can finally sketch out my floor plans!

1. When soil is placed along the side of a structure to help stop heat transfer, it is called

a. dirt insulator
b. frem
c. soil conditioner
d. berm

2. Which type of landscaping is the most efficient for solar orientation?

a. deciduous trees
b. large evergreen trees
c. large areas of low shrubbery
d. large expanses of grass

3. which material is not a good heat insulator?
a. air spaces
b. vacuum space
c. single glazing
d. wood
e. double glazing
f. styrofoam

4. On which side of a home should a greenhouse be located for efficient passive solar orientation?

a. north
b. south
c. east
d. west.

thanks if you can at least answer just one quesition!

At the Great Sand Dunes National Monument in Colorado, the visitors’ centre has a Trombe Wall. The wall is designed for passive solar energy collection. The air in the air gap is heated during the day by sunlight. This in turn heats up the masonry wall. The heat energy is then transferred to the visitors’ centre at night.

What is the method of heat transfer by which heat energy reaches the glass from the Sun?

and

How is the heat energy most likely to be transferred through the air gap? Explain your answer in terms of the density of air.

I want to purge my hydronic heating system by fast-filling it and draining it simultaneously. I need to cool my cast iron boiler so I don’t crack it and completely ruin my day. The temperature of the water main is around 40°, and I am wondering how cold the boiler has to get. I have read one manual that recommends a temperature change of no more than 40°, which would make the target temperature 80°F, but the same manual also says that this rule is sometimes changed to 20° temperature change

OK, handymen, its a 1951 American Standard Arcoliner. Whaddayathink?
Here’s that manual I found http://www.smithboiler.com/modules/news/upload/%7B27A60D51-C198-453F-BAD7-67A71B1D4176%7D_Thermal_Shock_Publication.pdf
By purge I mean purge air bubbles
The idea here is not to change the water, necessarily. The point is to use the fast fill to shoot water through the lines, hopefully driving out trapped air, which is hampering the efficiency of the heat transfer at the radiators.

To reiterate, the actual question is: In your experience, how much difference can there be between the temperature of the boiler and the temperature of incoming water before you risk cracking the cast iron?

I am thinking about installing a staple up system (PEX secured to underside of the floor) using heat transfer plates and insulation. After insulating and skirting the crawl space will this type of system work eficently in cold climates?
Also what kind of T.D. can I expect? I will have a fuel oil boiler and probably a Heat Link control system with the G.P.M. calculated. The house is two stories and 1600 sq.ft. Thanks.