Introduction to Hydronic Heating Systems:
Overview of the basic fundamentals and operation of hydronic heating systems.
Heat Loss: The amount of heat a house loses that needs to be replaced.
Design Temperature and Heat Loss:
Heat loss varies by geographical area, determined by the design outdoor temperature.
The design temperature reflects how cold it will get for 1% of the hours in a year, influencing heat loss calculations.
Heat escapes through walls, windows, and ceilings; faster heat loss occurs when it’s colder outside.
House Structure and Insulation:
Wall Studs: Vertical frames (wood or metal) in walls; insulation is placed between studs to retain heat.
Wall studs themselves are not insulated, allowing heat to pass through more easily.
Example of a Hydronic System in a House:
House Layout: Two-story house with the boiler and equipment in the basement.
Hydronic baseboards on the first floor and radiators on the second floor, each zone has its own thermostat.
Heat Load: The amount of heat needed to replace what the house loses.
Operation of the Hydronic System:
The thermostat signals the mechanical room when the indoor temperature drops below the set point.
Heat Source: The boiler generates heat to raise the temperature to the desired level.
Circulators: Pump hot water (supply) through the piping system and return cooler water back to the boiler.
Delta T: The temperature difference between the supply and return water.
Heat Emitters: Deliver heat to living spaces, replacing lost heat and raising the indoor temperature.
System Response to Outdoor Temperature:
Colder outside temperatures require the system to deliver more heat.
Homeowners may have heating and cooling load calculations to determine the appropriate size of heating equipment.
No comments:
Post a Comment