Post on 20-Jul-2020
Pacific Solar Radiant Inc. Santa Cruz Ca
Integrated Solar Radiant Systems
• William Shady PE –President
• Topics
– Radiant heating
– Indoor air quality
– Radiant Cooling
– Project Photos
– Questions and answers
Pacific Solar Radiant Inc. Santa Cruz Ca
The goal for our clients
“Healthy Comfort”
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating ?
Benefits
A properly designed and installed radiant panel heating system
offers many advantages over other heating methods.
1. Radiant panel heating improves comfort by increasing a
room's average surface temperature.
A large portion of our body's heat loss is by radiation to cooler
surfaces surrounding us. The cooler these surfaces are, the
faster
they pull heat from us and the more uncomfortable we feel.
Pacific Solar Radiant Inc. Santa Cruz Ca
Heat loss in humans
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
2. Radiant panel heating allows comfort at lower air
temperatures.
Most people engaged in light activity will be very
comfortable in radiantly heated rooms with air temperatures
in the mid 60°F range. If the activity level is greater, light
shop work for example, comfort is often maintained with air
temperatures in the low 60°F range.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits3. Radiant panel heating provides an almost ideal match to
human thermal comfort requirements.
The ideal temperature variation consists of slightly warmer
at foot level, around 70°F at chest level and cooler at the ceiling.
Pacific Solar Radiant Inc. Santa Cruz Ca
Human comfort levels
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
4. Radiant panel heating reduces or, in some cases,
eliminates room temperature stratification.
It improves comfort and reduces heat transfer through
the ceiling and upper portions of the wall. It also
reduces stack effect air leakage from the building.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
5. Many radiant panel heating systems are totally out of
sight.
Whether constructed with hydronic tubing, electric cables
or flat heaters, heated floors, walls and ceilings conceal
their function as heat emitters. There are usually less
constraints imposed on furniture placement.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
6. Radiant heating systems are easily zoned.
Many radiant panel heating systems, both hydronic and
electric, are designed for room-by-room zoning. This
offers energy savings by reducing temperature in
unoccupied rooms. It also allows different occupants to
adjust rooms to their own desired comfort level. And it
helps to prevent localized overheating due to solar or
other types of internal heat gain.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
7. Radiant heating systems create gentle room air circulation.
In most cases the air motion is so slow that it is not detectable by occupants. Central forced-air systems, by contrast, often create very noticeable whole-building air circulation. The latter tends to distribute dust, odors and airborne viruses throughout the entire building. Some central forced-air systems also pressurize rooms as they operate, increasing air leakage and wasting energy.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
8. Hydronic and electric distribution systems supplying radiant panels are easily and unobtrusively routed through buildings.
The small tubing, electrical cables or flat heaters supplying radiant heating panels are easily concealed within the building's structural cavities. By contrast, air ducts of equivalent heat carrying ability often require careful planning and structural alterations if they are to be totally concealed.
Pacific Solar Radiant Inc. Santa Cruz Ca
Area requirements
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
9. Radiant heat systems with high thermal mass, such as
heated concrete slabs, can respond quickly to increased
loads, and absorb passive solar gain.
Many heat delivery systems, such as forced air and
hydronic baseboard, have low thermal mass. This limits
the rate of heat output to the heating capacity of their heat
source. By contrast, a heated floor slab with its large
reservoir of heat can release a burst of heat when needed.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
10. Radiant heating systems with low thermal mass, such as
electric ceiling panels, release heat almost instantly when
turned on.
Quick heat gives an almost instantaneous improvement in
the thermal comfort of a cool room. Although the objects
and air in the room will require some time to warm, radiant
heat loss from the body is reduced within a couple of
minutes of turning on the low mass panel.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
11. Heated floors dry quickly.
Dry floors improve safety and provide much better
working conditions than wet floors. It is a tremendous
benefit in auto service garages, fire stations and other
vehicle service facilities.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
12. Many types of radiant panels are very resistant to
physical damage.
Panels encased in concrete floors are very resistant to
damage from heavy interior traffic. Likewise, heated
ceilings are not likely to be damaged by normal building
usage.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
13. Radiant heating panels can operate with virtually no
noise.
Properly designed and installed systems eliminate
expansion noise, sheet metal vibration, or velocity noises
caused by fast moving air. Attention to detail during
installation is crucial to achieving a quiet distribution
system.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
14. Low-temperature hydronic radiant panels are adaptable to
almost any type of heat source and fuel.
Low-temperature heat from solar collectors, geothermal
heat pumps or waste heat recovery systems can often be
utilized for radiant heating. Such heat is only marginally
suitable for other types of delivery systems.
Pacific Solar Radiant Inc. Santa Cruz Ca
Radiant is a
“Heat Distribution” System
heat
source
Gas
Propane
Oil
Electricity
GeothermalWood burning
Solar
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
15. Electric radiant heating panels are easily operated by
renewable sources.
Low-voltage electric heating panels may be directly
connected to solar panels or wind generators, and line
voltage electric panels on the grid may also get their power
from solar panels or wind generators.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
16. Radiant panel heating reduces energy consumption.
• Since comfort is maintained at lower air temperatures, the
heating load associated with air exchange is reduced. The
greater the heating load due to air exchange, whether by
natural leakage or forced ventilation, the greater the energy
savings.
• Easy room-by-room zoning control allows unoccupied
spaces to be reduced in temperature, reducing total heating
load.
Pacific Solar Radiant Inc. Santa Cruz Ca
Why Radiant Heating?
Benefits
• 16. Radiant panel heating reduces energy consumption.
• Eliminating the layer of warm air normally present against a ceiling's lower surface reduces conductive heat loss.
• Low water temperatures improve boiler efficiency and reduce heat loss from distribution piping in some hydronic radiant panel systems.
• The electrical energy consumption of small circulators used in hydronic radiant panel systems is usually lower than blowers in forced-air systems of similar heating capacity.
• Electric radiant panel systems are 100% efficient because all electrical losses go to heating.
Pacific Solar Radiant Inc. Santa Cruz Ca
Manifold detail
Pacific Solar Radiant Inc. Santa Cruz Ca
Radiant Cooling
Pacific Solar Radiant Inc. Santa Cruz Ca
Dew point control
Pacific Solar Radiant Inc. Santa Cruz Ca
Ceiling Radiant Panel
Pacific Solar Radiant Inc. Santa Cruz Ca
Chilled Beam Panels
Pacific Solar Radiant Inc. Santa Cruz Ca
Indoor Air Quality
Pacific Solar Radiant Inc. Santa Cruz Ca
Uponor
Pacific Solar Radiant Inc. Santa Cruz Ca
Pacific Solar Radiant Inc. Santa Cruz Ca
Pacific Solar Radiant Inc. Santa Cruz Ca
Iuliano Residence
2007 Innovation Award from the Radiant Panel Association, Hartford Connecticut.
6700 SF single story home in Soquel
• Structural slab insulated underneath complete slab and edges
• ½” Barrier Pex tied 12” on center
• 9000 feet of tubing in 13 zones
• Solar hot water system heats domestic water, radiant floors and swimming pool shell
Pacific Solar Radiant Inc. Santa Cruz Ca
Early Morning Start
Pacific Solar Radiant Inc. Santa Cruz Ca
Concrete Pour over Tubing
Pacific Solar Radiant Inc. Santa Cruz Ca
Swimming pool radiant
Pacific Solar Radiant Inc. Santa Cruz Ca
Gunnite tubing into shell
Pacific Solar Radiant Inc. Santa Cruz Ca
Finished pool
Pacific Solar Radiant Inc. Santa Cruz Ca
Mechanical System components
• Modulating boiler as primary heat source
• 80 evacuated tube solar collectors
• 200 gallons of solar hot water for space heat
• 120 gallons of preheated domestic hot water
• 120 gallons of domestic hot water by boiler
• Pool and spa heater 20 gallons heat
exchanger
Pacific Solar Radiant Inc. Santa Cruz Ca
Innovations
• Solar hot water to goes to pool in summer
when no radiant floor heating is needed
• One single pump circulates hot water to the
radiant floors using a variable speed motor
to save energy.
• Solar hot water is stored and used for
radiant floors and domestic hot water.
Pacific Solar Radiant Inc. Santa Cruz Ca
Mechanical Room
Pacific Solar Radiant Inc. Santa Cruz Ca
Solar collectors
Pacific Solar Radiant Inc. Santa Cruz Ca
Solar Collectors
Pacific Solar Radiant Inc. Santa Cruz Ca
Swimming pool radiant
Pacific Solar Radiant Inc. Santa Cruz Ca
Climate Right Systems
Pacific Solar Radiant Inc. Santa Cruz Ca
Climate Right Systems
Pacific Solar Radiant Inc. Santa Cruz Ca
Additional resources
• Radiant Panel Association
– www.radiantpanelassociation.org
• Pacific Solar Radiant Inc.
– www.pacificsolaradiant.com