What is supply temperature?
The current standard supply air temperature is considered to be 55°F [12.8°C] and evolved to this temperature to allow space relative humidity in the range of 50% to 60%, while maximizing chilled water systems and chiller efficiencies.
What is the difference between supply and return air?
The supply vents in your home blow conditioned air out into your rooms. This air travels from your heating and cooling system, through your ductwork and out of the supply vents. The return vents in your home suck the air from your rooms into your return ducts and back to your heating and cooling system.
What does return temperature mean?
The return temperature is the temperature of the water in the pipe system after heat has been released into the greenhouse. The difference between inlet temperature and return temperature of the water occurs during transport through the heating system.
What temp should be coming out of vents?
The air coming out should be 14 to 20 degrees cooler than the air flowing in. Move the thermometer to a vent in each room or area of your home. If any of the vents are much colder or warmer than another, there may be a problem with the ductwork, or the distance may be too great from the blower.
How can you tell the difference between supply and return ductwork?
Supply vents are usually found high up on the walls in your home, or on the ceiling. Return Vents: These air vents suck air from the rooms in your home back into your HVAC system. They are typically larger in size than supply vents and you will not feel air blowing out of them.
How do I know if my vent is supply or return?
You can identify supply vents in your home by turning the system fan on and holding a piece of paper or your hand in front of the vent. If air blows out, this is a supply vent.
How do you tell the difference between supply and return?
What does supply air temperature mean?
Supply Air Temperature Reset is a long name for a simple strategy to cut energy costs. Cooling air at 95°F down to 65°F on a hot day requires energy, and to get the same air to 60°F or 55°F takes more energy. The colder you make it the more energy it takes.
What is a flow temperature?
The flow temperature refers to the temperature of the water in the supply (flow) pipe in a heating system or separate part of a heating system. If a heating system is directly connected to the district heating system, its temperature profile in pipe flow is set by the district heating provider.
What is constant flow variable return water temperature?
• Constant flow variable return water temperature • Bypassed chilled water mixes with return water resulting in lower chilled water return temperature to the plant. This lower return water temperature reduces the temperature differential (∆T) across the
Why is the return air temperature higher than the supply temperature?
Under normal operating conditions the return air temperature is between 0.5°C and 3°C higher than the supply temperature because the return air is carrying the heat from the container itself.
How is the supply air temperature maintained during normal operation?
During normal operation, the supply air temperature shall be maintained at set point by sequencing the chilled water valve, economizer dampers and hot water valve. The supply air temperature set point shall be reset based on outdoor air temperature as follows:
How does the supply temperature affect the efficiency of a plant?
As for CHP plants, the DH supply temperature has a great impact on efficiency, while the return temperature has some influence in certain configurations. Generally, a lowered supply temperature is always beneficial.