I run into a gym project, does anyone has any materials on gym? such as schedule, energy efficiency strategy and so on. I will be very appriciated for your help. Thank you
For the schedule, it really depends on the project you are working at I
think.
The gym I frequent uses fans in addition to the cooling, that can be a
energy efficiency strategy.
Good luck,
Dionisio
Gyms typically have metal halide or other HID lighting that remains on all day due to the long strike-off time to turn the lights back on if they?ve been turned off.
A good retrofit is to replace them with high output T-5 fluorescent fixtures at significantly lower wattage. Additionally, these are instant on and can be controlled by occupancy sensing controls for maximum savings. If the gym has skylights, you can also use bi-level or other daylighting controls.
Thanks for jogging my memory. I totally forgot about swimming pools.
If there is an adjacent or nearby air conditioned space, a heat pump water heater could be considered using the pool as a heat sink. Or a small power generation system and use the waste heat for pool heating.
Although not totally energy savings related and probably best calculated in a spreadsheet, the chemical treatment, filtration, and pumping systems should be looked at.
If part of maintaining the pool water chemistry includes the use of sodium bicarbonate, going to a CO2 injection system can be low hanging fruit with a payback in chemical usage of about 2 years or less. Chlorine pumps are generally a maintenance headache. Using a venturi type chlorine injection system can provide good maintenance savings.
Pool filters are generally of the sand filter type or diatomaceous earth type. Sand filters have high backwash requirements with a considerable amount of water, heat, and chemical being dumped to drain. Diatomaceous earth filters have high pressure drops, requiring more pumping power. In both cases, pool pumps need to be sized for worst case conditions of the filters being plugged. Perlite media filters are pretty much self-cleaning with low backwash requirements and low pressure drop, allowing the use of a VFD to vary flow rate between occupied and unoccupied periods.
Dear Aaron,
For the schedule, it really depends on the project you are working at I
think.
The gym I frequent uses fans in addition to the cooling, that can be a
energy efficiency strategy.
Good luck,
Dionisio
Gyms typically have metal halide or other HID lighting that remains on all day due to the long strike-off time to turn the lights back on if they?ve been turned off.
A good retrofit is to replace them with high output T-5 fluorescent fixtures at significantly lower wattage. Additionally, these are instant on and can be controlled by occupancy sensing controls for maximum savings. If the gym has skylights, you can also use bi-level or other daylighting controls.
Mike
Michael R. Busman, CEM
If they have a heated swimming pool or spa, make sure they have a good
insulated cover.
Robert Wichert P.Eng. LEED AP BD&C
Robert,
Thanks for jogging my memory. I totally forgot about swimming pools.
If there is an adjacent or nearby air conditioned space, a heat pump water heater could be considered using the pool as a heat sink. Or a small power generation system and use the waste heat for pool heating.
Although not totally energy savings related and probably best calculated in a spreadsheet, the chemical treatment, filtration, and pumping systems should be looked at.
If part of maintaining the pool water chemistry includes the use of sodium bicarbonate, going to a CO2 injection system can be low hanging fruit with a payback in chemical usage of about 2 years or less. Chlorine pumps are generally a maintenance headache. Using a venturi type chlorine injection system can provide good maintenance savings.
Pool filters are generally of the sand filter type or diatomaceous earth type. Sand filters have high backwash requirements with a considerable amount of water, heat, and chemical being dumped to drain. Diatomaceous earth filters have high pressure drops, requiring more pumping power. In both cases, pool pumps need to be sized for worst case conditions of the filters being plugged. Perlite media filters are pretty much self-cleaning with low backwash requirements and low pressure drop, allowing the use of a VFD to vary flow rate between occupied and unoccupied periods.
Mike Busman
VFD pumps have become a big deal hereabouts recently. EnergyPro even
installed a module to calculate pumping energy.
Robert Wichert P.Eng. LEED AP BD&C