Heating, ventilation, and air conditioning system is just like a necessity for maintaining a comfortable indoor environment and occupant’s safety. The HVAC system uses a significant amount of energy, it nearly consumes 50 to 60 % of total power consumption in any building and thus, offers great potential and challenges of reducing energy consumption by employing various innovative techniques. Existing and new HVAC technologies can save energy and reduce operating costs. Even proper system maintenance and well-maintained building envelope can increase your savings. The most energy-efficient HVAC system will be rated with the following scientific ratings:
- The seasonal energy efficiency ratio (SEER), is the measured ratio of cooling output, measured in British thermal units (BTS) and then divided by usage, measured in kilowatt-hours. The SEER HVAC rating uses seasonal cooling conditions to measure HVAC efficiency.
- Energy efficiency ratio (EER); it uses strict laboratory conditions for its testing instead of seasonal conditions. The higher the EER number, the more energy-efficient the HVAC system is.
- Heating seasonal performance factor (HSPF); it is the ratio for how efficient the HVAC’s heat pump is, which work to produce both hot and cool air. HSPF measures how much total space heating is necessary, using the BTU measurement divided by the total amount of electricity used by the pump in kilowatt-hours.
If you want to make your HVAC system more energy efficient then run your HVAC system strategically to avoid peak demands, regulate the amount of outside air intake to match actual occupancy levels. You can adopt a predictive maintenance strategy, even a right size HVAC according to your space is also necessary to make it efficient, you can use this simple method: the square footage, multiplied by 25, divided by 12000, minus 0.5, equals the required tons for your space. If you find all this little complex, then don’t worry you can contact us and simply take our assistance. MG cooling solution will provide you the best guidance from our engineers, we are the leading HVAC company offering you cost-effective and energy-efficient cooling solutions. Further, you can take the help of these 15 technologies that follow to reduce energy usage while improving occupant safety and indoor quality:
- Demand controlled ventilation- it combines carbon dioxide sensors with economizers to maintain appropriate air levels avoiding over ventilation, which reduces energy wastage.
- Dedicated outdoor air systems-it improves humidity control by separately conditioning outdoor makeup air from indoor return air. It reduces the load on the cooling system by removing moisture from the outside air.
- Displacement ventilation-it uses a low-velocity stream of cold, fresh air at floor level to displace stale air near the roof, improving indoor air quality. The energy-saving potential varies by building and system design as well as climate.
- Electronically commutated motors- it includes a variable-speed component that saves energy by varying HVAC blower speed to match demand.
- Energy recovery ventilation (ERV)-it captures energy from exhausted air and uses it to precondition incoming makeup air. ERVs save energy by reducing heating and cooling, the system needs to maintain comfortable indoor air levels.
- Zero-degree heat pumps-heat pumps provide energy efficiency of more than 100% because they move heat instead of creating it.
- Duct sealing/Aerosol system seal-it eliminates the leakage that causes energy wastage. Make duct sealing a part of your regular HVAC maintenance program to prevent future leakage.
- Adaptive fuzzy logic control-it improves upon conventional control approaches by allowing more flexibility in adapting to HVAC systems with a wide range of operating states.
- Desiccant dehumidification-it absorbs moisture with a liquid desiccant solution and then evaporates it using heat. By removing humidity and precooling makeup air, reducing the air conditioning load helps the system to save energy.
- Microchannel heat exchangers-they have limited HVAC applications, barriers to wider use include high initial costs, and lack of long-term performance.
- Micro-environments-it creates a virtual zone for occupant environmental control, increases savings, and increases staff comfort and productivity. It is less adopted because of high initial cost and resistance to giving up central control.
- Thermal energy storage-it provides cooling capacity by extracting heat from ice or chilled water. It makes saving possible by shifting electrical use to night-time when rates are lower.
- Chilled beam cooling-it uses natural convection and radiative heat transfer, to manage humidity it typically requires a dedicated outdoor air unit and tight envelops of building. The chilled beam system reduces fan energy usage by supplying air directly to building spaces.
- Adjustable speed drivers (ASD)-it saves energy by lowering motor speed to accommodate varying HVAC loads.
- Variable flow volume (VFV) systems-they are the ductless system that is highly flexible in design and capacity. It provides energy savings while ensuring occupant comfort by using multiple compressors and provide part-load performance and zoned temperature control.
These technologies can make HVAC more energy efficient still they are not appropriate for every situation, you can opt for these following innovative strategies to make your system efficient:
- Building architectural features.
- Establishing baseline performance indices.
- Automation and building management system.
- Variable voltage and variable frequency drives (VVVD).
- Heat recovery wheel for fresh air
- Vapour absorption machine (VAM).
- Rooftop chillers
- Geothermal system.
For optimizing system efficiency proper maintenance, cleaned HVAC equipment, and regular inspection are required. By adding some new technology and strategies with some old-fashioned attention to details, you can make the most out of your HVAC system. The steps you will take to lower energy bills may also prolong the equipment’s life.