HVAC Optimization

Thermal Audit

Focus Area – Cooling & Thermal Efficiency

  • Chiller Plant Optimization
  • Cooling Distribution Optimization
  • Thermal impact
  • Internal
  • External
  • AHU/FCU Efficiency
  • Air Quality
  • Humidity
  • Oxygen level

Dual Path Fresh Air Handling Units

  • Dual Path technology can reduce energy use for Heating, Ventilation and Air Conditioning (HVAC) by up to 50% per year.These standalone units can heat, cool, humidify, dehumidify, bring in fresh air to maintain indoor air quality, do heat recovery and improve energy savings by up-cycling low temperature condensate for additional cooling.
  • These Air Conditioning products treat heat and humidity separately. Heat is removed with proprietary heat exchangers and humidity with natural refrigerants that include Water, Propane, Ammonia, CO2 and Liquid Desiccants.
  • Dual Path units are ideally suited to hot and humid climates prevalent in the many of the populated areas of the Middle East, Asia and Africa.
  • Dual Path technology can be used in a wide range of buildings from: Transport, Hospitality, Institutional to large scale Public Buildings
  • Energy Savers works with the Canadian company Toro for these products.

Thermal Storage

Thermal energy storage is like a battery for a building’s air-conditioning system. It uses standard cooling equipment, plus an energy storage tank to shift all or aportion of a building’s cooling needs to off-peak, night time hours. During off-peak hours, ice is made and stored inside IceBank energy storage tanks. The stored ice is then used to cool the building occupants the next day.

The Ice Bear 30 is an intelligent, distributed ice battery for 3-20 ton commercial
air conditioning units. During off-peak hours, it stores cooling energy by freezing water in an insulated storage tank while the conventional AC provides cooling as needed. During peak hours, ice-chilled refrigerant circulates from the Ice Bear 30 to the air conditioning system, eliminating the need for energy-intensive compressors.

Ice Bear charges by making ice during off-peak hours and discharges by using the stored ice to cool buildings during peak hours. Our smart Ice Bear battery reduces peak cooling electricity by 95% for up to 6 hours a day, every day.

Benefits:-

  • Efficient: reduces peak cooling load by 95% and delivers 100% round-trip efficiency.
  • Reliable and cost-effective: designed to last 20 years, each unit only requires a one hour annual maintenance procedure. By eliminating stop-start operation during the hottest hours of the day, it also extends the AC compressor life.
  • Versatile: fully compatible with commercial rooftop and split systems from 3 to 20 Tons, and ductless units from 3 to 5 Tons.
  • Easy to install: integrates seamlessly with packaged or split HVAC units. Can be installed on the roof or ground by an Ice Energy certified local HVAC contractor.
  • Green: lowers CO2 emissions by up to 10,000 pounds per unit per year without generating anyhazardous waste.

AC Optimisation

    • This Energy Saving Measure focuses on improving the efficiency and operations of the existing HVAC equipment on any given site.
    • Substantial energy savings can be made through:
      • Using industry experts to ensure that equipment runs at its optimal level of efficiency -using the least amount of energy for the largest amount of cooling. A detailed thermal audit to determine current and future cooling load requirements enable AC plant to be scheduled, rotated and operated to their optimal levels
      • Thorough and periodic maintenance of equipment and adjustment of the equipment controls for optimum results
      • The introduction of other ESM such as replacement of existing lights, building envelope improvements, thermal de-stratification and the use of energy efficient pre-chillers to cool air intake to the optimal level.
      • Study and adjustment of behavioural use patterns – zoning of low use areas of buildings, reduction in cooling during non-work hours (nights and weekends)
      • Changes to procurement requirements that reduce the use of heat generating equipment, introduce low energy use and low heat production LEDs into, etc.

Pre-Chilling

M-Cycle Pre-Conditioning or Cooling is a proven Energy Efficiency solution, with over 2,000 installations in Americas, Europe and Far East

  • up to 65% savings on A/C
  • The proposed solution is absolutely unique, using < 710W, for 1,450cfm (2.460 m3/h) airflow, resulting in 15°C -25°C temperature reduction at same RH level
  • Allows to realize >60% OPEX reduction of A/C-related Electrical Consumption
  • M-Cycle installations provide up to 23 LEED points.
  • Can be used as standalone Cooling solution, as well as for Pre-Conditioning for Chiller Plants and Fresh Air / AHU units of District Cooling-based A/C installations
  • EER 40+ (Energy Efficiency Ratio) , ETL Listed, No chemical refrigerants
  • Very low OPEX and CAPEX Break-Even in less than 18 months (first pass estimate)
  • New, patented thermodynamic Cycle (Maitsosenko Cycle)
  • Requires very detailed site survey and analysis – not suited for all sites

Cooling Distribution

Huge amount of energy is wasted through inefficient A/C distribution:

  • We work with an industry leading European company to deliver cost and thermally efficient cooling distribution solutions.
  • Both feasible for new builds and refurbishment work

Cooling Destratification

Stratification, i.e. the iso-thermal layering of the air has been recognized as another leading root cause for HVAC and hence Energy inefficiencies

  • We are working with Airius, a leading provider of de-stratification solutions
  • These low energy yet highly efficient units can improve AC energy efficiency by 20% to 50%.

Heat Pumps

Heat pumps provide heating, cooling and sanitary hot water for residential, commercial and industrial applications. They convert ambient energy from air (aerothermal), ground (geothermal) and water (hydrothermal) but also excess heat from buildings and processes to useful heat. This conversion is done via the refrigerant cycle, which is also used in refrigerators and air conditioning systems. Heat pump technology is efficient and mature.

A heat pump system consists of a heat source, the heat pump unit and a system to distribute heating and cooling.

The heat pump works as follows: (1) a transfer fluid (refrigerant) is exposed to the energy source, where it evaporates and thus cools the source. Using a compressor (2), the refrigerant vapour is compressed and its temperature increased. In the next step (3), the high temperature – high pressure vapour – is fed into a heat exchanger where the energy is transferred to a distribution system. The vapour cools down and condenses. After the pressure is released in an expansion valve (4), the liquid is exposed to the heat source again and the cycle is closed. Heat pumps always provide heating and cooling at the same time. In the heating mode, outdoor ambient energy is the heat source and the building/process is the heat sink. In the cooling mode, the building/process is cooled down using the outside as heat sink. Highest efficiency is reached when heating and cooling is needed at the same time.

  • Heat pumps can be used in industry. The technical potential in applications such as food processing, drying, chemicals or textiles is estimated at 174 TWh

Adsorption Chiller/ Heating Technology

Adsorption chiller, any device designed to cool interior spaces through adsorption, a process that uses solid substances to attract to their surfaces molecules of gases or solutions with which they are in contact. Instead of using large amounts of electricity, the cooling process in an adsorption chiller is driven by the evaporation and condensation of water. Adsorption chillers provide an energy-efficient alternative to conventional refrigeration and air conditioning, because energy to drive the cooling system comes from water warmed by waste heat, such as exhaust or steam from industrial processes or heat directly generated from solar panels or other devices.

  • Energy Savers solution is absolutely unique, using < 700W for 16kW of cooling, resulting in 15°C -25°C temperature reduction at same RH level
  • Allows to realize >40% OPEX reduction for A/C Systems
  • While the cost per unit including piping, installation and solar thermal roof installation (using existing ducting/distribution system) is higher than a classical screw-compression chiller and associated systems, these additional costs are typically paid back in about 14 months.
  • Total payback from energy savings on the installation is generally around 24 to 26 months and the ROI over five years is expected to be over 200%.

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