Energy Management at Home

 

blog7Here are Heat pumps are very efficient heating and cooling systems and can significantly reduce your energy costs. However, there is little point in investing in an efficient heating system if your home is losing heat through poorly insulated walls, ceilings, windows and doors, and by air leakage through cracks and holes.

In many cases, it makes good sense to reduce air leakage and upgrade thermal insulation levels before buying or upgrading your heating system. A number of publications explaining how to do this are available from Natural

 

Summer Cooling May Add to Energy Bills

Heat pumps supply heat to the house in the winter and cool the house in the summer. They require electricity to operate. If you add a heat pump to your heating system or convert from another fuel to a heat pump, and your old system was not equipped with central air conditioning, you may find that your electricity bills will be higher than before.

 

 

Air-Source Heat & Cool cycle?

An air-source heat pump has three cycles: the heating cycle, the cooling cycle and the defrost cycle.

 

THE HEATING CYCLE
THE COOLING CYCLE
During the heating cycle, heat is taken from outdoor air and “pumped” indoors.

  • First, the liquid refrigerant passes through the expansion device, changing to a low-pressure
    liquid/vapour mixture. It then goes to the outdoor coil, which acts as the evaporator coil.
    The liquid refrigerant absorbs heat from the outdoor air and boils, becoming a low-temperature vapour.
  • This vapour passes through the reversing valve to the accumulator, which collects any remaining liquid before the vapour enters the compressor. The vapour is then compressed,
    reducing its volume and causing it to heat up.
  • Finally, the reversing valve sends the gas, which is now hot, to the indoor coil, which is the condenser. The heat from the hot gas is transferred to the indoor air, causing the refrigerant to condense into a liquid. This liquid returns to the expansion device and the cycle is repeated. The indoor coil is located in the ductwork, close to the furnace. The ability of the heat pump to transfer heat from the outside air to the house depends on the outdoor temperature.

As this temperature drops, the ability of the heat pump to absorb heat also drops. At the outdoor ambient balance point temperature, the heat pump’s heating capacity is equal to the heat loss of the house. Below this outdoor ambient temperature, the heat pump can supply only part of the heat required to keep the living space comfortable, and supplementary heat is required. When the heat pump is operating in the heating mode without any supplementary heat, the air leaving it will be cooler than air heated by a normal furnace. Furnaces generally deliver air to the living space at between 55°C and 60°C. Heat pumps provide air in larger quantities at about 25°C to 45°C and tend to operate for longer periods.

The cycle described above is reversed to cool the house during the summer. The unit takes heat out of the indoor air and rejects it outside.
  • As in the heating cycle, the liquid refrigerant passes through the expansion device, changing to a low-pressure liquid/vapour mixture. It then goes to the indoor coil,which acts as the evaporator. The liquid refrigerant absorbs heat from the indoor air and boils, becoming a low-temperature vapour.
  • This vapour passes through the reversing valve to the accumulator, which collects any remaining liquid, and then to the compressor.
    The vapour is then compressed, reducing its volume and causing it to heat up.
  • Finally, the gas, which is now hot, passes through the reversing valve to the outdoor coil, which acts as the condenser. The heat from the hot gas is transferred to the outdoor air, causing the refrigerant to condense into a liquid. This liquid returns to the expansion device, and the cycle is repeated. During the cooling cycle, the heat pump also dehumidifies The indoor air. Moisture in the air passing over the indoor coil condenses on the coil’s surface and is collected in a pan at the bottom of the coil. A condensate drain connects this pan to the house drain.

 

A Revolution in Water heating technology

Air Source Heat Pump Water Heating System works with a proven high performance & power saving technology and regarded as 4th generation water heater. It is unique because, approximately 75% of total heat energy generated is absorbed from surrounding air & 25% from electricity.

Salient Features

  • 24 / 7 hot water solution and works in any type of climates.
  • Equipped with high quality, efficient compressor and evaporator.
  • Tremendous savings and payback – 75 % running savings when compared with Electric Geysers and 60 % savings against diesel fired boilers.
  • Application : Hotels, Resorts, Hostels, Hospitals, Residential, Swimming Pools, Industries…etc.,
  • Models from 50 Litres /Hr to 1500+ Litres /Hr hot water generation.
  • Easy and flexible installation and maintenance.
  • It can be hybrid with the existing mode of heating system and thus eliminates the burden of extra works and cost.

Advantages

  • Very low operating cost – 20% of an Electric Water Heater. Lower running cost than boilers (75% lower) or solar water heaters (25% lower).
  • High energy efficiency – Coefficient of performance (ratio of output power to input power) can be as high as 4.
  • Compact size and ease of installation. Can be installed in any convenient location.
  • Continuous hot water supply(24 hours) – Uninterrupted operation during night time, on rainy days and even on cold days, works in any kind of weather and all seasons.
  • Can be scaled to meet requirements from individual villas to large commercial installations.
  • Reliable and durable – Can last for years with little or no maintenance.
  • Simple Operation – Temperature and time options can be preset on the intelligent digital Controller.
  • Requires less area for Installation.
  • Durability: long lifespan with low maintenance.
  • Operates in all weather conditions.
  • High pressure / low pressure protection.
  • Antifreeze protection.
  • Equipped with fully automatic and intelligent Micro processor controller and needs no human attendance once commissioned.
  • By product – cold air and can be ducted and in turn will reduce air conditioning bills to some extent.

 

 

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