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Heat price

Rising prices of commodities and natural energy resources including gas and coal results in more expensive energy such as electricity or heat produced from natural resources. At the same time, other heat energy sources such as wood, peat, wood briquettes, wood pellets, and others are following the market prices. As a result, we are facing increasing demand for cheaper heating energy which would be less dependent on volatility of energy prices. Naturally, the interest in natural renewable or unrelenting energy sources such as solar, wind, geothermal heat and biofuels is rapidly growing.

New energy technologies are focused on more efficient fuel utilization, while more efficient methods of heating the search.

A special place for new and advanced technologies in the field took a heat pump that uses ground water geothermal heat or air power.

It should be noted that the cost of fuel is very dependent on the home heat loss, which consists of a modern building a house (55-65) W/m2.

To obtain the 10 kWh of heat energy, it should be burned 1 liter of fuel oil, 1 m3 of gas, 1.58 l of liquefied gas, 2.12 kg of wood briquettes, 1.73 kg of brown coal briquettes, 2.12 kg of straw briquettes, 2.12 kg wheat, 10.2 kWh of electricity.

Heat pump heat energy generated and used to power ratio is called the efficiency (conversion) rate, which depends on the heat carrier temperature, and is (4-5) range.

So the heat pump 1 kWh of heat energy price will always be equal to 1/4- 1 / 5 1 kWh of electricity price.

It consists of 9-10 cnt per kWh of heat, at this date the cost of electricity under the tariff calculation of the two: the day-42 cnt / kWh, and the night on Saturday and Sunday-25 cnt / kWh.

Meanwhile, the day 1 kWh of thermal energy in the fuel price component of the different types of fuel are:

the wood-(8-11) cnt / kWh of coal-(7 – 10) cnt / kWh, natural gas-(16 – 18) cnt / kWh, liquefied petroleum gas-(24-26) cnt / kWh, wood pellets – (11 – 13) cnt / kWh, a centralized supply of heat-(20 – 32) cnt / kWh.

What is a heat pump?

The heat pump is the latest-technology products, has started to develop intensively in the last ten years, the concern of energy saving and its effective utilization. Heat-pump technology to help home owners save money. Uses naturally gained ground, groundwater and air in a heat-efficient hot water preparation and heating.

Geothermal heating is much more efficient than electric heating devices, as well as for heating gas and liquid fuels. Heating season, geothermal heat pumps more efficient than heat pumps air-water, because they take land, or heat, which keeps the temperature nearly uniform all throughout the year, in contrast to the weather, the heating season is considerably colder. Air heat pumps are ideal for hot water preparation at the heating season period.

Geothermal energy is a natural form of renewable energy.

Heating systems with geothermal heat pump characteristics:

Heating cost is a significant increase in the price resilient future.
Heating practically does not require maintenance.
Your home is environmentally friendly, no harmful emissions into the air.
You never lose the care of thermal energy supply problems.
You redundant chimney, the gas introduction, a room or an additional fuel storage tank for liquid fuel
You are helping to save energy resources.
You contributes to environmental sustainability.

Heat Sources

Heat pumps use renewable energy resources, and allows the low-temperature heat sources to high-temperature heat energy.

Low temperature sources can be very different. In particular, the upper layers of the heat, which akumuliuojama a warm time of year the earth and solar energy. which in our latitude is about 50 W/m2. Solar heat collected soil, surface waters, water bodies. As well as low temperature heat sources may be used in deep wells of water heating, and air temperature.

Small-energy facilities, the use of heat pumps, just from a few to several dozen meters of the temperature. Simplest case, the heat source will be buried at a depth of 1-2 m tubular manifold. Summer and winter, the temperature at a depth of a high enough and stable.

Low-temperature circuit type depends on the size of the parcel, and the required heating power.

Larger plots can be installed in horizontal panels, which consists of (1.2 – 2) m plant pipes. He needed space to be two times higher than the heated area of the building. It is important not only for the installation depth of the reservoir, but the distance between the collector channels. It must not be less than 50 cm. Otherwise, the soil pipe zone is cooled and substantially reduces the heat pump efficiency. Smaller parcels can be used to spiral collectors. It consists of about a meter in diameter involute spiral pipe. He įgilinti Kasama about 2.5 m deep trench. Thermal properties, it is close to a horizontal collector, but it requires a significantly smaller area.

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Small areas are often used for vertical collectors. They consist of vertical drilling depth of 30-100 meters. They added plonasieniai plastic or copper, to cover the layer of plastic, pipes. One meter of the reservoir allows for 30-70 W power.

Reservoir of heat conductivity is very dependent on soil properties and water content of soil. The intensive work the heat pump when the pump antifreeze escape a negative temperature, soil around the pipes can be cooled to below 0 ° C temperature. Although it does not impair the heat transfer in soil, but reduces the heat pump efficiency. The chilling effect of the soil below, where the heat pump works in cycles, as the pause time, soil atšyla. Enabling the pump at night when electricity rates lower, further increasing the system economy. Storage capacity of the system in such a case, the estimate is required. It can accumulate heat and other sources of solar-collector, the solid fuel boiler, and others. Soil manifold problems of congestion is not significant, but the system should operate in this mode, the heat pump efficiency would be the biggest factor.

Low temperature heat source can be ambient air. How much heat can be extracted from the air? Not so much, and, as compared with the water and soil air density and heat capacity are much lower. If the air mass unit, atšaldę one degree, we get 1 kJ of heat energy from the water – four times more. Very different, and density. One kilogram of air under normal conditions is about 0.8 m³ in volume, and water – only 0,001 m³. Therefore air heating systems require much more power and air flow than the systems with groud source heat exchangers. The air source heat pump is ideal for summer season for preparing hot water.

Operating principle

Heat pump with heat removed from the free environment, that is, from the land, water or air. The heat pump uses the soil, water or air naturally accumulated heat. Heat pump operating principle similar to the refrigeration machinery. The difference is that the heat pump does not remove the excess heat, but the transfer of heat from an external source to the low-temperature heating units. Removed from the energy ratio of the amount of energy required to transform the heat pump is called the transformation factor. Although the system uses electricity, the overall balance of the heat pumps can save the use of traditional energy sources for households and industry.

The heating system consists of the heat pump, low temperature heat source and high-temperature circuit. Since the system components of the proper selection of the efficiency of the system.

The heat pump is a clean installation of closed circuit filled with cooling agent and does not generate any pollutants.

In the environment of the low heat source taken the heat, the heat pump to raise the required level and transmit the dwelling house or other space heating system. According to the chosen method of home heating in the heat pump heating system can be supplied with heat in different temperature (eg heating grindiniam need +35^o C temperature range, heating radiatoriniam need to +50^o C temperature). The higher temperature is required, the pump efficiency decreases. Therefore, heat pumps underfloor heating is a priority.

Since the heat pump is based on the reverse Karny cycle, the possibility of exploiting the same device home cooling (conditioning) during summer. The cold season the heat is taken from the soil, air or water or placed in the room, as it is warming, and the warm period – the heat removed from the premises, so it atvėsinant and placed in the soil, water or air.

House heating geotermal heat pump system.

Air-water heat pump operation.

What you need to know in choosing the heat pump?

The choice of heating system you must always consult with specialists, which you explain one or other of the heating system of the advantages and disadvantages. In particular, the specialist advice necessary for the evaluation of the house of thermal losses, the heating system of choice and the required heating power.

When selecting the heat pump, it is necessary to the efficiency ratio (given the heat-power ratio as a consumer of electrical power) to the real you selected external reservoir conditions, the heating-type, control, and other programming opportunities.

If you selected the heat pump, it is advisable to house the external reservoir or borehole design and carrying out the works entrusted to professionals. Improperly designed or installed in the system reduces the efficiency of heating systems and increases in heating costs.