Forum industrije toplotnih pumpi sa opisom prakti?nih iskustava upotrebe, novitetima iz razvnojnih "kuhinja", testovi toplotnih pumpi itd
www.varmerpumpsforum.comVodi? za kupovinu TP vazduh vazduh, original na švedskom autora Rick
http://www.varmepumpsforum.com/vpforum/ ... #msg257032pažnja- automatski prevod
osnovne osobine ovog tipa toplotnih pumpi
prednosti:
-jeftinije od drugih tipova
-relativno lako, brzo i jeftino se postavlja
-može da takodje i hladi objekat
-kratak period povrata investicije, obi?no 2-4 godine
-dosta ljudi se ose?a prijatnije u prostorijama usled filterskih elemenata unutrašnje jedinice što poboljšava ?isto?u vazduha
nedostaci:
-buka ventilatora kako unutrašnje tako i spoljne jedinice. Usled na?ina rada velika brzina strujanja vazduha je osnov efikasnog funkcionisanja
-ne zagreva sanitarnu toplu vodu umanjuju?i potencijalnu uštedu u tom domenu
-ako ku?a ima više prostorija i/ili je na više spratova javlja se neravnomerna raspodela temperature i time smanjen komfor
-filteri kao i spoljna jedinica zahtevaju redovno održavanje tj ?iš?enje
-loša efikasnost rada pri spoljnim temperatura nižim od -10C
- pri spoljnih -15C ve?ina ovakvih toplotnih pumpi ima COP 1,50 do 2.00
-za najhladniji klimatski period je obi?no nužan dodatni grejni sistem kao ispomo? usled pada snage TP a što može da pove?a operativne troškove
First a little about the function.
Air / air heat pump derives its energy from outside air, the outdoor unit is a fan that blows large amounts (typically about 2500 m3 / h) air through a so-called evaporator where köldmediat heated and transferred to the indoor unit.
The heated köldmediat is then cooled by the air conditioner's condenser and indoor unit which emits heat.
The control of evaporation and condensation is a relatively complicated process, and not all manufacturers have less efficient heat pumps., Especially when the outdoor temperature is low.
For the evaporation / condensation to function optimally controlled in the vast majority of air / air heat pumps for both the fan and compressor speeds - all to achieve the most optimum condition as possible for the heat pump. At temperatures below about +5 ° C to allow defrosting of outdoor unit, automatic defrost when the outdoor unit that capacity will not be too low.
The efficiency, COP, is low at temperatures below -15 degrees. Relatively large differences exist however between the manufacturers. In northern parts of the country, it is important to find a heat pump that provides both high power and high COP at low outdoor temperatures.
Read Energy Agency's test you can find here:
http://www.energiekonomerna.se/sites/en ... yndigheten% 20luftluft.pdf
The tests are not so new, but can still provide a picture of the manufacturers which have done well with their machines.
Who is air / air-conditioner is best for?
The house should have an open design so that the heat can be spread evenly.
In houses with direct electric air conditioner is one of the most interesting options, relatively good savings relative to investment.
When the air conditioner can not heat your hot water is an advantage if the household has a low hot water consumption.
You should not be so large demands for uniform temperature in all rooms, expect about 1 degree difference in room temp for each "doorway" which the heat must be transported.
Ideally, a house built on one level, thermal dissipation between ground and first floor can function quite well, but it is difficult to be installed before determining how it will work.
It is better the further south of the country you live, heat pumps operating conditions at very low temperatures (type at -15 ° C) makes the saving is not so great
Location of the inner part important
For the heat pump to operate most effectively and achieve the highest possible efficiency, it shall preferably be located centrally in the house, and not in a confined space.
Placed on such in a small hall with door openings to the adjoining rooms so there is a risk that it simply gets so hot around the heat pump that is cutting output, even if you feel it is too cold in the rest of the house, this can be remedied by increasing the desired rumsbörvärdet, but the performance is noticeably worse efficiency of the heat pump.
If you have a hallway with open plan to the adjacent room, it is often a good location, the inner part sits in a place that usually does not disturb anyone - whether drafts or "noise" from the fan will work for you!
The house with two floors, it is not unusual to place the air conditioner "in the stairs" so that it is essentially heats the ground floor, but in order to redirect the airflow so that some of the steam to the upper floor, although this type of placement is usually good for "disturbing factor"
For a successful stair-location is an advantage if the stairs are of open construction, and the unit is not placed too high, problems with too much heat upstairs could otherwise result.
Older houses often have many small rooms, and in case you have a plan that is not good from the air distribution standpoint, it may make sense to buy two smaller pumps, but a big who can not access to heat the whole house.
There are several advantages of dual heat pumps, expect a few below:
More even heat distribution.
Less need for contributions from other (more expensive) heat source when outdoor temperatures are low
During most of the year, two heat pumps go on low speed, and then gives a better COP (efficiency), which increases savings compared to a big heat pump that is in full swing.
Two heat pumps that go with low power less noisy, and should reasonably also last longer.
The outdoor unit placement
Where / how to best place the outdoor unit ...
There are many different brands of heat pumps on the market, some of them may safely be placed on wall brackets, the most practical, but some vibrates so much that it is difficult to get to an installation that is not noisy because of the vibrations propagated in a house frame .
Before you decide how to place your pump, check with others who have just the heat pump you buy, how does their position, they are disturbed or not?
When installing a heat pump on the wall brackets supplied as regular hard vibration dampers, you have problems with vibration propagates to the wall after installation, or want to guard yourself before installing it sells Värmepumpsforum the webshop extra soft vibration dampers that most customers get a major improvement , you can buy them here:
http://www.varmepumpsforum.com/catalog/ ... ucts_id=72You can read reviews here:
http://www.varmepumpsforum.com/catalog/reviews.phpIf one knows that one is sensitive to the noise one should consider the location of land stand, if you choose ground stand, I think you should spend a little dedication to a solid foothold, sure it is possible to bury some Leca concrete or sows, but best believe I am a small cast sheet is.
Tilt the pan a bit out of the foundations so that the condensate and melt water from the defrost does not seep into the crawl space, under the sole, or bottom of the basement wall.
Some form of water-pointer or container under the outdoor unit is always positive if you do not want to be charged to the foundations of an abnormal water load.
In some cases built up sewer lines to storm sewers (elvärekabel needed to keep the pipes thawed when it's below freezing outside) but this I think is a little premium ...
In which direction should the outdoor unit installed?
For maximum efficiency, the outdoor unit is placed at least 10 cm from the wall, and clean gererellt with as open as possible, turn off the heat pump behind bushes, under the stairs, or the like so impaired the flow of hot air to the evaporator, be aware that, depending on model, the heat pump sucks up to 6 kW of heat from outside air, place the outdoor unit so tight that the air circulates, it creates a microclimate next uteddelen where the air is cooled, which in turn results in a lower COP than otherwise.
Nor do I think that they will build into the outdoor unit with heat protection, etc. that can be purchased as an accessory.
An investment in the south is preferable, autumn and spring sun can contribute with the right amount of heat in the south-facing, heat that makes your heat pump offers better savings! The differences are probably not great, but you have the opportunity to choose recommends at least I am sure you select the location to the south.
The outdoor unit placement is controlled, however, often represent the most appropriate placement of the inner part is - and how long pipes you can / should take between outer and inner.
Then inside the district's placement is far more important than the outdoor unit as an investment in any weather subscribed completely OK if one takes into account the other things I mention above.
I have a hydronic heating system, do not fit the air conditioner for me?
Of course you can save money with an air / air heat pump even in houses with water-heating and built in more than one level, the fact is that air-to-air heat pump is probably the fastest heat pump that earns itself, whatever the type of building you have ! But, and this is an important but, the savings are not the most money each year! Long-term, one must consider carefully which choice you make. If you know of that is supposed to stay long in his house, maybe have children, or intending to obtain, (higher hot water consumption) and that it still might be within a few years to make investments in STT heating system, then it must look at other options available.
Do not be fooled by the glossy ads
Power output is specified for the air / air heat pumps is measured at +7 degrees outside, when in principle they are most effective and gives the highest output, in the winter when it's really cold, they just about 50% of the output specified in advertising .
One of the members of the Forum (Gano) has made a telling graph of this, and I insert it with pleasure in this guide.
The curves correspond Sanyo 124 (powerful heat pump), IVT 12FR (high heat) and Mitsubishi's 25 GA (low heat).
Swan is a well-insulated direktelshus built in the 70s with about 20 cm mineral wool in the walls and floors, and this is how it looks!
Finally, during this point you could summarize it this way: Air / air heat pump is a "safe" investment in the sense that it basically guaranteed to earn in 2-4 years, however, it provides no savings in terms of hot water, and it is not capable of spreading the heat to all areas, such as Economist pure and garages, basements and upper floors if it is placed on the ground floor residential part.
The houses built in more than one plane can obviously put a heat pump with two or more parts inside, or better, two heat pumps, it becomes more expensive, and the payoff period may be longer even if the annual savings will increase.
Air / air heat pump advantages
Inexpensive.
Relatively simple (cheap) to install.
Can also be cool hyset when it is hot outside.
Short payback period, usually vested in 2-4 years.
Some people (many) feel that they are a better indoor climate. thanks to the air filter that heat pumps are equipped with.
Air / air heat pump disadvantages
The noise, the fans are heard, especially when they go on high speed, which is important for their effectiveness. This applies to both outside and inside portion.
No hot water production, reducing the potential savings.
If the house has open floor plan and / or in houses built in more than one plane as is the percentage savings are small due to the heat pump can not reach to heat the whole house.
Air filters and condenser should be cleaned, with no or few weeks.
Poor efficiency at outside temperatures below -10 º C at -15 º C gives the most heat pumps is only about 1.5-2.0 in the COP.
Other uppvärmningssytem "must" be, when it is the coldest, they at least output! If the "second" heating system is in poor condition may involve the relatively high overall operating costs for heating, although the heat pump serves himself.
Things to consider before buying
There are certainly a lot to choose from! I think one must buy a proven brand, or brands that you have received good references on.
Buy any heat pump, including installation, it gives you the best guarantees, and guarantees a better option or a free repair of problems - if they arise.
Make sure the pump you choose is suited for the harsh Swedish climate, both in terms of function and defrost / drainage of defrosted water.
Choose a heat pump with R410A as refrigerant, they are more efficient and provides greater annual benefits, especially in colder climes.
Buy an "inverter", ie a variable speed heat pump, it provides better efficiency and generally lower average level.
Please, enter credentials for the installer, it is after all the installation that will ensure maximum savings and minimal concern with noise-pull and heat dissipation.
Do not buy for small heat pump, keep in mind that a 6 kW heat pump only provides about 2-3 kW of heat at -15 º C.
Choose carefully, read the test that I linked to above, and read more in Värmepumpsforum air / air heat pump section you'll find here
http://www.varmepumpsforum.com/vpforum/ ... board=26.0 .
Please feel free to submit more than one quote, please use Värmepumpsforum free quote service,
www.energioffert.se , check around on the internet, large installation companies Elon, (IKEA!), Ahlsell, YORK and others often have promotions on certain models.
Scan also of Swedish manufacturers websites to see if they have targeted campaigns.
If you purchase installation, remember that there is great risk that the guarantees do not apply on the air if the install is not accredited.
To sell an installation incl. commissioning of a non-qualified installer is illegal, all professional installations must be done by an accredited company.
In some municipalities require permission to install air / air heat pump, this due to the noise outside, check with your local council is the case where exactly you live.
How much can you save
I like to say that savings (in an electrically heated houses) usually is about 20-25% of the previous total energy consumption. Greater savings than can be done if one has the right conditions, according to the descriptions I've done above, counting but not more than 50% on the previous total energy consumption. The more houses you have, the lower the overall rate of savings, the greatest savings (in percent) may be in the house with small space, open floor plan, built on one level. If you intend to run your heat pump chiller in the summer, expect significantly smaller percentage savings. The track numbers I would suggest that a normal expected savings in a "normal house" that consumes 20-25000 kWh / year before the installation is in the range 4000-7000 kWh / year.
What does it cost
A typical air / air heat pump installation currently costs around 15000-25000 kr, if you choose more inside parts as are of course a number of additional hundreds of dollars.
But to install itself then?
Sure you can do it! However, there are a number of thought-provoking things to consider before you go and order his heat pump.
It is prohibited to install a heat pump on its own, even the so-called "Quick Connect-pump" such as Jula sells, I'm a little unsure of the range of penalties for this crime, but believe that this is true:
Non-certified companies that install air / air heat violation of existing rules and could be forced to pay an environmental 10-000.
An individual and non-profit organization SEK 3000.
Legal person is an unincorporated association of SEK 10 000.
In addition, the sanction to be fined or imprisoned for up to two years.
The same penalty may affect the customer if he carries on professional activities.
Monitoring of illegal installations are more or less non-existent, I've personally never heard of someone who got fined ...
Here is more info about the regulatory framework:
http://www.notisum.se/rnp/sls/lag/20070846.HTMhttp://www.naturvardsverket.se/sv/Produ ... r-F-gaser/ Private /
http://www.naturvardsverket.se/sv/Produ ... thusgaser/
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