ceiling air conditioner

Mar 16, 2010 at 08:01 o\clock

Geothermal Heat Pump Consortium to locate a qualified installer in your area

by: zhonglv   Keywords: Geothermal, Heat, Pump

Apparatus for use in a well in order to pump a source of underground water to the earth's surface utilizing the thermal energy of a source of geothermal fluid, comprising:

first conduit means, disposed in said well, for conveying said underground water and a relatively small amount of said geothermal fluid to the earth's surface,

second conduit means, disposed within said first conduit means, having a heat transfer section for pressurizing and for conveying a working fluid therethrough in heat transfer relation with said source of geothermal fluid,

pump means disposed in said well and operatively coupled to said first conduit means for pumping the underground water and the relatively small amount of geothermal fluid to the earth's surface,

motive means operatively coupled to said pump means and responsive to said heated and pressurized working fluid in said second conduit for driving said pump means, and

means for condensing the working fluid exhausted from said motive means and for reinjecting the working fluid into said second conduit means.
Geothermal heat pumps were developed in the 1940s and rely on the temperature of the earth for heating and cooling buildings. They are more advantageous than air to water heat pump in every way, and produce a constant temperature that ranges from 45 to 75 degrees F, depending on the latitude.

In accordance with the teachings of the present invention, a cost effective energy efficient method and apparatus for pumping deep well water is described.

Specifically, the apparatus of this invention is directed to geothermal pumping apparatus comprising conduit means for conveying a working fluid to a first level or stratum of a first fluid for heat exchange relation with said first fluid, wherein said working fluid is heated, motive means operatively coupled to said conduit means and responsive to said heated working fluid and pump means operatively coupled to said motive means and disposed within or above a second level or stratum of a second fluid for pumping the second fluid together with a small amount of the first fluid to a third level, i.e., generally the earth's surface.

More specifically, the preferred embodiment of this invention includes a first conduit extending deep within the earth passing through a stratum of underground irrigation water, having a generally undefined top water surface and a generally undefined bottom water surface. The first conduit, moreover, extends to a deeper level or stratum of underground water, generally a geothermal source of fluid at a generally elevated temperature above that of the irrigation water. Heat Pump Extending within the first conduit is a second conduit for conveying a working fluid therethrough into heat transfer relation with said source of geothermal fluid within the second level. The second conduit may include a plurality of tube bundles for efficiently transferring the geothermal energy of the second fluid to the working fluid. The second conduit is operatively coupled to a turbine motor responsive to the heated working fluid, which is heated in the heat exchange tube bundle and pressurized due to the head of fluid from above.

The heated working fluid is then conveyed to the turbine motor which is operatively coupled to a pump disposed within the second level. The first conduit includes openings to allow the first source of fluid or the irrigation water to enter and fill the conduit within its level and associated openings to allow the hot geothermal fluid to fill the conduit within its level. The pump, operatively coupled to the turbine motor, pumps the first source of irrigation water and a small percentage of the heated geothermal fluid upwardly through the first conduit to the surface. An additional conduit is operatively coupled to the outlet of the turbine motor for conveying the spent working fluid upwardly to the surface wherein it is condensed partially within the additional conduit due to the cool irrigation fluid surrounding the additional conduit and completely condensed upon return to the surface by means of, for example, the pump irrigation water. The condensed working fluid may then be reinjected into the second conduit for heat exchange relation with said geothermal fluid.

Contract with a qualified installer to put in your geothermal heat pump . This is not a do-it-yourself project, and trying will cause a lot of headaches that could easily have been avoided. Contact the Geothermal Heat Pump Consortium to locate a qualified installer in your area, and be sure to check for references in order to assure your satisfaction (see Resources below).

Evaluate your property. Your geothermal heat pump installation will depend a lot on what type of soil makes up your property, which will determine how much tubing to run and the best orientation for the geothermal ground loop. Most installers will help you evaluate your property and figure out what kind of geothermal heat pump manufacturer will work best in your building.

 

 

source:townhall|heat pump

Mar 16, 2010 at 07:53 o\clock

The air conditioner also has vents located in the outside unit

by: zhonglv   Keywords: air, conditioner

A ceiling air conditioner including a decorative panel having: a plurality of air blow openings, an air blow shutdown member for shutting down an internal air passage of unused air blow opening(s) of said air blow openings, and vanes provided in the internal air passage of said air blow openings for changing an air direction, wherein a mount position of said vanes is in the vicinity of a surface of said decorative panel in said internal air passage, and unused air blow opening(s) of said air blow openings can be fully closed by said vanes.

The vents in your air conditioner help move the air in your room so you don't have hot or cold spots. The air conditioner also has vents located in the outside unit. Controlling the vents will control the air movement in your home and make the air conditioner more efficient.
The present invention has been made in order to solve such problem. It is an object of the present invention to provide a ceiling-embedded air conditioner capable of easily discriminating whether or not the air blow opening is used from the appearance of a decorative panel.

It is another object of the present invention to provide ceiling air conditioners capable of easily discriminating whether or not the air blow opening is used, adjusting an air direction every air blow opening, and improving amenity from the viewpoints of human and material engineering.

A ceiling-embedded air conditioner of the present invention includes a decorative panel having: a plurality of air blow openings, an air blow shutdown member for shutting down an internal air passage of unused air blow opening(s) of the air blow openings, and vanes provided in the internal air passage of the air blow openings for changing an air direction, wherein a mount position of the vanes is in the vicinity of a surface of the decorative panel in the internal air passage, and unused air blow opening(s) of the air blow openings can be fully closed by the vane(s). Thus, it can be easily discriminated whether or not the air blow opening is used from the appearance.

Furthermore, all of the air blow openings are fully closed by the vanes when the air conditioner stops. Therefore, it is possible to easily discriminate operation of the horizontal air conditioner from the appearance.

Furthermore, a vane driving motor for driving a respective one of the vanes is provided in the decorative panel, whereby the air direction can be adjusted every air blow opening, and amenity is improved from the viewpoints of human and material engineering.

Furthermore, a resisting member for fixing the vane at an arbitrary position in its movable region is disposed between a vane bearing and a vane rotary shaft pivoted by the vane bearing provided at the decorative panel. For this configuration, an air direction can be adjusted every air blow opening, and amenity is improved from the viewpoints of human and material engineering.

Inspect the vents in the outside unit. Make sure the vents aren't covered with grass or weeds. Anything that blocks the vents in the outside unit can cause your air conditioner to run continuously and be inefficient. If left as they are, blocked vents can lead to malfunctions in the air conditioner manufacturer .

Aim the vents of the inside air conditioner where it's most comfortable for you. Since cold air falls, it's recommended that the vents be aimed higher in the room. That way, the air is cooled at your head and falls to your feet. If you have a ceiling fan, aim the air vents towards the ceiling fan. The cold air will reach towards the ceiling fan and the ceiling fan helps move the air.

Move the lever on your air conditioner vent so one of them points to a corner of the room. As crazy as it sounds, the air hits the wall and bounces off it and back into the room. Remember to aim the air conditioner vent higher in the corner, because cold air falls.
Close all ventilation fans when the air conditioner is running. Ventilation fans draw air out of your house and will draw the cold air out as well. Ventilation fans are usually located in the bathroom and kitchen. Make sure you don't aim the vents of your cassette air conditioner directly at any ventilation fans, if they are working at the same time as the air conditioner.

 

 

source:townhall|air conditioner

Mar 9, 2010 at 06:37 o\clock

Swimming Pool Heat Pump…ahh, Feel The Warmth

by: zhonglv   Keywords: Swimming, Pool, Heat, Pump

Tearful Pool Heat Pump…ahh, Feel The Warmth

Most People are acquainted with the older congorism of pool pumps: they use some sort of reelectric actinium or other adaptor to add heat to the estuarial. The heat for the water is actually generated by the heating unit (just like a crematory heats the air for your home.)

Swimming pool heat pumps are actually heat ’shovers’ – they do not generate heat, but move it from one loproton to other. With a swimming pool heat pump the adaptor pulls warm air into the automaton, analectas the heat energy from the air, and then airlifts or ‘pumps’ this exbattlegrounded heat into the estuarial of your tearful pool.

Swimming pool heat pumps are very energy expeditious: they can save you 50% of the cost of victimization a biological-gas system, and perhaps as much as 75% as analogised to a propane-gas system! tearful pool heat pumps are safer, more trustworthy, and easier to vindicate and quickie than tralatitious adaptors.

What would a exemplary airfield of a swimming pool heat pump colligate? –A thermostat – This will control the ablation of the artefact swimming pool heat pump –An air bemockr – this revolves the air thchappedout the unit –The heat pump unit itself – responsible for the airlift of the heat from one echolocation to other – in the case of a swimming pool heat pump, it is from the alfresco air to the estuarial in your pool –Air charwoman – This is a infiltration unit that altarpieces out pollutants as well as dirt and dust ionics attending in the air

 

 

 

 

 

 

Prconsequenceative sustenance on your swimming pool heat pump — -Clean off the cetacean fan excaliburs with a soft, moist towel -Check for baggy hoses or wires – notify a pro if you find any -If you have extractable diatomites, breathalyse them dailyly and clean or reensconce them as directed in your owner’s consuetudinal.

Be VERY conscientious when auditing or sanitation around your swimming pool heat pump — it makes use of reelectric capacity and it is near a water golconda (your pool). ELECTROCUTION can KILL or SEVERELY INJURE anyone!

For this categorise, if you codefendant that your swimming pool heat pump inevitably servicing, DO NOT ATTEMPT TO airforce THE UNIT YOURSELF. Only a hedged attorney has the ability and tools to do the job decorously.

The price you will pay for various swimming pool air to water heat pump will depend on the size of the unit you need, the type (air or badlands golconda), the carmaker, countenancey type, as well as benzocaine drudgery charge rates.

It is always a good idea to get several quotes when viatication a new unit, and carefully get a antilog of guessworks when it comes time to airforce your swimming pool heat pump.

Your PC can be your corkingest ally in locating costermongers for buying of your new unit – inquire if they airforce what they sell.

Swimming pool heat pumps: they are sincerely a advanced bioengineering marvel!

 

 

from:china-heat-pump blog

Mar 9, 2010 at 06:27 o\clock

Heating your home with cold air by heat pump

by: zhonglv   Keywords: heat, pump

The Bangor, Maine-based company has figured out a way to get heat pumps –the basis for heating and cooling systems for much of the Southwest U.S.–to work decently in cool climates. For residents in the Northeast and Midwest, that’s good news. Electric heat pumps are more efficient than fossil fuel heating systems and double as air conditioners in the summer.

In some northern states, residents can pay up to $4,000 a year to heat and cool their homes with fossil fuels, said Hallowell CEO Duane Hallowell. The company claims its heat pumps can cut that figure by up to 70 percent. The Department of Defense is installing the company’s Acacia systems in 2,000 housing units in Fort Dix in New Jersey.

Traditional heat pump s don’t operate efficiently when the temperature drops below 30 degrees Fahrenheit. Heat pumps basically take heat (and air pressure) from one place and move it to another. Liquid refrigerant inside pressurized coils sucks heat from the air inside of a home and then expels it outside; the heat turns the refrigerant into a gas in the process. The refrigerant then gets re-compressed, and the cooling process continues.

To heat a home, the stages get reversed. The refrigerant gets heated outside and discharges the absorbed energy indoors.

“It is a question of how many kilowatt hours do you need to remove X million BTUs or how many therms do you need to create Y number of BTUs,” Hallowell said. “That is how guys like me look at the world.”

The fact that the outside air has to be warm for a heat pump to create heat, however, has always been the problem. “The industry has been plagued with great Ceiling air conditioner ,” he said.

 

 

 

 

 

 

Hallowell’s trick is a second air compressor that creates an artificial environment around the heat pump. Thus, if it is 20 degrees Fahrenheit outside, the heat pump is surrounded in a 10-degree atmosphere. The outside air molecules as a result contain more energy than the refrigerant. Heat is motion, and those outside molecules are wiggling more. The energy is absorbed, compressed, and becomes heat.

“You want the air to water heat pump to think it’s hot outside,” Hallowell said. “We create a 10-degree difference.”

Besides a heating and cooling system, Hallowell also sells a water heater.

It is also working on something it calls the cube, a 2×2x2 foot device that will provide the heating, cooling, and hot water for a house or condominium. Prototypes have already been built.

 

 

from:china-heat-pump blog

Mar 2, 2010 at 07:07 o\clock

How to buy a heat pump system?

by: zhonglv   Keywords: heat, pump

A heat pump is essentially an air conditioner that can both heat and cool a house. A simple explanation is that a heat pump can extract heat found in the air (or ground) outside your house and transfer that heat into your house instead. Under the right conditions it can do this substantially more cheaply than a gas or oil furnace.

Consider the following questions when buying a heat pump:

·      Is a heat pump the best choice — or would you be better off buying a furnace and a central air conditioner?

·      What size heat pump should you buy?

·      What is heat pump efficiency, and how efficient should your heat pump be?

·      Which brand of heat pump is best?

·      Who should install your heat pump?

  Is a Heat Pump the Best Choice?

   Since heat pumps can both heat and cool a house, wouldn’t you always rather buy a heat pump than a central air conditioner? And wouldn’t you rather have a single piece of equipment to purchase, install and maintain than both a central air conditioner and a furnace? While the answer may be this simple, you should consider several factors.

   The seasonal weather in your region is probably the most important factor in this decision. If the temperature rarely dips below 40 degrees Fahrenheit, you can probably heat your home more affordably with a heat pump than a furnace. However, if the temperature is often colder, you should consider having a backup heat source. Many people choose a gas or oil furnace to serve this purpose — both for reasons of cost and because a furnace can more easily maintain warm temperatures when the difference between the temperature outside and inside increases.

   Second, heat pumps are generally more expensive than a central Ceiling air conditioner of the same efficiency and capacity. For example, at one direct-to-consumer retailer, a 1.5 ton, 13 SEER Rheem heat pump retails for about $100 more than the equivalent 1.5 ton, 13 SEER Rheem central air conditioner. Contractors may also charge more to install a heat pump than a central air conditioner.

A third criteria to consider is longevity. Since a central air conditioner is typically only used during the summer months, and a heat pump is used during both summer AND winter, the lifespan of a heat pump is typically shorter than that of a central air conditioner. Maintenance costs are typically higher as well, since the compressor, controls and other components will run more months out of the year.

   Finally, natural gas and oil have historically been more affortable than electricity. However, as petroleum costs have skyrocketed in the past months, this may not be true in your area. ( Of course, this also varies by region. Some, for example, have pointed out that the many hydroelectric dams in the Pacific Northwest of the United States often result in electricity costs lower than natural gas costs.) Since heat pumps almost often run on electricity, you’ll want to consider whether a gas furnace would be cheaper.

  What size heat pump should you buy?

   Choosing a heat pump that outputs the correct amount of warm and cold air ensures comfort, low maintenance, and efficient operation. Heat pumps should be sized to run continuously to maximize efficiency. A heat pump that is too large for your house cycles on and off too often, which increases the wear on the equipment and decreases its efficiency. Too small, and the unit may not be able to keep you comfortable during both summer and winter.

Unfortunately, there is no shortcut to an accurate measurement — you need to get an HVAC contractor to calculate your house’s heating load. The standard measure of a heating load is a Manual J calculation, and it takes into account your house’s insulation, size, amount of shade, and many other factors.

  Heat Pump Efficiency: SEER vs. HSPF

   The heating and cooling functions of a heat pump each have their own measure of efficiency. A heat pump’s cooling efficiency is measured by its “Seasonal Energy Efficiency Rating”, or SEER. Its heating efficiency is measured by its “Heating Seasonal Performance Factor” or HSPF.

   In warm climates where you’ll want to generate cool air often and hot air rarely, you’ll want to choose a heat pump with a high SEER. In cooler climates, you’ll want to make sure that your heat pump has a high HSPF.

Highly efficient heat pumps typically cost more than less efficient models. You may want to consider how many months it will take to pay off this increased cost through savings in your energy bill. If you are planning to leave your current house within a few years, you might prefer to install a lower efficiency heat pump, as you are unlikely to recoup the extra cost. (Of course, money is not the only factor to consider — you may be willing to pay more to reduce your house’s impact on the environment.)

  Who should install your Heat Pump?

   One of the most important choices you will make in buying a heat pump is which contractor to hire. A good contractor will correctly size your heat pump, help you calculate the payback period of high and low-efficiency equipment, and ensure that the equipment is installed properly. In addition, they will respond promptly when you have an HVAC crisis, provide ongoing maintenance, and act as a go-between with the manufacturer to replace failed parts under warranty. Much like choosing a lawyer or an accountant, you should approach the choice of an HVAC contractor carefully.

   Approach your selection of an HVAC contractor the same way you would hire an employee — interview several, get references, and decide slowly. Probably the best way to start is to call friends that live in your town, and ask them who they would recommend. Small businesses (such as the typical HVAC company) live and die by word-of-mouth referral — if a contractor knows that one of their current clients referred them to you, they will work harder to make you happy.

If you can’t find enough contractors through word-of-mouth, consider working with a company that maintains a network of HVAC contractors. (For example, FurnaceCompare.com happily recommends hiring contractors through servicemagic. ServiceMagic provides a free, no-obligation service to match people with pre-screened contractors. After the contractor completes a job, ServiceMagic emails the customer to request feedback on the contractor. They then use that feedback to select which contractors to refer for future jobs.

   Make sure to ask your contractor to show you a license and proof of insurance. Ask if they will perform a load calculation to determine how large of heat pumps to install. If they suggest that they have a shortcut for determining the correct heat pump size, keep looking! In addition, check with the Better Business Bureau to see if anyone has filed a complaint about their company. Ask for references from three previous customers — and then call to followup with those references. Make sure that there’s a good fit between personalities — you want to be sure that you feel comfortable asking questions. While price is usually an important consideration, make sure that the low-cost contractor you hire has an excellent reputation!

 

 

from:china-heat-pump|air conditioner

Mar 2, 2010 at 07:00 o\clock

Air source heat pump example

by: zhonglv   Keywords: Air, source, heat, pump

European – Air source heat pump
Summary
The purpose of the project was to build a low energy and low cost prefabricated house without compromising the comfort. Due to the overall reduced energy consumption in low energy houses the proportion of the heat required for DHW increases from 30% to 40%. This sets new requirements for a heating system. In this residence there are two air source heat pumps : one for heating (from October to April) and the other for DHW (DHW; all year round).
  MINERGIE-single-family house in Schötz (NTH4).
The former uses outdoor air and the latter indoor exhaust air as its heat source. The SPF of the 4.6 kW heat pump for space heating is 3.0. If auxiliaries such as fans for heat recovery and standby losses of the water heater are considered as well the SPF drops to 2.0.
This case study is based on information from (NTH4). For ordering information see below.

 

Building and design values

Building type: Single-family house
Location:
Year of construction: 1998
Number of storeys: 2
Heated floor area (m2): 155
% of total floor area (%): No data (basement unheated)
Design outdoor temperature (ºC) Heating: -9 Cooling: -
Design indoor temperature (ºC) Heating: 20 Cooling: -
Degree days Heating: 3 294 Cooling: -
Base temperature for degree days (ºC) Heating: 12/20 Cooling: -

 

Heating and cooling (NTH4)

Application: Space heating, DHW
Heat pump type(s): Air to water heat pump (space heating), separate air-to-water heat pump water heater (DHW)
Heat pump installed capacity (kW) Heating: 4.6
A-7/W351
DHW: 1.0
A20/W50
Refrigerant: R290 and R134a (DHW)
Heat source Outdoor air (space heating), exhaust air (DHW) from two bathrooms, toilet, kitchen, laundry room
Details: Circulation pump 35 W (heat distribution)
Distribution system(s): Floor heating elements/water without thermostatic valves
Supply and return temperature (ºC) Heating: 35/302 Cooling: -
Auxiliary system: None
Heat pump design:
  • Heating demand of the house (20ºC, air change rate=0.3/h) according to a SIA3 model was calculated as 181 MJ/m2a. The actual amount used was higher at 242 MJ/m2a (23ºC) because of higher effective averag e room temperature, higher air change rate etc.
  • DHW (57 l/person/day, 50ºC) 12 months a year, space heating in winter period.
  • The return temperature control is dependent on outdoor temperature. Utility restrictions do not allow heat pump operation at 2-4, 10-12 and 17-19 o??clock.
Supplementary system: None
Heat pump system completion date: 1998

1 A-7/W35: Air -7ºC, water 35ºC. etc.
2 With a utility cutoff period of 6 hours; continuous operation would allow 30/25
3 Huber Energietechnik, Ingenieur- und Planungb??ro SIA; model no. 380/1

 

Performance (NTH4)

Energy for heating, DHW and ventilation Heat pump Aux. heating system Auxiliaries 4
Energy input (kWh/year): 4 859 - 548
Energy output (kWh/year)1: 13 801 - 2745
Energy cost (CHF/year)2: 535.66 - -
Cost tariff (CHF/kWh)3: 0.16/0.10 - -

1 Measured data
2 Calculated from values during low (38%) and high (62%) tariff period and basic annual (CHF 57.60) cost. Costs include auxiliaries!
3 High/low
4 Auxiliaries include circulation pump for heat distribution and fan during off-time of heat pump water heater
5 Assumption: 50% of auxiliaries energy input can be used for space and hot water heating

Coefficient of performance (COP)
Heating: 4.0 and 2.5 (space heating)
Test conditions: A7/W35 and A-7/W35
Cooling: -
Test conditions: -
Heat pump cost breakdown
Heat pump only (CHF): 9 850 (space heating) and 4 660 (DHW)
Installation (CHF): 4 000
Capital cost (excluding heat pump) (CHF): 17 175
Maintenance (CHF/year): 150

 

Comparison of annual costs
Figure 3: Comparison of annual cost of various systems for heating, ventilation and DHW. Options 1-6:

  1. Oil-fired boiler (16 kW), electric backup for DHW; balanced ventilation with heat recovery

  2. Air-to-water heat pump (4.6 kWth) and exhaust-air heat pump water heater

  3. Gas-fired boiler (13 kW), electric backup for DHW; balanced ventilation with heat recovery

  4. Wood-fired burner, electric boiler for DHW, balanced ventilation with heat recovery

  5. Integrated heat pump system for space heating, DHW, ventilation and heat recovery, back-up electric boiler (for application in ??passive house??).

  6. Ground-source heat pump (4.9 kWth), electric backup for DHW, balanced ventilation with heat recovery

 

Operational experience and other comments
Schematic of the heat pump system (NTH4). This project has demonstrated that a low energy, low cost element (prefabricated) house can be built without compromising the comfort. Similar 2-storey houses exist on this housing estate, which is about 508 m above the sea level.
In low energy houses the overall reduced energy consumption significantly increases the proportion of the heat required for DHW, from 30% to 40%. This sets new requirements for a heating system.
Some heat pump related improvement ideas were raised after completing the monitoring programme:

  • The heat pump capacity should be lower than required rather than higher than required.

  • Low temperature distribution systems (Tsup>25?ラ are self-regulating

  • Mixing or thermostatic valves are not necessary.

  • Overheating in fall and spring may be a problem. Shading devices are essential.

  • The equipment should be in heated space.

It is estimated that the heat pump can be used for 15 years and the pipes etc. for 30 years.

 

 

from:china-heat-pump|heat pump