ceiling air conditioner

Dec 29, 2009 at 02:44 o\clock

Water source heat pump exchanges heat with the ground

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

Like a refrigerator or air conditioner, these systems use a heat pump to force the transfer of heat. Heat pumps can transfer heat from a cool space to a warm space, against the natural direction of flow, or they can enhance the natural flow of heat from a warm area to a cool one. The core of the heat pump is a loop of refrigerant pumped through a vapor-compression refrigeration cycle that moves heat. Heat pumps are always more efficient at heating than pure electric heaters, even when extracting heat from cold winter air.

But unlike an air source heat pump , which transfers heat to or from the outside air, a water source heat pump exchanges heat with the ground. This is much more energy-efficient because underground temperatures are more stable than air temperatures through the year. Seasonal variations drop off with depth and disappear below seven meters due to thermal inertia.

 

 

Like a cave, the shallow ground temperature is warmer than the air above during the winter and cooler than the air in the summer. A water source heat pump extracts ground heat in the winter (for heating) and transfers heat back into the ground in the summer (for cooling). Some systems are designed to operate in one mode only, heating or cooling, depending on climate.

The setup costs are higher than for conventional systems, but the difference is usually returned in energy savings in 3 to 10 years. System life is estimated at 25 years for inside components and 50+ years for the ground loop.As of 2004, there are over a million units installed worldwide providing 12 GW of thermal capacity, with an annual growth rate of 10%. If deployed on a large scale, this technology may help reduce energy costs and alleviate global warming.

 

from:http://zhonglv.blogtownhall.com/

Dec 29, 2009 at 02:35 o\clock

The High and Mid-static pressure duct air conditioners

by: zhonglv   Keywords: duct, air, conditioner

Ducts are used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. These needed airflows include, for example, supply air, return air, and exhaust air.Ducts also deliver, most commonly as part of the supply air, ventilation air. As such, duct air conditioner are one method of ensuring acceptable indoor air quality as well as thermal comfort.

A duct system is often called ductwork. Planning ('laying out'), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design.

The position of the U.S. Environmental Protection Agency (EPA) is that "If no one in your household suffers from allergies or unexplained symptoms or illnesses and if, after a visual inspection of the inside of the ducts, you see no indication that your air ducts are contaminated with large deposits of dust or mold (no musty odor or visible mold growth), having your air ducts cleaned is probably unnecessary."

Studies by the EPA and the Canadian Mortgage and Housing Corporation (CMHC) in the 1990s has lead CMHC to conclude that "duct cleaning will not usually change the quality of the air you breathe, nor will it significantly affect airflows or heating costs".

 

 

 

 

The High and Mid-static pressure duct  air conditioners are specially designed for European Family and office. 

With long experience in this field, create exellent products with perfect performance, strong capacity.

The product range is from 18000BTU to 60000BTU

duct air conditioner are the best design in the world with the following characters.

1.High efficiency with R410A refrigerant and optimized design.

2.Intelligent design for easy maintenance of whole unit and replacing filter.

3.Special design for cold winter and strong heating in super low temperature .

4.Smart design enable free electric box installation for both sides of the unit at the spot.

5.Two kinds of air pressure can be selected at the installation spot.

6.With advanced fresh air function keep our life more healthy.

7. Only 2/3 thickness of normal duct unit for easy installation and saving space.

8. Phone call remote control

 

from:http://zhonglv.blogtownhall.com/

 

Dec 22, 2009 at 07:28 o\clock

Air Conditioner systems becomes more widely into life

by: zhonglv   Keywords: Duct, Air, Conditioner

With the high-end the office and working environment of continuous improvement,  Duct Air Conditioner systems are also becoming more widely deeply into daily life. How to make air-conditioning system chosen to play the best results, in addition to the design reasonable, air conditioning and ventilation works is also an important factor. Air conditioning and ventilation duct work, as an important link in the quality of its construction will have a direct impact on the quality of system installation and operating results. Among the many air conditioning and ventilation works, due to the wind pipe fabrication and installation of quality problems caused by insufficient air supply, air leakage in excess of regulatory requirements, resulting in energy waste, less heat and air conditioning ventilation engineering operation instability phenomena have affected the normal operation of air-conditioning.
 
(1) phenomenon: the plate surface smooth, uniform thickness, with a clear indentation, cracks, blisters, scarring, and corrosion and other conditions; duct plane goes down, convex side outwards, with a clear distortion.
2) harm: the system is running, the wind pipe leakage, resulting in  Duct Air Conditioner load losses, and affect the life of the wind pipe; air tube surface vibrate, producing noise.
(3) Analysis: production of duct before, there are no materials used for quality inspection; do not measure the thickness of steel plate.
(4) prevention and control measures: First check the material quality of the materials factory certificate and proof, and then check the material appearance; measuring the thickness of steel plate.
 
3.2 Duct distort and bend angle is not accurate
(1) phenomenon: the two relatively flat rectangular duct is not parallel, not parallel to the surface at both ends; CORNER is not flat; diagonal not equal; Seams lax.
(2) harm: make duct connection Shouli Bu uniform, after installation of the duct is not straight, flange gasket is not tight, the system leakage, resulting in loss of air-conditioning load and shorten the service life; impact of the wind pipe, tuyere the exact installation location.
(3) Analysis: Cutting board not accurate setting-out; Duct Air Conditioner 22 in parallel, the relative surface of sheet length and width are not equal; air duct seams, the width of the corners of the office not equal; seams, seam area set up right, hand-biting Kuchinui force sample sizes; did not take appropriate measures for reinforcement.
(4) prevention and control measures: proceed to the next feed, it should be strictly on the sheet metal angle side of each piece of sheet metal the length, width, and testing the diagonal, so that their bias control within the allowable range; the next material sheet after the and should be duct relative surface two sheets coincide up to test the accuracy of size; sheet metal seams, size must be properly set aside in order to ensure seams, the width of the same; seams, seam located in four corners area, manual locking together When sewing with a wooden hammer first seams at both ends of center of matter, and then evenly along the length of playing real; implementation of the national standard, "Ventilation and air-conditioning works and the acceptance of norms" of the relevant provisions.
 
from:http://zhonglv.blogtownhall.com/
http://zhonglv.blogtownhall.com/

Dec 22, 2009 at 07:14 o\clock

The Direct exchange geothermal heat pump

by: zhonglv   Keywords: heat, pump

A geothermal heat pump or ground source heat pump (GSHP) is a central heating and/or cooling system that pumps heat to or from the ground. It uses the earth as a heat source (in the winter) or a heat sink (in the summer). This design takes advantage of the moderate temperatures in the ground to boost efficiency and reduce the operational costs of heating and cooling systems, and may be combined with solar heating to form a geosolar system with even greater efficiency.

Geothermal heat pumps are also known by a variety of other names, including geoexchange, earth-coupled, earth energy or water-source heat pumps. The engineering and scientific communities prefer the terms "geoexchange" or "ground source heat pumps" because geothermal power traditionally refers to heat originating from deep in the Earth's mantle. Ground source heat pumps harvest a combination of geothermal power and heat from the sun when heating, but work against these heat sources when used for air conditioning.



The Direct exchange geothermal heat pump is the oldest type of geothermal heat pump technology. It is also the simplest and easiest to understand. The ground-coupling is achieved through a single loop circulating refrigerant in direct thermal contact with the ground (as opposed to a refrigerant loop and a water loop). The refrigerant leaves the heat pump appliance cabinet, circulates through a loop of copper tube buried underground, and exchanges heat with the ground before returning to the pump. The name "direct exchange" refers to heat transfer between the refrigerant and the ground without the use of an intermediate fluid. There is no direct interaction between the fluid and the earth; only heat transfer through the pipe wall. Direct exchange heat pumps are not to be confused with "water-source heat pumps" or "water loop heat pumps" since there is no water in the ground loop. ASHRAE defines the term ground-coupled heat pump to encompass closed loop and direct exchange systems, while excluding open loops.

from: http://zhonglv.blogtownhall.com/

Dec 16, 2009 at 06:19 o\clock

The High and Mid-static pressure Duct Air Conditioner

by: zhonglv   Keywords: Duct, Air, Conditioner

  • The High and Mid-static pressure Duct Air Conditioner are specially designed for European Family and office.
  • With long experience in this field, we create exellent products with perfect performance, strong capacity.
  • The product range is from 9000BTU to 65000BTU
  • Duct Air Conditioner are the best design in the world with the following characters.
  • 1.High efficiency with R410A refrigerant and optimized design.
  • 2.Intelligent design for easy maintenance of whole unit and replacing filter.
  • 3.Special design for cold winter and strong heating in super low temperature .
  • 4.Smart design enable free electric box installation for both sides of the unit at the spot.
  • 5.Two kinds of air pressure can be selected at the installation spot.
  • 6.With advanced fresh air function keep our life more healthy.
  • 7. Only 2/3 thickness of normal duct unit for easy installation and saving space.
  • 8. Phone call remote control
 
  • High effciency with R410A refrigerant and optimized design
  • All the COP is more than 3 with high technology. It means the out put capacity is more than three times of the input power.
  • Intelligent design for easy maintenacnce of whole unit and replacing filter.
  • When maintenance, it doesn't need to unmount the whole indoor unit from the ceiling. The unit can be easily uncovered Any parts can be seperatly unmounted by unscrewing just two screws. Also the filters can be dasily taken out for cleaning.
  • Special design for cold winter and strong heating in low temperature.
  • The heat pump is specially protected to star in very cold winter, ever in-15 centigrade.
  • Smart design enable free electric box installation for both sides of the unit.
  • The indoor,electric box can be freely installed unifiedly in the wall cabinet.
  • Two kinds of air pressure can be selected at the installation spot.
  • The installer can easily select the air pressure according to actual duct length when install the unit.this character make the unit instalation region wide and keep the noise level low.
from:china-heat-pump

Dec 15, 2009 at 09:46 o\clock

Types of heat pumps

by: zhonglv   Keywords: heat, pumps

The two main types of heat pumps are compression heat pumps and absorption heat pumps. Compression heat pumps always operate on mechanical energy (through electricity), while absorption heat pumps may also run on heat as an energy source (through electricity or burnable fuels).

A number of sources have been used for the heat source for heating private and communal buildings .

    * air source heat pumps (extracts heat from outside air)


Smart Combination of
*Air conditioning heating
*Air conditioning cooling
*And Clean Sanitary Water Heat Pump Heater.
Two Water Tanks Built Inside. Seperate Water Cycle For Air Conditioning and Domestic Water.
5 Times Energy Saving as Normal Gas or Petrol Heater.
1/4 OF Normal electricicty power Bill Help You to Win the Whole Unit Free In One Year. 
 

          o air–air heat pump (transfers heat to inside air)
          o air water heat pump (transfers heat to a tank of water)

 


    * geothermal heat pump (extracts heat from the ground or similar sources)


          o geothermal–air heat pump (transfers heat to inside air)
                + ground–air heat pump (ground as a source of heat)
                + rock–air heat pump (rock as a source of heat)
                + water–air heat pump (body of water as a source of heat)
          o geothermal–water heat pump (transfers heat to a tank of water)
                + ground–water heat pump (ground as a source of heat)
                + rock–water heat pump (rock as a source of heat)
                + water–water heat pump (body of water as a source of heat)

from:china-heat-pump

 

Dec 11, 2009 at 04:35 o\clock

With advanced fresh air function keep our life more healthy

by: zhonglv   Keywords: Duct, air, conditioner

The High and Mid-static pressure heat pumps are specially designed for European Family and office.

Duct air conditioner are the best design in the world with the following characters.

  • 1.High efficiency with R410A refrigerant and optimized design.
  • 2.Intelligent design for easy maintenance of whole unit and replacing filter.
  • 3.Special design for cold winter and strong heating in super low temperature .
  • 4.Smart design enable free electric box installation for both sides of the unit at the spot.
  • 5.Two kinds of air pressure can be selected at the installation spot.
  • 6.With advanced fresh air function keep our life more healthy.
  • 7. Only 2/3 thickness of normal duct unit for easy installation and saving space.
  • 8. Phone call remote control

 

 


  • With advanced fresh air function keep our life more healthy.
  • Fresh air function can be easily achieved by install one pipe from our duct unit to outdoor. The fresh air will be blowed out after it is filtered and treated by our unit. This function can save one fresh air machine for us.

 

 

  • 2/3 of normal thickness for easy installation and saving space.
  • With almost 2/3 of normal thinkness It provide the comfortable feeling for both installers and customers. Duct air conditioner are distributed in longitudinal way, that is most loved by the installation engineers for the convenience.

 FROM: china-heat-pump

Dec 8, 2009 at 08:35 o\clock

The useful of geothermal heat pump

by: zhonglv   Keywords: geothermal, heat, pump

Geothermal heat pump use (use of geothermal heat pump) is the application of heat pump technology for development and utilization of geothermal energy. Geothermal heat pump with electric drive and two kinds of heat-driven.
 
Electric-driven vapor compression heat pump which could take less than 40 ℃ or less than the 7 ~ 12 ℃ well water, spring water can be upgraded to the level of 45 ~ 65 ℃ for winter heating / heating use. While in the summer, using geothermal water-driven absorption heat pump can be used to 65 ~ 100 ℃ of geothermal energy for cooling, improved efficiency in the use of geothermal energy. Whether it is electric-driven heat pump or heat-driven heat pump that works is the use of different media at different pressure by a different phase transition temperature to complete the heat transport, and in low-pressure environment and make the appropriate low-temperature endothermic evaporation into a high-pressure environment condensation under high-temperature heat, and thus to remove the heat from the low-temperature heat source sent to high-temperature heat source, in order to achieve cooling (for the endothermic evaporation side) or heating (for the condensation heat side) purposes.
 
Nearly 30 countries use geothermal heat pump technology, according to statistics, the total installed capacity has reached more than 50 million units, installed capacity of 6849 megawatts, an annual use of geothermal energy reached a total of 23214 too much coke / year. A set of the world's largest geothermal heat pump system built in Kentucky, which uses the geothermal water 14.4 ℃ to 158.9 thousand square meters of hotels, apartments and office buildings such as cooling / heating, with a total capacity of 16.5 megawatts, has been in operation 10 years, economic and social benefits are very significant。
 
 
 
 

Geothermal multi-functional heat pump

 
Smart Combination of
*Air conditioning heating
*Air conditioning cooling
*And Clean Sanitary Water Heat Pump Heater.
Two Water Tanks Built Inside. Seperate Water Cycle For Air Conditioning and Domestic Water.
5 Times Energy Saving as Normal Gas or Petrol Heater.
1/4 OF Normal electricicty power Bill Help You to Win the Whole Unit Free In One Year.
 
 

Dec 4, 2009 at 04:31 o\clock

water source heat pump system application and case study

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

Heat pump systems are applied mostly in hot water supply,heating in HVAC and swimming pool temperature maintaining.Heat pump can replace oil-fired or gas-fired boilers in hotel,hospital,dormitory and gymnasium to reduce running cost.According to the application condition in buildings,heat pump systems can be classified into two typical categories which as air source and water source.Air source heat pump is easier to install and to use.But the problem is how to keep it operating at higher efficiency.On the otherhand,water source heat pump system is from time to time combined with HVAC system in building.It is more efficient than air source heat pump,even though there are more considerations need to consider in planning.

Heat pump business applications for almost 20 years of history, the United States to 1985 there were 14,000 units heat pumps, to 1997 on the installation of 45,000 units, up to now has been installed more than 400,000 units, and the rate of 10% per annum has increased steadily. In 1998 the U.S. commercial buildings (International hotels, large hospitals), the heat pump system, air conditioning accounts for 19% of the total capacity, which accounted for 30% of new construction .
 
U.S. pump industry has been established by the U.S. Department of Energy, EPA and many heat pumps manufacturers heat pump composed of the United States Association, the Association will invest 100 million U.S. dollars in recent years engaged in the development, research and extension work in 2001 to reach 400,000 units per year to install heat pumps goal to reduce greenhouse gas emissions by 1 million tons, equivalent to a reduction of 50 million cars or planting a tree discharge of pollutants a million acres, the annual energy cost saving of 4.2 billion U.S. dollars, Since then, the annual savings of energy costs an additional 170 million U.S. dollars .
 
And the United States the development of different heat pump, central and northern Europe such as Sweden, Switzerland, Austria, Germany and other countries are mainly the use of shallow geothermal resources, underground soil buried coil (the depth of "400 m) and heat pumps, radiant floor fan coil for the indoor and the provision of hot water. According to 1999 statistics, the civilian heating devices, heat pumps proportion of 96% in Switzerland, Austria, 38%, Denmark 27% .
 
The global application of heat pump case since 1995, produces around 59% of the growth rate of 9.7% annually in order to grow, most concentrated in the United States and Europe, others such as Japan and Turkey, heat pump unit installed capacity of about 6,875 MW, 2000 Nian Chu annual consumption of 23,287 TJ / year (6,453 GWh / year), the number of actual installation of about 500,000 units with a total capacity of about 12kW of heat pump machine is equivalent to 570,000 units, 12kW for the United States and some European countries the use of civilian-type heat pump specifications .
 
China is a continental climate, four distinct seasons, the winter cold period of the current value of the highly developed industrial and commercial, commercial office buildings and homes have been concentrated in the local building codes set out the need for air-conditioning heating, in which every winter under the terms must have a considerable energy consumption, the increasing shortage of crude oil and other energy sources today, heat pump heating is already mainstream technology.
 
From: baidu.news

Dec 3, 2009 at 07:55 o\clock

The concept of air water heat pump

by: zhonglv   Keywords: Air, Water, Heat, Pump

      A good solution for energy saving
     Chengda air water heat pump is anew generation heat pump product developed with the advanced heating technologies. The heat pump utilizes the energy from surrounding air and converts the energy to the hot water for house heating and domestic hot water supplying. The whole range of this heat pump is completed and strictly tested with our European partners, to make sure the best efficiency and quality to European market. especially for cold areas. With wide running temperature range from -15℃ to 40℃，keep supplying the warm water from 35℃ to 60℃(max), making you warm and comfortable life.
     All main components such as Copeland, Siemens, Danfoss, Wilo. All products offer maximum efficiency together with total reliability and manufactured to the highest quality standard.

 

 
      Outstanding performance
          o High efficiency and energy saving
          o R407C refrigerant
          o Maximun outlet water temperature up to 60℃
          o Stepped fan motor
          o Expansion valve keeps the most suitable refrigerant flow in any case
          o Water flow protection, high/low pressure protection, outlettemp protection etc, keeping the system safety.

     High Quality and reliability
          o stainless steel plate heat exchanger with maximum permitted pressure 40 bar
          o 100% stainless water circuit
          o Microprocessor control and error alarm and display
          o Compact design, easy installation and maintenance
          o World-known brand compressor, pump and main components

Flexible installation

Heat pumps are suitable for many different heating systems to heat the house or produce hot water.

     Connected with an exist boiler or replace the old electric/gas/oil heater.
     Installed for house heating and hot water supplying.
     Installed together with a solar heating system.
     Installed for swimming pool heating (closed water circuit)



From: china-heat-pump.com



Dec 2, 2009 at 04:15 o\clock

Multifunctional Heat Pumps

by: zhonglv   Keywords: heat, pump


Heat pump technology is closely watched around the world in recent years of new energy technologies.
By people familiar with the "pump" is a can increase the potential energy of the machinery and equipment, such as water pumps are mainly high water pumped from the low.
 
The "heat pump" is a natural from the air, water or soil to obtain low-grade heat energy, through electricity doing work, providing that can be used by people of high-grade heat energy devices. Heat pumps work as a natural phenomenon, as the flow of water from the lower height, as heat always flows from the high temperature low temperature zone. But people can create the machine, as the water from the lower elevated to high places and the use of pumps, as used heat pumps can pump heat from low to high temperature.

 
Therefore, to enhance the heat pump is essentially a device is the role of heat pumps absorb heat from the surrounding environment, and to pass it to the heated objects (temperatures higher objects), it works the same with the refrigerator are in accordance with reverse Carnot cycle work, the only difference lies in working temperature range is different. Heat pump at work, as part of its own consumption of energy, the energy stored in environmental media should be digging through the circulatory system to improve heat transfer working fluid temperature to use, but the entire heat pump power consumption of devices in the output power is only a small part of the Therefore, the use of heat pump technology can save a lot of high-grade energy.
 
In operation, evaporator to draw heat from the surrounding environment in order to evaporation refrigerants, refrigerant vapor compressed by the compressor temperature and pressure rise, high-temperature vapor condensed into liquid through the condenser, the release of heat transfer to the storage tank of water. After condensation heat transfer working fluid through the expansion valve back to the evaporator, and then by evaporation, so on ad infinitum.