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Geothermal direct expansion heat pump system by Isabella

Geothermal direct expansion heat pump system wherein subterranean heat exchange tubes have an internal diameter to length ratio of between 1/4000 and 1/6000, with 5 tubes per ton of BTU capacity; where the interior air heat exchange tubes have 50% of the interior volume of the subterranean tubes.

Where the thermal expansion valve is sized to match the interior air handler capacity; where the receiver holds 75% to 95% of the total refrigerant volume; where a pump down sequence is employed on system shut down; where an oil trap is installed at the vapor line existing the subterranean heat exchange tubes; and where 4 refrigerant cut-off/isolation valves are installed for service convenience.

The compressor is usually driven by electric power, and constitutes the element which forces the refrigerant around the circulating heat transfer loop between the interior and the exterior of a building. It is also possible to include a pump for circulating refrigerant or water in a system utilizing a liquid fluid that does not change phase. Typically, electrically driven fans are provided to force air over the finned tube heat exchangers so as to reduce the amount of finned tubing necessary to effect the desired thermal transfer between the air and the refrigerant.

The recirculating refrigerant may, and generally does, undergo phase changes as part of the process. At appropriate temperature and pressure, the refrigerant can be boiled (vaporized) on the side of the loop where heat is to be extracted, and condensed back to a liquid on the side to which heat is to be released. The phase change process provides a concentrated and substantial transfer of thermal energy.

Although the idea of a heat pump is to carry thermal energy in the refrigerant at a temperature which is useful for heat transfer in a desired direction via heat exchangers, the thermal transfer efficiency across a heat exchanger is a function of difference in temperature. When the outdoor air temperature is low, it may be necessary to supplement the heat energy obtained from the outside air through the heat pump. Electrical resistance heating means or auxiliary fossil fuel burners or the like can be employed for this purpose. Heat pumps are optimally designed for particular ambient air temperature ranges and their efficiency of heating and/or cooling will be impaired if ambient temperatures occur outside of the heat pump design limits. For example, the efficiency of an air-to-air heat pump used for home heating is reduced at low outdoor temperatures and for home cooling is reduced at high outdoor temperatures.

Heat pumps are designed to operate within a range where it is always possible to achieve cooling, although cooling is not very efficient in hot areas where temperatures often exceed 100 F. On the other hand, for heating, at some minimum outdoor air temperature, the lowest temperature the evaporator can provide is so near to the ambient temperature that little if any heat transfer occurs. At this temperature (which varies with the heat pump but may be on the order of -4 C. or 25 F.), the power expended in running the compressor and an outdoor fan is generally greater than the value of the heat energy available from the outdoor air which is necessary to adequately heat the interior air of the building. In such cases, a controller associated with the heat pump, coupled to an outdoor temperature sensor, shifts the heating system to supplement the heat pump with electric resistive or fossil fuel heating when outdoor temperatures approach the minimum temperature limit, and may disable the heat pump entirely when the minimum temperature limit is reached.

Ground source/water source heat exchange healing/cooling systems typically utilize closed loops of tubing buried in the ground or placed in water, such as a lake. These closed loops may be installed in a variety of manners, including horizontal configurations or helical loops, as well as in vertical configurations usually consisting of elongated U-shaped tubes placed into holes drilled into the earth. These heat exchange loops may carry a water/anti-freeze mixture in a water source system, or a refrigerant in a direct expansion system.

Both water source systems and direct expansion systems utilize naturally occurring geothermal heat as a heat source in the winter and as a heat sink in the summer. In a water source system, water is either taken from, or circulated in, the ground, via coupled plastic tubing and a water pump, so as to effect a thermal heat exchange between the ground and the water. The water is then used to effect a thermal heat exchange with refrigerant in a heat pump system, which refrigerant is utilized to transfer heat to or from interior air, depending on operation in either the heating or cooling mode.

In a direct expansion system, the refrigerant in a heat pump system is circulated directly in the ground, typically via coupled copper tubing, so as to effect a thermal heat exchange with the earth, all absent the additional water heat exchange step inherent with a water source system, and absent the necessity to operate a water pump. The geothermally heated or cooled refrigerant is then utilized by the heat pump system to transfer heat to or from interior air. As a result of the elimination of a heat transfer step, and the elimination of a water pump, direct expansion systems are usually more efficient than water source systems.

Dayrelax began to design and manufacture heat pump air conditioner,With many obvious advantages of air source heat pump as attraction and many years of heating and cooling system technology as support.

Article Source: http://www.earticlesonline.com/Article/Geothermal-direct-expansion-heat-pump-system/876334

FEATURED PRODUCTS:

BRAND NEW WATTS INSTANT HOT WATER RECIRCULATING PUMP SYSTEM MODEL 500800
BRAND NEW WATTS INSTANT HOT WATER RECIRCULATING PUMP SYSTEM MODEL 500800
$0.99
Time Remaining: 4d 13h 39m

Watts 500 800 Whole House Instant Hot Water Recirculating System Pump
Watts 500 800 Whole House Instant Hot Water Recirculating System Pump
$239.99
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Metlund ACT DMAND STS 70T PF Hot Water Recirculating System Kit
Metlund ACT DMAND STS 70T PF Hot Water Recirculating System Kit
$429.00
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Metlund ACT DMAND STS 70T Hot Water Recirculating System
Metlund ACT DMAND STS 70T Hot Water Recirculating System
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Metlund ACT DMAND STS 02T PF Hot Water Recirculating System Kit
Metlund ACT DMAND STS 02T PF Hot Water Recirculating System Kit
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Metlund ACT DMAND STS 50T S 50T Hot Water Recirculating System
Metlund ACT DMAND STS 50T S 50T Hot Water Recirculating System
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Metlund ACT DMAND STS 50T PF S 50T PF Hot Water Recirculating System Kit
Metlund ACT DMAND STS 50T PF S 50T PF Hot Water Recirculating System Kit
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Metlund ACT DMAND STS 02T Hot Water Recirculating System
Metlund ACT DMAND STS 02T Hot Water Recirculating System
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A great place to shop for Hot Water Pump Recirculating System products is Amazon.

Soft Ice Active Therapy System Soft Ice Active Therapy System

List Price: $175.00
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Description

After Surgery Pain Relief! Comfortable, easy to use and portable.

Designed especially for after surgery when serious pain relief is required. Our unit delivers localized cold therapy to the patient either in home or during their hospital stay...

7L/min High Volume Small DC 12V Brushless Submersible Water/ oil Pump 7L/min High Volume Small DC 12V Brushless Submersible Water/ oil Pump

Sale Price: $22.50

 

Description

ThThis is a high quality made, small DC submersible water pump with high pressure output. It's built by a brushless motor so that it's more quiet and last longer than a non-brushless water pump. Plus,it will not generate any 'electric spark' (noise) like a brush type motor does so it's more safe to operate it where flammable gas may exists...

Grundfos 595916 1/25 Horsepower Comfort Series Recirculator Pump Grundfos 595916 1/25 Horsepower Comfort Series Recirculator Pump

List Price: $512.00
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Description

Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump (595916) The Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump is a Comfort Series Instant Hot Water System. Includes timer and line cord...

Grundfos 595926 Replacement Comfort Valve for UP Circulator Pumps Grundfos 595926 Replacement Comfort Valve for UP Circulator Pumps

List Price: $86.30
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Description

Grundfos Comfort Series Replacement Valve (595926) Replacement Comfort Valve for Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator. The Comfort Valve is installed under the sink at the fixture furthest from the water heater...

Watts 500800 Premier Hot Water Recirculation Pump, Blue Watts 500800 Premier Hot Water Recirculation Pump, Blue

List Price: $239.00
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Description

Whole House Hot Water Recirculating Pump, Recirculating Pump Mounts To The Hot Water Outlet On The Water Heater & The Sensor Valve Mounts Under The Furthest Lavatory In The House Run, Turns Plumbing Into A Re-Circulating Loop, Every Faucet Will Have Hot Water Instantly, On/Off Timer On Pump Activates The Pump When You Need Hot Water, Saves Over 10,000 Gallons A Year In Wasted Water, 120V Pump Motor With 10' Grounded Plug, Easy To Install.

Check out these fine shops that offer Hot Water Pump Recirculating System products:


Sunpentown SP-3619 Hot Water Pot


Sunpentown SP-3619 Hot Water Pot


$65.99


The SP-3619 hot water pot with dual pump system has a 3.6 liter capacity and provides hot water whenever you need it.

Sunpentown SP-3201 3.2 Liter Dual Pump Hot Water Dispenser


Sunpentown SP-3201 3.2 Liter Dual Pump Hot Water Dispenser


$50.99


Sunpentown's SP-3201 3.2 liter dual pump hot water dispenser keeps hot water within easy reach, placing hot drinks at your fingertips.

Sunpentown Hot Water Pot with Dual-Pump System


Sunpentown Hot Water Pot with Dual-Pump System


$94.56


The Sunpentown Hot Water Pot with Dual-Pump System (SP-3619) is an ideal companion for tea lovers or anyone who needs hot water handy. This hot water pot is user friendly - just add drinking water and the unit automatically turns on. One touch dispensing and spinnable bottom make the hot water pot even easier to use. This unit also features a second manual pump, enabling you to dispense water even when the power goes out. Micro-computerized dry-boil protection prevents overheating. Features include a stainless steel gall and a removable top lid for easy cleaning. Auto reboil and a manual re-boil button add utility. The dispenser is dry-out proof and has a water volume indicator window. Please note: This unit is not recommended for use at altitudes above 300 meters. (Pot may stay in boil status and not switch to keep warm mode.) Keeps Hot Water Handy: This hot water dispenser is perfect for tea lovers and those who need to keep hot water on hand Easy to clean: The stainless steel gall and removable top lid facilitate easy cleaning Dry-Out Proof: With a micro-computerized dry-boil prevention system, the dispensing pot will never dry out, so there's no need to worry about overheating

Crystal Quest CQP-WC-05903 Premium Ultra Filtration Water Dispenser


Crystal Quest CQP-WC-05903 Premium Ultra Filtration Water Dispenser


$759


Receive hot & cold water instantly with The Crystal Quest CQP-WC-05903 Premium Turbo Ultra Filtration water dispenser with a convenient point-of-use system.

Floral Pattern Hot Water Dispenser with Dual-Pump System (4.2L)


Floral Pattern Hot Water Dispenser with Dual-Pump System (4.2L)


$86.87


Always have hot water ready at your fingertips with this dual-pump hot water dispenser from Sunpentown. This dispenser features one-touch auto dispense and manual air pump that allows water to be dispensed even when power is cut off. Hot water dispenserColor: White/floralCapacity: 4.2 litersPower consumption: 700 WInput voltage: 120V/60Hz

Sunbeam 6131 Hot Water Dispenser


Sunbeam 6131 Hot Water Dispenser


$32.99


The Sunbeam Hot Shot 6131 hot water dispenser is perfect for small settings; ideal for dorms, kitchenettes, or small offices.

Sunpentown SP-5016 Hot Water Pot


Sunpentown SP-5016 Hot Water Pot


$68.24


Simply add hot water and the Sunpentown SP-5016 will do all the rest.

Primo 900179H Bottled Water Pump


Primo 900179H Bottled Water Pump


$27.99


The Primo 900179H bottled water pump offers an affordable way to enjoy fresh, clean, and great-tasting water from your office or home!

Sunbeam 6170 Hot Water Dispenser


Sunbeam 6170 Hot Water Dispenser


$31.99


The Sunbeam Hot Shot 6170 hot water dispenser is perfect for making instant foods and beverages. It's faster than a microwave and easy to use.

Clover B14A Hot and Cold Water Dispenser


Clover B14A Hot and Cold Water Dispenser


$234.48


This convenient water dispenser provides hot and cold water at just the right temperatures!

Oasis BSA1SHS Artesian Hot & Cold Water Dispenser


Oasis BSA1SHS Artesian Hot & Cold Water Dispenser


$299


The Oasis BSA1SHS Artesian Hot & Cold water dispenser provides piping hot and chilled water to homes and offices.

Primo 900135 Hot & Cold Bottled Water Dispenser


Primo 900135 Hot & Cold Bottled Water Dispenser


$224.95


Enjoy fresh water with the Primo 900135 hot & cold bottled water dispenser. Offering hot, cold, & cool water, it's easy convenience in a great design!

Hot Water On Demand System


Hot Water On Demand System


$276.94


Hot Water On Demand System Coleman Hot Water On Demand SystemThis portable and self-contained water heater provides hot water for cleaning, cooking, washing. It even makes water hot enough for a satisfying mug of tea, coffee or cocoa. Unit will typically make 40 gallons of warm or hot water on one full battery charge and a 16.4 oz. cylinder of propane. Features:Heats cold water to over 100* degrees F in less than five secondsFull size faucet fold into handleHeat up to 40 gallons of water with one compact Coleman 16.4 oz propane cylinder (Propane sold separately)For even more hot water, adapt to a bulk propane tank (Adapters and tank sold separately)Rechargeable 6 volt battery pumps the waterBattery can be recharged in the car or off of a household outletRecharge cords store inside the heaterSimple to maintain; clean the heater with a simple household solutionPortable, propane hot water system for outdoor use onlyGreat for emergency preparedness3 year warrantyMade in China

Stansport Sluice Box Header And Recirculating Pump - General Camping


Stansport Sluice Box Header And Recirculating Pump - General Camping


$199.99


The accessory you want when moving water is not available at your search siteDurable stainless steel header fits on your sluice boxSubmersible sump pump feeds water into boxFits Stansport 30&39;&39; and 50&39;&39; sluice boxes (sold separately)Uses 12-volt battery (sold separately)Keep searching that gold stream for gold even if the water goes down with the Stansport Sluice Box Header And Recirculating Pump. The tool you need when moving water is not available at your search site, this handy accessory fits Stansport&39;s 30&39;&39; and 50&39;&39; sluice boxes (sold separately). Powered by a 12V battery (sold separately), the package&39;s submersible sump pump feeds water into your sluice box to keep your search going. Durable stainless steel header. Manufacturer model : 584. The accessory you want when moving water is not available at your search siteDurable stainless steel header fits on your sluice boxSubmersible sump pump feeds water into boxFits Stansport 30amp;39;amp;39; and 50amp;39;amp;39; sluice boxes (sold s

Kalorik JK32207RS Cordless Electric Hot Water Kettle


Kalorik JK32207RS Cordless Electric Hot Water Kettle


$39.99


The Kalorik JK32207RS cordless electric hot water kettle quickly brings water to a boil to prepare tea, coffee, hot chocolate, and more!

Clover B7A Hot and Cold Water Dispenser


Clover B7A Hot and Cold Water Dispenser


$181.79


Enjoy chilled water or hot soups with the Clover B7A hot and cold water dispenser featuring an ultra-efficient condenser which operates very quietly.

Haier WDNS32BW Hot and Cold Water Dispenser


Haier WDNS32BW Hot and Cold Water Dispenser


$132.99


The Haier WDNS32BW hot and cold water dispenser features LED indicator lights, hot water child safety lock, and removable drip tray.

Clover B9A Hot and Cold Countertop Water Dispenser


Clover B9A Hot and Cold Countertop Water Dispenser


$176.95


Keep instant hot and cold water right by you while you work with the B9A countertop water dispenser!

Haier WDNSC145 Convertible Hot and Cold Water Dispenser


Haier WDNSC145 Convertible Hot and Cold Water Dispenser


$147.99


The WDNSC145 Haier convertible water dispenser provides hot and cold water and has the ability to convert from a tabletop unit to freestanding.

Aquaverve S2 Hot and Cold Water Dispenser


Aquaverve S2 Hot and Cold Water Dispenser


$969


The Aquaverve S2 hot and cold water cooler is constructed of high grade stainless steel and represents the top of the line in water dispensers.

Aquaverve Celsius Hot and Cold Water Dispenser


Aquaverve Celsius Hot and Cold Water Dispenser


$549


The Aquaverve Celsius hot and cold water dispenser features a unique fluted design and completely conceals unsightly water jugs.

Ragalta RWC320 Hot& Cold Water Dispenser


Ragalta RWC320 Hot& Cold Water Dispenser


$176.99


The Ragalta RWC320 hot and cold water dispenser uses compressor cooling power to dispense water that suits any refreshment need.

Clover B7A Hot and Cold Water Dispenser in Black


Clover B7A Hot and Cold Water Dispenser in Black


$181.79


The Clover B7A hot and cold water dispenser holds 5 gallon bottles and features an adjustable cold water thermostat.

Ragalta RWC120 Hot & Cold Countertop Water Dispenser


Ragalta RWC120 Hot & Cold Countertop Water Dispenser


$75.99


The Ragalta RWC120 hot and cold countertop water dispenser is perfect for homes and offices that can't accommodate full-sized water dispensers.

Oasis BPD1SHS Atlantis Hot & Cold Water Dispenser


Oasis BPD1SHS Atlantis Hot & Cold Water Dispenser


$269


Drink fresh, pure water on a regular basis! The Oasis BPD1SHS Atlantis hot & cold water dispenser provides great tasting water, perfect for any setting!

4405 Series Water System With Bypass 24 Volt Water System Pump


4405 Series Water System With Bypass 24 Volt Water System Pump


$155.94


4405 Series Water System With Bypass 24 Volt Water System Pump Flojet 4405 Series Water System with Bypass - 24 VOLT WATER SYSTEM PUMP

4405 Series Water System With Bypass 32 Volt Water System Pump


4405 Series Water System With Bypass 32 Volt Water System Pump


$161.94


4405 Series Water System With Bypass 32 Volt Water System Pump Flojet 4405 Series Water System with Bypass - 32 VOLT WATER SYSTEM PUMP

Other Products Purchased from this site:
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