Residential Geothermal Systems: Heating and Cooling Using the Ground Below
Librería en AbeBooks desde: 21 de mayo de 2012Cantidad: 20
Imagen del editor
Librería en AbeBooks desde: 21 de mayo de 2012Cantidad: 20
Título: Residential Geothermal Systems: Heating and ...
Editorial: Pangea Publications LLC
Condición del libro:New
Tipo de libro: Paperback
NEW EXPANDED EDITION with color illustrations and spacious 8.5 x 8.5 format adds detailed descriptions of the components of the heat pump, open loops systems and important decisions that the homeowner must make.
Interest in residential geothermal systems has grown as more people realize they can replace their fossil-fuel heating system with one that is three to five times more efficient and doesn't require a chimney to exhaust noxious fumes. Currently in the USA there is a federal 30% tax credit that applies to the total installation cost. These newer, safer systems provide heating as well as cooling simply by transferring heat between the home and the ground or a nearby body of water. Since this is a relatively new technology, the number of experienced installers is limited, but growing. Therefore, there is a burden on homeowners interested in installing one of these systems to absorb as much information about residential geothermal systems as possible. This book was written specifically to meet that need as well as to help HVAC professionals who are new to residential geothermal systems.
Readers will learn how heat pumps are able to extract heat from relatively low temperature water circulating in ground loops and raise it to a temperature high enough to heat a home. They will also learn how to estimate the size of the heat pump required and the ground loop size as well for straight 2-pipe, 4-pipe, 6-pipe and Slinky loop configurations. This is important in order to verify that the installer correctly sizes the system. An incorrectly sized system will result in an unhappy homeowner. Both horizontal and vertical loop systems, for GX and DX, are covered.
Some of the technical issues that are addressed include: Loop water flow rates and Reynolds Number, heat of extraction/rejection, heating capacity, desuperheater setup, open-loop/closed-loop, SCW, pond loops, DX, Manual-J, COP. The final chapter consists of a set of flowcharts guiding the homeowner to ask the pertinent questions needed for a successful installation.From the Author:
CONTENTS (75 Color illustrations and charts, wide 8.5" x 8.5" format)
About This Book
1 ~ THE FURNACE BELOW Rise in Price of Oil in Last Decade | Source of Geothermal Energy | Geothermal Gradient | Avg. Annual Earth Temp. | Geothermal Acronyms | Geothermal Advantages | Geothermal Disadvantages
2 ~ WHAT'S IT ALL ABOUT? Fossil Fuels' Heating Capacity | Geo vs. Conventional System | 30% Federal Tax Credit | COP-the Efficiency of a Geo-system | Sizing the Heat Pump for Heating | Design Heat Load | Insulate First! | Homeowner Estimate of Heat Load | Comparison of Electric Heat Backup Cost vs. Geo | Importance of not being Short-Looped | R-values of Insulating Materials | Sensible & Latent Heat | Infiltration Loss | Block Load Calculation | Manual-J Calculation/Software | Design Cooling Load | Heat Gain | Fuel Usage Comparison: Geo vs. Fossil Fuel
3 ~ BASIC GROUND LOOP SYSTEMS A Primitive Loop System | Shortcoming of Primitive Loop System | Overview of Loop Systems | Ground Coupled Loop Systems | Horizontal Straight & Slinky Design |Vertical Ground Coupled Loop Systems | Ground Water Coupled Loop Systems-Singlet, Doublet and SCW | Surface Water Coupled Loop Systems | Direct Exchange (DX) Systems
4 ~ THE REFRIGERATOR The Icebox and Latent Heat of Fusion |Latent Heat of Vaporization | Components of A Refrigerator-Evaporator, Compressor, Condenser & Capillary Tube |Operation of a Refrigerator | A Refrigerator is a Heat Pump! | The 3 Rules that Apply to All Heat Pumps
5 ~ THE GEOTHERMAL HEAT PUMP The Primitive Loop Enhanced | Water-to-Air Systems | Hydronic (Water-to-Water) Systems | Ductless Mini-Split Systems | Heat Pump Selection Criteria | Electrical Cost to Run Heat Pump | Heat Pump Installation | Desuperheater..Free Hot Water? | Guideline For Desuperheaters | Plumbing Setup with/without Buffer Tank | 7 Primary Hot Water Heaters that can be used with Desuperheater | Auxiliary Heat Strips and Balance Point | Thermostats-Set It and Forget It | Maintenance of Heat Pumps | Annual System Inspection Report | Heat Pump Components | Air Handler Coil | Formicary Corrosion | Water/Refrigerant Heat Exchange Coil | Accumulator | Filter-drier | Thermostatic Expansion Valve (TXV) | Reversing Valve | Compressor-Scroll Type | Heat Pump Problems and Causes | Heat Pump Performance | Heat of Extraction/Rejection | Heating Capacity
6 ~ THE HORIZONTAL GROUND LOOP High Density Polyethylene (HDPE) | Fusion Welding | Thermal Conductivity of Ground Materials | The Straight Single Loop | Multiple Straight Loops in Series | Multiple Straight Loops in Parallel | Slinky Loop Design | Spiral Loop | Sizing a Closed Horizontal Loop | Ground Conductivity Factor | Trench Length per Ton | No. of Parallel Loops/Heat Pump |Laminar vs. Turbulent Flow | Example of Reynolds No. Calculation | Reynolds No. for Various Pipe Sizes/Flow Rates | Water Viscosity Variation with Temp. | Horizontal Loop Boring | Use of a Drip Hose on a Loop Field | Underground Earth Temp. Variation | Antifreeze-Methanol & Glycols,% Needed | Loop Headers and Manifold | Reverse Return Loop Plumbing | Loop Flow Center | Size and No. of Loop Pumps Needed | Pond Loops-Slinky/Matt & Coiled Loop
7 ~ THE VERTICAL GROUND LOOPVertical Loop Basics | Borehole Depth/Ton | Conductivity and Diffusivity of Soil Types |Borehole Conductivity Testing | Sizing Vertical Boreholes | Borehole Depth/Ton for 3/4",1" & 1 1/4" Pipe | Ground and Annulus Conductivity Adjustment | Vertical Loop Configuration | Grouting Borehole-GeoClips | Flushing and Purging-Purge Cart | Antifreeze %
8 ~ OPEN LOOP SYSTEMS Doublet (2 Wells-Production & Injection) | Pressure Tank | Solenoid Valve | Calculation of Well Pump Size | Best Efficiency Point of Pump | Pitless Adaptor | Torque Arrestor | Singlet (1 Well) | Pump and Dump
9 ~ STANDING COLUMN WELLLarger Well Size Needed | Underground Condition Required | Bleeding | Advection | Porter Shroud
10 ~ (DX) DIRECT EXCHANGE SYSTEMWater/Refrigerant Heat Exchange Interface Not Needed | Sacrificial Anode | Comparison To Water (GX) Systems | Vertical DX Systems | Depth/Ton Needed | Borehole Separation & Thermal Interference | Horizontal DX Systems | Cathode Protection System | Ground Acidity (pH) Consideration | Potential (Refrigerant) Problems
11 ~ MANUAL-J Description Of | Why it is Mandatory | Sample Manual-J Report | System Performance Bin Data | Terminology of Manual-J Report | Cost of Geo-system: Ductwork-Heat Pump-Optional Equip.
12 ~ HOMEOWNER'S DILEMMAS What Size Heat Pump? | Problems Downsizing to Smaller Heat Pump | Analysis of a 4 Ton vs. 3 Ton Heat Pump | Horizontal or Vertical Ground Loop? | Single Deep Borehole or Multiple Shallower Boreholes? | Comparison of a Single 450' Borehole vs. 3 150' Boreholes | Heat Pump Systems: Package-Split Units-Ductless Mini-split | Water-to-Air or Water-to-Water (Radiant) System?
13 ~ FINAL STEPS 8 Full Page Flowcharts Summarizing The Questions to be Asked and Tasks to be Performed by the Homeowner Planning to Install a Geo-system.
Average Annual Ground Temp. in US, Canada, Australia and Europe |
Heat Capacities of Various Substances |
Heat Pump Manufacturers: DX- Split-Packaged Units |
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