This document is in response to a Geothermal Heat Pump Consortium (GEO) request for proposals, RFP 07-08-2011 #3 – Development of Job Descriptions for Personnel in GHP Systems. As clearly stated in the title, this project is to develop job descriptions for all primary personnel involved in the design and installation of geothermal heat pump (GHP) systems. This includes but is not limited to drillers; Heating, Ventilating, and Air Conditioning (HVAC) and refrigeration specialists; engineers; and inspector/regulators. The goal is to define each job and to provide a consistent basis for developing training and certification programs to help reduce the potential for improperly installed systems, and assure product quality and performance. The desired end result is to increase consumer confidence in the technology, thus increasing market segment for geothermal heat pump systems.
The fifteen (15) job descriptions developed through this contract with GEO are as follows and are attached to this summary report.
The complete job descriptions are available in Job Descriptions for Personnel in GHP Systems
GHP System Disciplines 07-06-2011
Responsibilities of Disciplines Involved in the Design, Installation, Commissioning, and Operation of Geothermal Heat Pump System
Note: Some personnel may perform one or more of the following tasks. For some projects, not all tasks will be needed.
Architect - design of overall project architectural considerations, including facility siting and use, aesthetics, regulatory compliance, etc.
GHP System Design Engineer - design and specification of the entire GHP system including both the ground heat exchanger or open loop well(s), and the balance of the GHP system; may subcontract appropriate tasks, for example:
Site Evaluator - investigation and evaluation of site environmental conditions, including one or more of the following: safety, regulatory due diligence, hydrogeology, water quality, aquifer temperature change, injection well and/or surface water discharge requirements, and potential impacts to other groundwater and/or GHP system users.
Ground Thermal Conductivity/Diffusivity Tester / Analyst – closed loop only – determination and/or verification and analysis of thermal properties of geological formations from short term field tests of previously installed vertical ground heat exchangers, drilling logs, etc.
Ground Heat Transfer Designer - design of one or more types of ground heat transfer, including:
Vertical Borehole Driller – closed loop only – construction of borehole(s) for vertical ground-coupled heat exchangers
Horizontal Directional Driller – closed loop only – construction of directional drilling for ground-coupled heat exchangers
Trencher / Excavator – construction of GHP system trenching and/or excavation
Loop Installer / Grouter – closed loop only – installation of one or more types of heat exchangers, including ground-coupled heat exchangers (vertical or horizontal), surface water heat exchangers, etc., as well as system integrity testing, flushing & purging, flow and balance testing
Water Well Designer – open loop only - design of production well(s) and wellfield operation, including well location(s), water quality and flow requirements for the GHP system.
Return (Recharge) Well Designer – open loop only - design of return (recharge) well(s) and the return well operation, including the evaluation of the potential for the precipitation of dissolved minerals and the deterioration of the recharge capacity over time.
Standing Column Well Designer – open loop only - design of standing column well(s) and wellfields, including water quality and flow requirements for the GHP system, and the potential use of bleed water to enhance performance.
Water Well Driller – open loop only - construction, development, completion and protection of physical water supply well, return well and/or standing column well.
Water Well Pump Installer – open loop only - sizing, installation, service, and repair of water well pumping systems and related GHP equipment.
Pipe / Tubing Technician - construction of approved pipe and connections (joints/headers/manifolds, etc.) to designated termination point (building wall, mechanical room, or flow center, etc.)
Mechanical System Installer - installation of interior GHP system, including heat pump equipment, pump system, forced air and/or water distribution systems, and associated control systems.
GHP System Commissioning Agent - verification of GHP system installation, functionality, and capability of being operated and maintained to perform in conformity with applicable regulations and contract specifications, in addition to the system design intent.
GHP System Operation and Maintenance Personnel - troubleshooting problems of GHP systems, repair or replacement of malfunctioned components, accomplishment of routine maintenance to keep GHP systems operating within design specifications.
GHP System Regulator – adoption and enforcement of regulations governing design, installation, operation and maintenance of GHP systems.
GHP System Trainer – delivery of training programs covering design, installation, operation and maintenance of GHP systems.
GHP System Discipline Classifications 07-06-2011
GHP System Design Engineer
Ground Thermal Conductivity/Diffusivity Tester / Analyst – closed loop only
Ground Heat Transfer Designer
Vertical Borehole Driller – closed loop only
Horizontal Directional Driller – closed loop only
Trencher / Excavator
Loop Installer / Grouter – closed loop only
Water Well Designer – open loop only
Return (Recharge) Well Designer – open loop only
Standing Column Well Designer – open loop only
Water Well Driller – open loop only
Water Well Pump Installer – open loop only
Pipe / Tubing Technician
Mechanical System Installer
GHP System Commissioning Agent
GHP System Operation and Maintenance Personnel
GHP System Regulator
GHP System Trainer