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Overview

GLD provides designers with an advanced, comprehensive, easy-to-use and customizable engineering toolbox for optimizing ground source heat pump systems. Based on the published literature as well as on ASHRAE/ IGSHPA industry guidelines, GLD provides designers with confident design calculations for vertical, horizontal, surface water and hybrid systems.

Main Features (Slide Me!)

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Vertical System Design

Module The vertical module determines the depth, number and configuration of boreholes required for an optimal heat exchanger design. Providing simultaneous Design Day, Monthly and 8760 Hourly Analysis tools, the vertical module offers accuracy, flexibility and power.
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Horizontal System Design

Module The horizontal module calculates the required trench, pit, bore and pipe lengths for a wide range of horizontal configurations. The module provides both "fixed temperature" and "fixed area" design methods, offering designers a unique degree of power and control.
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Surface Water Design

Module The surface water module optimizes the pipe length and circuit number while ensuring the turbulent flow necessary for surface water heat exchangers. As with the other design modules, the surface water module provides superior design flexibility.
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Hybrid System Design

Toolset For some projects, a 100% geothermal system is not feasible. The hybrid design toolset enables a designer on an 8760 hourly basis to easily determine the load balance between geo and hybrid equipment and to size an efficient, cost effective loopfield.
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Building Loads

Management In addition to interfacing with industry leading building simulation tools, GLD also includes loads visualization, analysis and pump matching tools that help ensure proper loads management between the building and the loopfield.
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Piping Design

Module From the auto-design of headering systems and the calculation of purge pump requirements to the "what if" impact of manifold, vault and fluid selections on head loss, the piping system builder module is an essential tool for efficient loopfield performance.
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LifeCycle Costing

and C02 The Life Cycle Costing (LCC) module integrates building loads, loopfield lengths, heat pump performance and a range of other inputs (including emissions) to provide quick, accurate and custom Net Present Value (NPV) analysis reports.
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Heat Pump

Modeling Designers can choose from thousands of heat pump modeling curves from nearly two dozen manufacturers to ensure the highest levels of accuracy in the dynamic loopfield simulation process. The heat pump module also enables designers to enter new/custom pumps.
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Thermal Conductivity

Analysis The thermal conductivity analysis (or response) module is a comprehensive field test data analysis tool that reports thermal conductivity, thermal diffiusivity, undisturbed formation temperatures and borehole thermal resistance values.
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Import and Export

Capabilities GLD offers Import and/or export capabilities with a range of leading building energy simulation tools including public domain packages such as EnergyPlus as well as tools such as Trane Trace, Carrier HAP and the IES VE.
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International

Versions Engineers in more than 60 countries rely on GLD for their geothermal design work. Available in more than a dozen languages, GLD provides the global design community with multilingual options ranging from Chinese to Spanish. Contact us about your language.
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World Class

Support GLD customers receive world class support from our team of deeply experienced geothermal designers, installers, drillers, programmers and physicists. When you purchase GLD, you gain access to our global expert network.

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