Modeling and control of geothermal heating systems

Journal Article · Thu Jan 01 00:00:00 EST 1981 · ISA Trans.; (United States)

OSTI ID:5899589

Simmons, G M; Ali, S I; Batdorf, J A

A single duct space heating system, with variable air volume units, has been modeled for a geothermally heated agriculture office building. The heating system response, under transient load conditions, has been determined for various control strategies. To do so, a representative cold day had been defined, and a solar input transient had been included, as were the energy inputs from interior lighting and building occupants. The control options discussed include the following: (1) the elimination of night set-back (2) the action of the zone comparator to decrease water flow in the primary heater with a subsequent increase in fresh air flow as required (3) the use of a heating coil on a fresh air intake, which could reduce the overall geothermal demand by at least 10% (4) the regulation of the total loop water flow rather than the use of the 3-way mixing valves and (5) the minimization of the loop water temperature, which could be achieved by using ambient reset control for systems having large fresh air intakes. Most recommended modifications would result in overall saving of at least 20-30%.

• Research Organization: Idaho University, Moscow, ID
• OSTI ID: 5899589
• Report Number(s): CONF-801014-
• Journal Information: ISA Trans.; (United States), Vol. 20:1; Conference: Instrument Society of America conference, Houston, TX, USA, 20 Oct 1980
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
GEOTHERMAL HEATING SYSTEMS
MATHEMATICAL MODELS
TEMPERATURE CONTROL
OFFICE BUILDINGS
GEOTHERMAL SPACE HEATING
DESIGN
GEOTHERMAL RESOURCES
HEAT STORAGE
MODIFICATIONS
BUILDINGS
CONTROL
ENERGY STORAGE
ENERGY SYSTEMS
GEOTHERMAL HEATING
HEATING
HEATING SYSTEMS
RESOURCES
SPACE HEATING
STORAGE
151000* - Geothermal Energy- Direct Energy Utilization