The ORNL Modulating Heat Pump Design Tool -- Mark IV User's Guide

Rice, C Keith

doi:10.2172/814355

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…Annual, subhourly simulations were performed for the baseline system and AS-IHP for five locations: Atlanta, mixed-humid type climate; Houston, hot-humid; Phoenix, hot-dry; San Francisco, marine; and Chicago; cold. Annual simulations for the IHP systems required that HPDM (Rice and Jackson 2002) be integrated into the TRNSYS simulation system as described earlier in this chapter.…”

Section: Analysis Approach and Resultsmentioning

confidence: 99%

“…This same program was used to calculate the delivered capacities of the cooling and water heating coils, calculate the heat losses and gains and pressure losses in the connecting lines, and to deduce the airflows across the outdoor coil at various fan speeds from the condenser energy balance. The detailed results from the data reduction programs were used to calibrate the predictions of the ORNL HPDM (Rice and Jackson 2002) for the range of space cooling and water heating tests performed.…”

Section: Model Validationmentioning

confidence: 99%

See 1 more Smart Citation

Air-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Murphy¹,

Rice²,

Baxter³

et al. 2007

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Section: Analysis Approach and Resultsmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

Air-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Murphy¹,

Rice²,

Baxter³

et al. 2007

View full text Add to dashboard Cite

“…Annual, sub-hourly simulations were performed for the baseline system and AS-IHP for five locations: Atlanta, mixed-humid type climate; Houston, hot-humid; Phoenix, hot-dry; San Francisco, marine; and Chicago, cold. Annual simulations for the IHP systems required that HPDM (Rice and Jackson 2002) be integrated into the TRNSYS simulation system as described earlier in this section.…”

Section: Analysis Approach and Resultsmentioning

confidence: 99%

Ground-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Murphy¹,

Rice²,

Baxter³

et al. 2007

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“…In early 2008 CM and ORNL began a series of GS-IHP system design iterations using results of lab tests performed by CM to calibrate the variable-speed research version of the DOE/ORNL heat pump design model (HPDM) (Rice 1991). The process is documented by Rice, et al (2013) and summarized in this subsection.…”

Section: First Generation Prototype Developmentmentioning

confidence: 99%

Ground Source Integrated Heat Pump (GS-IHP) Development

Baxter¹,

Rice²,

Murphy³

et al. 2013

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ORNL and ClimateMaster, Inc. (CM) engaged in a Cooperative Research and Development Agreement (CRADA) to develop a groundsource integrated heat pump (GS-IHP) system for the US residential market. A initial prototype was designed and fabricated, lab-tested, and modeled in TRNSYS (SOLAR Energy Laboratory, et al, 2010) to predict annual performance relative to 1) a baseline suite of equipment meeting minimum efficiency standards in effect in 2006 (combination of air-source heat pump (ASHP) and resistance water heater) and 2) a state-of-the-art (SOA) two-capacity ground-source heat pump with desuperheater water heater (WH) option (GSHPwDS). Predicted total annual energy savings, while providing space conditioning and water heating for a 2600 ft 2 (242 m 2 ) house at 5 U.S. locations, ranged from 52 to 59%, averaging 55%, relative to the minimum efficiency suite. Predicted energy use for water heating was reduced 68 to 78% relative to resistance WH. Predicted total annual savings for the GSHPwDS relative to the same baseline averaged 22.6% with water heating energy use reduced by 10 to 30% from desuperheater contributions.The 1 st generation (or alpha) prototype design for the GS-IHP was finalized in 2010 and field test samples were fabricated for testing by CM and by ORNL. Two of the alpha units were installed in 3700 ft 2 (345 m 2 ) houses at the ZEBRAlliance site in Oak Ridge and field tested during 2011. Based on the steady-state performance demonstrated by the GS-IHPs it was projected that it would achieve >52% energy savings relative to the minimum efficiency suite at this specific site. A number of operational issues with the alpha units were identified indicating design changes needed to the system before market introduction could be accomplished. These were communicated to CM throughout the field test period.Based on the alpha unit test results and the diagnostic information coming from the field test experience, CM developed a 2 nd generation (or beta) prototype in 2012. Field test verification units were fabricated and installed at the ZEBRAlliance site in Oak Ridge in May 2012 and at several sites near CM headquarters in Oklahoma. Field testing of the units continued through February 2013. Page 2 of 38Annual performance analyses of the beta unit (prototype 2) with vertical well ground heat exchangers (GHX) in 5 U.S. locations predict annual energy savings of 57% to 61%, averaging 59% relative to the minimum efficiency suite and 38% to 56%, averaging 46% relative to the SOA GSHPwDS. Based on the steady-state performance demonstrated by the test units it was projected that the 2 nd generation units would achieve ~58% energy savings relative to the minimum efficiency suite at the Zebra Alliance site with horizontal GHX.A new product based on the beta unit design was announced by CM in 2012 -the Trilogy 40 ® Q-mode™

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The ORNL Modulating Heat Pump Design Tool -- Mark IV User's Guide

Cited by 7 publications

References 4 publications

Air-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Air-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Ground-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

Ground Source Integrated Heat Pump (GS-IHP) Development

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