Monitoring techniques for the Net-Zero Energy Residential Test Facility

Davis, Mark W.; Healy, William M.; Boyd, Matthew; Ng, Lisa C.; Payne, Vance; Skye, Harrison M.; Ullah, Tania

doi:10.6028/nist.tn.1854

Cited by 17 publications

(32 citation statements)

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“…Each electrical circuit was carefully planned so that the electrical use of individual devices could be measured independently using instrumentation embedded in circuit breakers. Davis et al [10] give a detailed overview of the overall monitoring architecture, sensors used, and the resulting measurement uncertainties associated with the electrical measurements. The electrical system incorporates a computercontrolled load control panel to switch on and off circuits throughout the house.…”

Section: Electrical Distribution Systemmentioning

confidence: 99%

“…In the cooling mode, the thermostat is set such that the dehumidification mode of the heat pump unit is activated if the relative humidity reaches 50%. The instrumentation, data acquisition system, and measurement uncertainty associated with the heat pump system, as well as all other electrical/mechanical subsystems within the NZERTF are described in detail by Davis et al [10].…”

Section: Air-to-air Heat Pump Systemmentioning

confidence: 99%

“…The hot water leaving the solar storage tank enters a thermostatic mixing valve, set at 49C, before entering the downstream heat pump water heater. Temperature and flow measurements are made at multiple locations, as noted in Davis et al [10].…”

Section: Solar Hot Water Systemmentioning

confidence: 99%

“…In the "Hybrid" mode with a set-point temperature of 57C and an ambient temperature of 20C, the manufacturer-reported Energy Factor (EF), COP and standby loss of the unit are 2.5, 2.6, and 0.20C/h, respectively. In addition to monitoring the power consumption of the heat pump water heater, other measurements include the inlet and outlet water temperatures of the heat pump water heater and the volume of water leaving the heat pump water heater [10].…”

Section: Heat Pump Water Heating Systemmentioning

confidence: 99%

See 3 more Smart Citations

Net-zero and beyond! Design and performance of NIST's net-zero energy residential test facility

Fanney

Payne

Ullah

et al. 2015

Energy and Buildings

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Section: Electrical Distribution Systemmentioning

confidence: 99%

Section: Air-to-air Heat Pump Systemmentioning

confidence: 99%

Section: Solar Hot Water Systemmentioning

confidence: 99%

Section: Heat Pump Water Heating Systemmentioning

confidence: 99%

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Net-zero and beyond! Design and performance of NIST's net-zero energy residential test facility

Fanney

Payne

Ullah

et al. 2015

Energy and Buildings

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“…The reader is referred to the resources listed in Table 1 Measurement approaches employed in the facility: Davis et al 2014 [8] The data website contains a data dictionary that includes two main parts. Part I of this data dictionary lists a table of characteristics of the NZERTF that are consistent with the taxonomy provided by the U.S. Department of Energy's Building Energy Performance Taxonomy, Version 2.1 [9].…”

Section: Methodsmentioning

confidence: 99%

Performance Data from the NIST Net-Zero Energy Residential Test Facility

Healy¹,

Fanney²,

Dougherty³

et al. 2017

J. RES. NATL. INST. STAN.

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SummaryData were collected over two separate year-long test periods at the Net-Zero Energy Residential Test Facility, a laboratory designed to evaluate a variety of technologies and operational strategies that lead to energy efficient houses with comfortable and healthful indoor environments. In a net-zero energy building, all energy consumption over the course of a year is offset by on-site renewable energy production; this facility attempts to meet that goal through use of a photovoltaic array installed on the roof. Data are presented for one-year test periods over which the research team examined whether the facility would reach net-zero status. In both years, the house was operated in an all-electric configuration, with slight modifications made in the second year related to control schemes and equipment selection. A virtual family of four was simulated to carry out the operations that would typically occur in a home (e.g., appliance usage, lighting usage, hot water usage). Data are being released for the second year of operation at the time of publication of this document, with an expectation that data from the first year will be released at a later date.Data are captured as a time series where one data element is acquired every minute from each of 379 parallel data channels; these channels record a variety of quantities that are critical to evaluating the performance of the building. Among those quantities are: room temperatures, room relative humidities, electricity consumption by various devices, photovoltaic energy generation, outdoor conditions, operational status of devices, water temperatures, water flow rates, and airflow rates. Specifications are provided to fully describe the facility and its components, and an accompanying link provides design drawings and a data dictionary with key metadata for each of the channels.

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Selecting HVAC systems to achieve comfortable and cost-effective residential net-zero energy buildings

2018

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HVAC is responsible for the largest share of energy use in residential buildings and plays an important role in broader implementation of net-zero energy building (NZEB). This study investigated the energy, comfort and economic performance of commercially-available HVAC technologies for a residential NZEB. An experimentally-validated model was used to evaluate ventilation, dehumidification, and heat pump options for the NZEB in the mixed-humid climate zone. Ventilation options were compared to mechanical ventilation without recovery; a heat recovery ventilator (HRV) and energy recovery ventilator (ERV) respectively reduced the HVAC energy by 13.5 % and 17.4 % and reduced the building energy by 7.5 % and 9.7 %. There was no significant difference in thermal comfort between the ventilation options. Dehumidification options were compared to an air-source heat pump (ASHP) with a separate dehumidifier; the ASHP with dedicated dehumidification reduced the HVAC energy by 7.3 % and the building energy by 3.9 %. The ASHP-only option (without dedicated dehumidification) reduced the initial investment but provided the worst comfort due to high humidity levels. Finally, ground-source heat pump (GSHP) alternatives were compared to the ASHP; the GSHP with two and three boreholes reduced the HVAC energy by 26.0 % and 29.2 % and the building energy by 13.1 % and 14.7 %. The economics of each HVAC configuration was analyzed using installation cost data and two electricity price structures. The GSHPs with the ERV and dedicated dehumidification provided the highest energy savings and good comfort, but were the most expensive. The ASHP with dedicated dehumidification and the ERV (or HRV) provided reasonable payback periods.

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Monitoring techniques for the Net-Zero Energy Residential Test Facility

Cited by 17 publications

References 1 publication

Net-zero and beyond! Design and performance of NIST's net-zero energy residential test facility

Net-zero and beyond! Design and performance of NIST's net-zero energy residential test facility

Performance Data from the NIST Net-Zero Energy Residential Test Facility

Selecting HVAC systems to achieve comfortable and cost-effective residential net-zero energy buildings

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