Urbana, IL, United States
Urbana, IL, United States

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Newell T.,Newell Instruments Inc. | Newell T.,University of Illinois at Urbana - Champaign | Newell B.,Newell Instruments Inc.
ASHRAE Journal | Year: 2011

Thermal mass of a the Equinox House and the Washburne Trade School passive solar house, located in Chicago, is an important design consideration for energy and to maintain comfort. For Equinox House, with a UA value of approximately 100 W/K and the estimated window UA for the Washburne house was 197 W/K. The very high thermal time constant of Equinox House relies on additional mass to increase the time constant. Here, thermal mass also helps stabilize temperatures of a house, which creates a better feeling of comfort. The measurements in the Washburne house showed uncomfortable temperatures almost 30% of the time in December. With engineering analyses included in the architectural design process, an inherently massive house that results in comfort and excellent energy performance can be achieved.


Newell T.,Newell Instruments Inc. | Newell B.,Newell Instruments Inc. | Newell B.,University of Illinois at Urbana - Champaign
ASHRAE Journal | Year: 2011

Equinox House in Las Vegas has installed comfort conditioning system in order to achieve net zero energy. Two 1,500 W electric heaters are used for supplementing the air source heat pump during times with low ambient air temperatures. The air source heat pump consists of a variable speed compressor. The balanced ventilation system consists of two duct fans with a flow of 100 L/s (210 cfm) that provides fresh air to the house for one hour out of every three hours. The ventilation system is designed such that fresh air is supplied to the living areas of the house, and return air to be exhausted from the house is pulled from the kitchen, laundry room and bathrooms. During the winter, sensible heating capacity is significantly lower in Equinox House with the most extreme weather only requiring the equivalent of two hairdryers to maintain comfortable temperatures. The VOC sensor saturates above 2,000 ppm and has a base level of approximately 390 ppm, which represents a nominal outdoor air background level of VOCs.


Newell T.,University of Illinois at Urbana - Champaign | Newell T.,Newell Instruments Inc. | Newell B.,Newell Instruments Inc.
ASHRAE Journal | Year: 2011

Equinox House is demonstrating that solar can meet residential living needs. The house is a good example of an economical, energy efficient and comfortable dwelling. Other construction techniques and system designs also can achieve similar levels of performance. Designers have used a life-cycle cost analysis to determine the thickness of structural insulated panels (SIPs) for walls and roof of the house. Their analysis has found that 200 mm to 400 mm insulation thickness for walls and roof will have similar economic performance. The lifetime used in the cost analysis is an important factor for the durability of the house and improving its living conditions. The window design analysis for Equinox House has examined the performance and cost of windows with transmission and loss characteristics typical of good and superior windows. The analysis has found that windows do not decrease the life-cycle cost of a residence. Solar photovoltaic system (PV) panels are more cost efficient than windows.


Patel T.,Urbana University | Mitsingas C.,Urbana University | Miller J.P.,U.S. Army | Newell T.A.,Newell Instruments Inc.
ASME 2011 5th International Conference on Energy Sustainability, ES 2011 | Year: 2011

Tracer gas and blower door testing are two widely used methods to determine the rate of air infiltration through a building envelope. Blower door testing is performed at elevated pressure differentials across the building envelope whereas tracer gas testing is conducted at near zero differential pressures, better reflecting the air leakage rate at near normal building operating conditions. The primary objective of this study was to determine whether extrapolation of blower door test data to normal building operating conditions provides a good estimate of annual average air infiltration at those conditions. Two methods were used to extrapolate the data and were then compared to the baseline tracer gas tests. A secondary objective was to determine the ventilation rate of a residential facility using tracer gas tests. Tracer gas testing seems to be more reliable in determining the air leakage rate at normal operating pressures, but is sensitive to the tracer gas and ambient weather conditions. Regardless, for the subject facility, the ACH50/20 rule and Sherman's ACH50/N correlation, extrapolated from the blower door tests, are within 6%-33% and 4%-38% of the tracer gas results, respectively. However, these errors are dependent on the assumptions used. Nevertheless, it appears that simple blower door testing can provide a reasonable measure of a building's annual average air infiltration rate regardless of ambient conditions, whereas the more expensive and complex tracer gas tests may better reflect seasonal variations in air infiltration rates. Copyright © 2011 by ASME.


Newell T.,Newell Instruments Inc. | Newell B.,Newell Instruments Inc.
ASHRAE Journal | Year: 2011

In this article, we examine the impact of appliances on Equinox House. Energy requirements of high efficiency homes are dominated by humans and their activities rather than climate. Equinox House, for example, would only require one-third of its annual energy to maintain comfort conditions without people and their appliances. The operation of appliances and comfort conditioning systems are intertwined in high performance homes. Baking a turkey at Thanksgiving is sufficient to keep Equinox House comfortable for a day with freezing temperatures outside.


Newell T.,Urbana University | Newell B.,Newell Instruments Inc.
ASHRAE Journal | Year: 2011

Significant amount of data has been collected from Equinox House to evaluate its actual performance. The data is used to examine the energy use in the house from December 2010 till April 2011 and compare the actual energy use to predicted energy requirements. The energy use is also divided into different categories for the same time period to examine the variability and trends. The researchers also monitor energy used for lights, cooking, dishwashing, clothes washing and drying and all other house loads. Their computerized circuit breaker panel allows them to monitor and control all circuits in the house and provides circuit protection. A wireless cell phone Internet connection provides the researchers with remote control and monitoring capability. An adjacent subpanel contains two sets of circuits that are ganged together and connected to two circuits in the computerized circuit panel. The subpanel circuits are primarily miscellaneous circuits such as bedroom, bathroom, hallway, garage and exterior electrical receptacles and lights.


Newell B.,Newell Instruments Inc. | Long A.,Newell Instruments Inc. | Newell T.,Newell Instruments Inc. | Newell T.,Urbana University
ASHRAE Transactions | Year: 2011

A microchannel evaporator with relatively densely spaced thin fins has been developed for domestic refrigerators. Experimental test results in an 18 cubic foot (510 liter) top mount refrigerator produced equivalent performance to that of the original fin-tube evaporator. The prototype evaporator constructed with copper microchannel tubing and copper fin stock has an equivalent mass to the original aluminum tube-fin evaporator it replaced. The microchannel evaporator was found to reduce the refrigerator's refrigerant charge by 60% of the original refrigerant charge. Frost studies indicate good performance with more than 200 grams of accumulated frost. Test results showing the refrigerator's performance at low, medium and high ambient temperatures, varying refrigerant charge levels and the effect of frost are included in the presentation.


Trademark
Newell Instruments Inc. | Date: 2013-05-14

HVAC units.

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