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Comparing the Energy and Economic Performance of the NIST NZERTF Design across the Mixed-Humid Climate Zone

December 31, 2015

Author(s)

Joshua D. Kneifel, Eric G. O'Rear

Effect of Common Faults on the Performance of Different Vapor Compression Systems

December 31, 2015

Author(s)

Zhimin Du, Piotr A. Domanski, William V. Payne

The effect of faults on cooling capacity, COP, sensible heat ratio, and superheat/subcooling temperatures in five split and rooftop systems, which use different types of expansion devices, compressors and refrigerants, are separately compared and analyzed

Real-Time Energy Prediction for a Milling Machine Tool Using Sparse Gaussian Process Regression

December 28, 2015

Author(s)

Sudarsan Rachuri, Jinkyoo Park, Kincho Law, Raunak Binge, Mason Chen, David Dornfeld

This paper describes a real-time data collection framework and an adaptive machining learning method for constructing a real-time energy prediction model for a machine tool. To effectively establish the energy consumption pattern of a machine tool over

Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations

December 16, 2015

Author(s)

Heayoung Yoon, Paul M. Haney, Yohan Yoon, Sang M. An, James I. Basham, Nikolai Zhitenev

We investigate local carrier dynamics in n-CdS / p-CdTe solar cells, where the electron-hole pairs are generated by either near-field optical illumination or highly focused electron beam excitation. A focused ion milling process was used to prepare a

Combustion pathways of biofuel model compounds: A review of recent research and current challenges pertaining to first-, second-, and third-generation biofuels

December 9, 2015

Author(s)

Donald R. Burgess Jr., Carrigan J. Hayes, Jeffrey A. Manion

In this chapter, we present a review of recent research of interest to biofuel combustion. A brief overview of chemical kinetic mechanism development is provided. We then discuss experimental and computational studies of the pyrolytic and oxidative

Heat pump concepts for nZEB  Technology developments, design tools and testing of heat pump systems for nZEB in the USA, Country report IEA HPT Annex 40 Task 2, Task 3 and Task 4 of the USA

December 8, 2015

Author(s)

William V. Payne, Arthur H. Fanney, William M. Healy, Joshua D. Kneifel, Tania Ullah, Farhad Omar, Steven T. Bushby, Brian P. Dougherty, Dustin G. Poppendieck, Lisa C. Ng

The IEA HPT Annex 40 "Heat pump concepts for Nearly Zero Energy Buildings" deals with the application of heat pumps as a core component of the HVAC system for Nearly or Net Zero energy buildings (NZEB). This report covers Task 2 on the system comparison

Heat Pump Test Apparatus for the Evaluation of Low Global Warming Potential Refrigerants

November 12, 2015

Author(s)

Harrison M. Skye

International efforts to reduce man-made global warming include restrictions on the use of chemicals with a high global warming potential (GWP). The heating, ventilation, air- conditioning, and refrigeration (HVAC&R) industry subsequently faces a phasedown

A Self Learning Algorithm for Temperature Prediction in a Single Family Residence

September 29, 2015

Author(s)

Farhad Omar, Steven T. Bushby

In order to develop effective control optimization strategies to manage residential electricity consumption in a smart grid environment, predictive algorithms are needed that are simple to implement, minimize custom configuration, and provide enough

Self-Training of a Fault-Free Model for Residential Air Conditioner Fault Detection and Diagnostics

September 15, 2015

Author(s)

William V. Payne, Piotr A. Domanski, Jaehyeok Heo, Zhimin Du

This study is meant to be applied to residential, unitary, air-source, single-speed, vapor compression air-conditioning systems with nominal cooling capacities less than 19 kW (65,000 Btuh-1 or 5.4 tons). In this research, a method for self-training FDD

Hitting the bounds of chemistry: Limits and tradeoffs for low-GWP refrigerants.

August 19, 2015

Author(s)

Mark O. McLinden, J. Steven Brown, Andrei F. Kazakov, Piotr A. Domanski

We explore the possibilities for low-GWP refrigerants through two approaches. First, we explore the performance of hypothetical refrigerants to define the limits of what is allowed by thermodynamics. In the second approach, we apply property estimation

Kinetics of the Reactions of H and CH3 with n-Alkanes: Experiments with n-Butane and a Reevaluation Based on a Combustion Model Reaction Network Analysis

July 16, 2015

Author(s)

Jeffrey A. Manion, David A. Sheen, Iftikhar A. Awan

Presented is a combined experimental and modeling study of the kinetics of the reactions of H and CH3 with n-butane, a representative aliphatic fuel. Abstraction of H from n-alkane fuels creates alkyl radicals that rapidly decompose at high temperatures to

Benefits and Costs of Energy Standard Adoption in New Residential Buildings: National Summary

July 7, 2015

Author(s)

Joshua D. Kneifel, Eric G. O'Rear

A Generalized Data-Driven Energy Prediction Model with Uncertainty for a Milling Machine Tool using Gaussian Process

June 8, 2015

Author(s)

Jinkyoo Park, Raunak Bhinge, Nishant Biswas, Amrita Srinivasan, Kincho H. Law, David Dornfeld, Moneer Helu, Sudarsan Rachuri

Using a machine learning approach, this study investigates the effects of machining parameters on the energy consumption of a milling machine tool, which would allow selection of optimal operational strategies to machine a part with the minimum energy