Publications

Development of a range-extended electric vehicle powertrain for an integrated energy systems research printed utility vehicle

Journal: Applied Energy

Rapid vehicle and powertrain development has become essential to for the design and implementation of vehicles that meet and exceed the fuel efficiency, cost, and performance targets expected by today’s consumer while keeping pace with reduced development cycle and more frequent product releases. Recently, advances...

A modeling framework for optimal energy management of a residential building

Journal: Energy and Buildings

Residential buildings are currently equipped with energy production facilities, e.g., solar rooftops and batteries, which in conjunction with smart meters, can function as smart energy hubs coordinating the loads and the resources in an optimal manner. This paper presents a mathematical model for the optimal energy...

Preliminary Results from Electric Arc Furnace Off-Gas Enthalpy Modeling

Journal:

This article describes electric arc furnace (EAF) off-gas enthalpy models developed at Oak Ridge National Laboratory (ORNL) to calculate overall heat availability (sensible and chemical enthalpy) and recoverable heat values (steam or power generation potential) for existing EAF operations and to test ORNL’s new...

Evaluation of “Autotune” calibration against manual calibration of building energy models

Journal: Applied Energy

ORNL’s Autotune building energy model calibration software, used to inform contractors to make smarter retrofit decisions, created models that beat the industry’s energy efficiency standards.  (hi-res image) This paper demonstrates the application of Autotune, a methodology aimed at automatically...

Space Cooling in the United States: A Market Deep Dive

Journal: HPC newsletter

The slow pace of Pumped Storage Hydropower development in the US over the past twenty years has led to widespread interest in the feasibility and viability of alternative PSH designs, development schemes, and technologies. Since 2011, Oak Ridge National Lab has been exploring the economic viability of modular...

A Simulation-Based Study on Different Control Strategies for Variable Speed Pump in Distributed Ground Source Heat Pump Systems

Journal: ASHRAE Transactions

Most commercial ground-source heat pump (GSHP) systems in the United States are in a distributed configuration. These systems circulate water or an anti-freeze solution through multiple heat pump units via a central pumping system, which usually uses variable-speed pumps. Variable speed pumps have potential to...

Thermal Analysis of of Near-Isothermal Compressed Gas Energy Storage System

Journal: Applied Energy

Due to the increasing generation capacity of intermittent renewable electricity sources and an electrical grid ill-equipped to handle the mismatch between electricity generation and use, the need for advanced energy storage technologies will continue to grow. Currently, pumped-storage hydroelectricity and...

Additive Manufacturing Integrated Energy - Enabling Innovative Solutions for Buildings of the Future

Journal: Journal of Solar Energy Engineering

The AMIE (Additive Manufacturing Integrated Energy) demonstration utilized 3D printing as an enabling technology in the pursuit of construction methods that use less material, create less waste, and require less energy to build and operate. It was developed by Oak Ridge National Laboratory (ORNL) in collaboration...

A Field Study Setup of Four Homes Having Non-Ventilated and Semi-Conducted Sealed Attics

Journal: Journal of Green Building

The University of Florida (UF) and the Oak Ridge National Laboratory (ORNL) are evaluating the hygrothermal (heat and moisture flow) performance and durability of sealed attic construction where open cell spray polyurethane foam (ocSPF) insulation is applied directly to the underside of the roof deck. During the...

Insulation materials for commercial buildings in North America: An assessment of lifetime energy and environmental impacts

Journal: Energy and Buildings

In the United States, commercial buildings accounted for about 19% of the total primary energy consumption in 2012. Further, 29% of the ‘site’ energy in commercial buildings was consumed for space heating and cooling. Applying insulation materials to building envelopes is an effective way of reducing energy...

Investigation of the proposed solar-driven moisture phenomenon in asphalt shingle roofs

Journal: Journal of Building Physics

Unvented attics are an energy-efficiency measure to reduce the thermal load of the conditioned space and decrease the space conditioning energy consumption by about 10%. This retrofit is usually done by spraying polyurethane foam underneath the roof sheathing, and on the gables and soffits of an attic to provide an...

Energy and emissions saving potential of additive manufacturing: the case of lightweight aircraft components

Journal: Journal of Cleaner Production

Additive manufacturing (AM) holds great potential for improving materials efficiency, reducing life-cycle impacts, and enabling greater engineering functionality compared to conventional manufacturing (CM), and AM has been increasingly adopted by aircraft component manufacturers for lightweight, cost-effective...

Exergy analysis of a two-stage ground source heat pump with a vertical bore for residential space conditioning under simulated occupancy

Journal: Applied Energy

This twelve-month field study analyzes the performance of a 7.56 W (2.16-ton) water-to-air-ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the ground as a source...