356 research outputs found
Commercial Buildings Partnership Projects - Metered Data Format and Delivery
A number of the Commercial Building Partnership Projects (CBPs) will require metering, monitoring, data analysis and verification of savings after the retrofits are complete. Although monitoring and verification (M&V) agents are free to use any metering and monitoring devices that they chose, the data they collect should be reported to Pacific Northwest National Laboratory (PNNL) in a standard format. PNNL will store the data collected in its CBP database for further use by PNNL and U.S. Department of Energy. This document describes the data storage process and the deliver format of the data from the M&V agents
A Computer Analysis of Energy Use and Energy Conservation Options for a Twelve Story Office Building in Austin, Texas
The energy use of the Travis Building
at Austin, Texas was analyzed using the DOE
2.1B building energy simulation program.
An analysis was made for the building as
specified in the building plans and as
operated by the personnel currently
occupying the building. The energy
consumption of the building was compared
with the energy consumption of the building
modified to comply with the proposed ASHRAE
90.1p standards. The base design and the
ASHRAE design of the Travis building were
evaluated in Brownsville, Houston, Lubbock,
and El Paso to study the influence of the
weather on its energy consumption. In
addition, a glass with high reflectivity
and low overall heat transfer coefficient
was used to study the reduction of glass
conduction and glass solar loads. Finally,
the energy consumption of the modified
building was compared with the energy
consumption of the modified building which
conformed to the California energy
standards
Economic Investigation of Community-Scale Versus Building Scale Net-Zero Energy
The study presented in this report examines issues concerning whether achieving net-zero energy performance at the community scale provides economic and potentially overall efficiency advantages over strategies focused on individual buildings
Development of a Low-Lift Chiller Controller and Simplified Precooling Control Algorithm - Final Report
KGS Buildings LLC (KGS) and Pacific Northwest National Laboratory (PNNL) have developed a simplified control algorithm and prototype low-lift chiller controller suitable for model-predictive control in a demonstration project of low-lift cooling. Low-lift cooling is a highly efficient cooling strategy conceived to enable low or net-zero energy buildings. A low-lift cooling system consists of a high efficiency low-lift chiller, radiant cooling, thermal storage, and model-predictive control to pre-cool thermal storage overnight on an optimal cooling rate trajectory. We call the properly integrated and controlled combination of these elements a low-lift cooling system (LLCS). This document is the final report for that project
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Advanced CHP Control Algorithms: Scope Specification
The primary objective of this multiyear project is to develop algorithms for combined heat and power systems to ensure optimal performance, increase reliability, and lead to the goal of clean, efficient, reliable and affordable next generation energy systems
Energy Use and Design Options for Texas State Buildings
This report summarizes the first phase of the program to reduce energy
use in proposed new construction in state-owned buildings. The
Energy Systems Group of the Department of Mechanical Engineering at
Texas A&M University worked jointly with the Energy Management Center
(EMC) of the Governor's Office (formerly the Energy Efficiency Division of
the Public Utility Commission) and the State Purchasing and General Services
Commission (SPGSC). A total of six buildings were analyzed. One
of the buildings had just been completed when this project was initiated
in 1986. The other five buildings were in various design phases.In 1984, the Office of Governor in the State of Texas, working through
the Energy Efficiency Division of the Public Utility Commission, instituted
a program to reduce the energy costs in state owned buildings. One
facet of this program was the reduction of energy use of all new buildings
constructed for state agencies. The first phase of this program was to
estimate the energy use of new buildings corresponding to current construction
practices in state facilities and to make recommendations for
improvements. This phase also included an evaluation of how building
standards might impact the energy use of new construction. The second
phase includes the development and implementation of energy standards
for all new construction. It should be noted that the report does not
investigate the economic impact of the proposed changes
Simulation of the Post-Retrofit Thermal Energy Use for the University Teaching Center (UTC) Building with the Use of Simplified System Models
Several state owned buildings with dual-duct constant volume (DDCV) systems have
been retrofitted with energy efficient variable air volume systems (VAV) as part of the
Texas LoanSTAR Program. One method of determining the energy savings resulting
from energy conserving retrofits relies on the use of a model for the daily whole building
consumption, Epre, in the pre-retrofit configuration. Epre is typically a function of primary
influencing parameters such as ambient temperature, humidity, building internal gains
and others (Figure 1). Following the retrofit, the energy saved, Esav is determined using
measured daily consumption, Emea3 as shown in Figure 1. This method is being used in
the Texas LoanSTAR monitoring and analysis program for buildings that have adequate
pre-retrofit monitored data (Kelly et al., 1992). Unfortunately, in the University Teaching Center (UTC) the retrofits were completed
before the monitoring instrumentation was installed. Therefore, no pre-retrofit monitored
data are available. Hence another method to estimate savings was needed. Such
a method was developed and tested on a large engineering center (Katipamula and
Claridge 1991). This method was based on the use of the ASHRAE TC 4.7 simplified
energy analysis procedure (SEAP). It involved developing one model each for the VAV
(post-retrofit system) and the DDCV (pre-retrofit system) systems
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Performance and evaluation of gas-engine-driven rooftop air conditioning equipment at the Willow Grove Naval Air Station. Final report (revised October 21, 1996)
The performance was evaluated of a new US cooling technology that has been installed for the first time at a federal facility. The technology is a 15-ton natural gas-engine-driven rooftop air conditioning unit made by Thermo King. Two units were installed to serve the Navy Exchange at Willow Grove. The savings potential at Willow Grove is described and that in the federal sector estimated. Conditions for implementation are discussed. In summary, the new technology is generally cost-effective at sites where marginal electricity cost (per MBtu at the meter) is more than 4 times the marginal gas cost (per MBtu at the meter) and annual full-load-equivalent cooling hours exceed 2,000
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Methods for Automated and Continuous Commissioning of Building Systems
Avoidance of poorly installed HVAC systems is best accomplished at the close of construction by having a building and its systems put ''through their paces'' with a well conducted commissioning process. This research project focused on developing key components to enable the development of tools that will automatically detect and correct equipment operating problems, thus providing continuous and automatic commissioning of the HVAC systems throughout the life of a facility. A study of pervasive operating problems reveled the following would most benefit from an automated and continuous commissioning process: (1) faulty economizer operation; (2) malfunctioning sensors; (3) malfunctioning valves and dampers, and (4) access to project design data. Methodologies for detecting system operation faults in these areas were developed and validated in ''bare-bones'' forms within standard software such as spreadsheets, databases, statistical or mathematical packages. Demonstrations included flow diagrams and simplified mock-up applications. Techniques to manage data were demonstrated by illustrating how test forms could be populated with original design information and the recommended sequence of operation for equipment systems. Proposed tools would use measured data, design data, and equipment operating parameters to diagnosis system problems. Steps for future research are suggested to help more toward practical application of automated commissioning and its high potential to improve equipment availability, increase occupant comfort, and extend the life of system equipment
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Demonstration of Smart Building Controls to Manage Building Peak Loads: Innovative Non-Wires Technologies
As a part of the non-wires solutions effort, BPA in partnership with Pacific Northwest National Laboratory (PNNL) is exploring the use of two distributed energy resources (DER) technologies in the City of Richland. In addition to demonstrating the usefulness of the two DER technologies in providing peak demand relief, evaluation of remote direct load control (DLC) is also one of the primary objectives of this demonstration. The concept of DLC, which is used to change the energy use profile during peak hours of the day, is not new. Many utilities have had success in reducing demand at peak times to avoid building new generation. It is not the need for increased generation that is driving the use of direct load control in the Northwest, but the desire to avoid building additional transmission capacity. The peak times at issue total between 50 and 100 hours a year. A transmission solution to the problem would cost tens of millions of dollars . And since a ?non wires? solution is just as effective and yet costs much less, the capital dollars for construction can be used elsewhere on the grid where building new transmission is the only alternative. If by using DLC, the electricity use can be curtailed, shifted to lower use time periods or supplemented through local generation, the existing system can be made more reliable and cost effective
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