Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Laboratory Evaluation Of Gas Fired Tankless And Storage Water Heater Approaches To Combination Water And Space Heating
Download Laboratory Evaluation Of Gas Fired Tankless And Storage Water Heater Approaches To Combination Water And Space Heating full books in PDF, epub, and Kindle. Read online Laboratory Evaluation Of Gas Fired Tankless And Storage Water Heater Approaches To Combination Water And Space Heating ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Laboratory Evaluation of Gas-fired Tankless and Storage Water Heater Approaches to Combination Water and Space Heating by : Tim Kingston
Download or read book Laboratory Evaluation of Gas-fired Tankless and Storage Water Heater Approaches to Combination Water and Space Heating written by Tim Kingston and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homebuilders are exploring more cost effective combined space and water heating systems (combo systems) with major water heater manufacturers that are offering pre-engineered forced air space heating combo systems. In this project, unlike standardized tests, laboratory tests were conducted that subjected condensing tankless and storage water heater based combo systems to realistic, coincidental space and domestic hot water loads with the following key findings: 1) The tankless combo system maintained more stable DHW and space heating temperatures than the storage combo system. 2) The tankless combo system consistently achieved better daily efficiencies (i.e. 84%-93%) than the storage combo system (i.e. 81%- 91%) when the air handler was sized adequately and adjusted properly to achieve significant condensing operation. When condensing operation was not achieved, both systems performed with lower (i.e. 75%-88%), but similar efficiencies. 3) Air handlers currently packaged with combo systems are not designed to optimize condensing operation. More research is needed to develop air handlers specifically designed for condensing water heaters. 4) System efficiencies greater than 90% were achieved only on days where continual and steady space heating loads were required with significant condensing operation. For days where heating was more intermittent, the system efficiencies fell below 90%.
Book Synopsis Laboratory Evaluation of Gas-fired Tankless and Storage Water Heater Approaches to Combination Water and Space Heating by : Tim Kingston
Download or read book Laboratory Evaluation of Gas-fired Tankless and Storage Water Heater Approaches to Combination Water and Space Heating written by Tim Kingston and published by . This book was released on 2013 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homebuilders are exploring more cost effective combined space and water heating systems (combo systems) with major water heater manufacturers that are offering pre-engineered forced air space heating combo systems. In this project, unlike standardized tests, laboratory tests were conducted that subjected condensing tankless and storage water heater based combo systems to realistic, coincidental space and domestic hot water loads with the following key findings: 1) The tankless combo system maintained more stable DHW and space heating temperatures than the storage combo system. 2) The tankless combo system consistently achieved better daily efficiencies (i.e. 84%-93%) than the storage combo system (i.e. 81%- 91%) when the air handler was sized adequately and adjusted properly to achieve significant condensing operation. When condensing operation was not achieved, both systems performed with lower (i.e. 75%-88%), but similar efficiencies. 3) Air handlers currently packaged with combo systems are not designed to optimize condensing operation. More research is needed to develop air handlers specifically designed for condensing water heaters. 4) System efficiencies greater than 90% were achieved only on days where continual and steady space heating loads were required with significant condensing operation. For days where heating was more intermittent, the system efficiencies fell below 90%.
Book Synopsis Experimental Study on the Performance of a Combination Appliance for Domestic Hot Water and Space Heating by : Stanley T. Liu
Download or read book Experimental Study on the Performance of a Combination Appliance for Domestic Hot Water and Space Heating written by Stanley T. Liu and published by . This book was released on 1990 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Type II combination appliance consisting of a 50-gallon gas-fired water heater and a fan-coil air handling unit was tested in the laboratory to evaluate different methods for the determination of the combined heating seasonal, non-heating seasonal efficiencies and combined annual efficiency. Laboratory tests were conducted in accordance with the ANSI/ASHRAE 103-1988 for boilers and the DOE 10 CFR Part 430 for domestic water heaters to obtain the steady state and heating seasonal efficiencies of the water heater functioning as a space heating boiler and the energy factor of the heater functioning as a domestic water heater. These efficiency values were used to compute the combined heating seasonal and non-heating seasonal efficiencies by two different calculation methods. A series of tests with part load space heating cycling combined with domestic hot water draws were also conducted to measure the combined efficiencies directly. Comparison of the measured heating seasonal efficiency with those obtained from the two proposed calculation methods showed very good agreement. Recommendation was made to adopt the NIST developed calculation method for the rating of the combination appliance.
Book Synopsis NIST Building & Fire Research Laboratory Publications by :
Download or read book NIST Building & Fire Research Laboratory Publications written by and published by . This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Building and Fire Research Laboratory Publications by : Building and Fire Research Laboratory (U.S.)
Download or read book Building and Fire Research Laboratory Publications written by Building and Fire Research Laboratory (U.S.) and published by . This book was released on 1995 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Projects 1993 written by Noel J. Raufaste and published by . This book was released on 1993 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Register written by and published by . This book was released on 2013 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation Models for Improved Water Heating Systems by : Jim Lutz
Download or read book Simulation Models for Improved Water Heating Systems written by Jim Lutz and published by . This book was released on 2013 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measure Guideline: Combination Forced-Air Space and Tankless Domestic Hot Water Heating Systems by :
Download or read book Measure Guideline: Combination Forced-Air Space and Tankless Domestic Hot Water Heating Systems written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes design and application guidance for combination space and tankless domestic hot water heating systems (combination systems) used in residential buildings, based on field evaluation, testing, and industry meetings conducted by Building Science Corporation. As residential building enclosure improvements continue to drive heating loads down, using the same water heatingequipment for both space heating and domestic water heating becomes attractive from an initial cost and space-saving perspective. This topic is applicable to single- and multi-family residential buildings, both new and retrofitted.
Book Synopsis Residential Water Heating Program by : Douglas Kosar
Download or read book Residential Water Heating Program written by Douglas Kosar and published by . This book was released on 2012 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field Study of Domestic Hot Water Service from Gas-fired Boilers by : American Gas Association. Committee on Domestic Gas Research
Download or read book Field Study of Domestic Hot Water Service from Gas-fired Boilers written by American Gas Association. Committee on Domestic Gas Research and published by . This book was released on 1947 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Gas Appliance Development by :
Download or read book Advanced Gas Appliance Development written by and published by . This book was released on 2011 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Efficiency Evaluation and Consumer Economic Analysis of Domestic Water Heaters by : G. G. Slaughter
Download or read book An Efficiency Evaluation and Consumer Economic Analysis of Domestic Water Heaters written by G. G. Slaughter and published by . This book was released on 1978 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measure Guideline written by Armin Rudd and published by . This book was released on 2012 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes design and application guidance for combination space and tankless domestic hot water heating systems (combination systems) used in residential buildings, based on field evaluation, testing, and industry meetings conducted by Building Science Corporation. As residential building enclosure improvements continue to drive heating loads down, using the same water heating equipment for both space heating and domestic water heating becomes attractive from an initial cost and space-saving perspective. This topic is applicable to single- and multi-family residential buildings, both new and retrofitted.
Book Synopsis Assessment of a Hybrid Retrofit Gas Water Heater by :
Download or read book Assessment of a Hybrid Retrofit Gas Water Heater written by and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project completed a modeling evaluation of a hybrid gas water heater that combines a reduced capacity tankless unit with a downsized storage tank. This product would meet a significant market need by providing a higher efficiency gas water heater solution for retrofit applications while maintaining compatibility with the 1/2 inch gas lines and standard B vents found in most homes. The TRNSYS simulation tool was used to model a base case 0.60 EF atmospheric gas storage water, a 0.82 EF non-condensing gas tankless water heater, an existing (high capacity) hybrid unit on the market, and an alternative hybrid unit with lower storage volume and reduced gas input requirements. Simulations were completed under a 'peak day' sizing scenario with 183 gpd hot water loads in a Minnesota winter climate case. Full-year simulations were then completed in three climates (ranging from Phoenix to Minneapolis) for three hot water load scenarios (36, 57, and 96 gpd). Model projections indicate that the alternative hybrid offers an average 4.5% efficiency improvement relative to the 0.60 EF gas storage unit across all scenarios modeled. The alternative hybrid water heater evaluated does show promise, but the current low cost of natural gas across much of the country and the relatively small incremental efficiency improvement poses challenges in initially building a market demand for the product.
Download or read book Measure Guideline written by and published by . This book was released on 2017 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combined space and water heater (combi or combo) systems are defined by their dual functionality. Combi systems provide both space heating and water heating capabilities with a single heat source. This guideline will focus on the installation and operation of residential systems with forced air heating and domestic hot water (DHW) functionality. Past NorthernSTAR research has used a combi system to replace a natural gas forced air distribution system furnace and tank type water heater (Schoenbauer et al. 2012; Schoenbauer, Bohac, and McAlpine 2014). The combi systems consisted of a water heater or boiler heating plant teamed with a hydronic air handler that included an air handler, water coil, and water pump to circulate water between the heating plant and coil. The combi water heater or boiler had a separate circuit for DHW. Past projects focused on laboratory testing, field characterization, and control optimization of combi systems. Laboratory testing was done to fully characterize and test combi system components; field testing was completed to characterize the installed performance of combi systems; and control methodologies were analyzed to understand the potential of controls to simplify installation and design and to improve system efficiency and occupant comfort. This past work was relied upon on to create this measure guideline.
Book Synopsis Preliminary Modeling, Testing, and Analysis of a Gas Tankless Water Heater by :
Download or read book Preliminary Modeling, Testing, and Analysis of a Gas Tankless Water Heater written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's gas tankless water heaters offer significant energy savings over conventional gas storage tank water heaters, but savings depends on the draw pattern. A one-node model incorporating heat exchanger mass is used to address this and other issues. Key model parameters are determined from least-squares regression on short-term data, including burner efficiency, thermal capacitance, and thermal loss coefficient. Adding a small tank controlled by the tankless heater solves issues of oscillations with solar pre-heat, low-flow and hot-water-delay issues. Future work includes model refinements and developing optimal data protocols for model parameter extraction.
