Search Results - subject:"Hot water"

Retrofitting Conventional Electric Domestic Hot Water Heaters to Solar Water Heating Systems in Single-Family Houses—Model Validation and Optimization

Bernardo, Luis R. - In: Energies 6 (2013) 2, pp. 953-972

for solar heating technology development. Retrofitting hot water boilers in single-family houses when installing solar …. A sensitivity analysis was carried out regarding different volumes of retrofitted hot water boiler, DHW profiles and …

Persistent link: https://www.econbiz.de/10011031368

Hot Water Pretreatment of Boreal Aspen Woodchips in a Pilot Scale Digester

Yan, Jipeng; Liu, Shijie - In: Energies 8 (2015) 2, pp. 1166-1180

Hot water extraction of aspen woodchips was treated at about 160 °C for 2 h with a liquor-to-solid ratio of 4.76:1 in a … in the extraction liquor. Xylose and xylooligomers are the main five-carbon sugar in the hot water extract, which reached …, mannose, rhamnose, glucose, and arabinose are also obtained during the hot water extraction. Rhamnose is the main six …

Persistent link: https://www.econbiz.de/10011160783

Comparative Analysis of Milled Wood Lignins (MWLs) Isolated from Sugar Maple (SM) and Hot-Water Extracted Sugar Maple (ESM)

Goundalkar, Mangesh J.; Corbett, Derek B.; Bujanovic, … - In: Energies 7 (2014) 3, pp. 1363-1375

To further elucidate the advantageous effects of hot-water extraction (HWE) on delignification, milled wood lignin (MWL …) was isolated from sugar maple (SM) and from hot-water extracted sugar maple (ESM). Ball-milled wood was analyzed for … substructures during HWE is suggested. The removal of lignin during acetone:water (AW) extraction of hot-water extracted wood …

Persistent link: https://www.econbiz.de/10010748014

A Dual Function Energy Store

Tolmie, Ron; Rosen, Marc A. - In: Sustainability 6 (2014) 11, pp. 8297-8309

Heat can be collected from local energy sources and concentrated into a relatively small volume, and at a useful working temperature, by using a heat pump as the concentrator. That heat can be stored and utilized at a later date for applications like space heating. The process is doing two...

Persistent link: https://www.econbiz.de/10011075161

Retrofitting Domestic Hot Water Heaters for Solar Water Heating Systems in Single-Family Houses in a Cold Climate: A Theoretical Analysis

Bernardo, Luis R.; Davidsson, Henrik; Karlsson, Björn - In: Energies 5 (2012) 10, pp. 4110-4131

. Retrofitting existing domestic hot water heaters when a new solar hot water system is installed can reduce both the installation …

Persistent link: https://www.econbiz.de/10011031432

Evaluating the energy and CO2 emissions impacts of shifts in residential water heating in the United States

Sanders, Kelly T.; Webber, Michael E. - In: Energy 81 (2015) C, pp. 317-327

Water heating represented nearly 13% of 2010 residential energy consumption making it an important target for energy conservation efforts. The objective of this work is to identify spatially-resolved strategies for energy conservation, since little analysis has been done to identify how regional...

Persistent link: https://www.econbiz.de/10011209483

Optimal electricity dispatch on isolated mini-grids using a demand response strategy for thermal storage backup with genetic algorithms

Neves, Diana; Silva, Carlos A. - In: Energy 82 (2015) C, pp. 436-445

The present study uses the DHW (domestic hot water) electric backup from solar thermal systems to optimize the total …

Persistent link: https://www.econbiz.de/10011209575

A synergetic pretreatment technology for woody biomass conversion

Liu, Shijie - In: Applied Energy 144 (2015) C, pp. 114-128

otherwise waste into value-added product(s). Hot-water extraction can serve this purpose. With a hot-water extraction process as … produced from the hot-water extraction and the treated woody biomass can be more efficiently transformed in the cracking step … biomass is of zeroth order, following a surface renewal mechanism during the bulk of the hot-water extraction process. …

Persistent link: https://www.econbiz.de/10011263291

The impact of two-stage discharging on the exergoeconomic performance of a storage-type domestic water-heater

Atikol, U.; Aldabbagh, L.B.Y. - In: Energy 83 (2015) C, pp. 379-386

, being subjected to two volumes of hot water removals at 5 L/min; the first one immediately after the heating of water in the …-stage discharging regime is designed and experimented in such a way to represent the two shower taking periods after the hot water … withdrawal of hot water volume must be maximized, while the standing period between the two discharges is minimized. For long …

Persistent link: https://www.econbiz.de/10011264418

Performance investigation of a novel frost-free air-source heat pump water heater combined with energy storage and dehumidification

Wang, Fenghao; Wang, Zhihua; Zheng, Yuxin; Lin, Zhang; … - In: Applied Energy 139 (2015) C, pp. 212-219

Air-source heat pump (ASHP) often operates with substantial frost formation on the outdoor heat exchanger at low ambient temperature in winter, it insulates the finned surface and also reduces heat transfer rate, leading to performance degradation or even shutdown of ASHP systems. Although...

Persistent link: https://www.econbiz.de/10011116067