scholarly journals Expedited Holonomic Quantum Computation via Net Zero-Energy-Cost Control in Decoherence-Free Subspace

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
P. V. Pyshkin ◽  
Da-Wei Luo ◽  
Jun Jing ◽  
J. Q. You ◽  
Lian-Ao Wu
Keyword(s):  
Quantum Computation ◽  
Energy Cost ◽  
Fault Tolerant ◽  
External Control ◽  
Full Potential ◽  
Zero Energy ◽  
Net Zero Energy ◽  
Net Zero ◽  
Control Scheme ◽  
Decoherence Free Subspace

Abstract Holonomic quantum computation (HQC) may not show its full potential in quantum speedup due to the prerequisite of a long coherent runtime imposed by the adiabatic condition. Here we show that the conventional HQC can be dramatically accelerated by using external control fields, of which the effectiveness is exclusively determined by the integral of the control fields in the time domain. This control scheme can be realized with net zero energy cost and it is fault-tolerant against fluctuation and noise, significantly relaxing the experimental constraints. We demonstrate how to realize the scheme via decoherence-free subspaces. In this way we unify quantum robustness merits of this fault-tolerant control scheme, the conventional HQC and decoherence-free subspace, and propose an expedited holonomic quantum computation protocol.

Commercialisation Strategies For Net Zero-Energy-Cost Housing in Japan

2008 ◽  
Vol 33 (3) ◽  
pp. 96-104
Author(s):  
Masa Noguchi ◽  
Darragh Collins
Keyword(s):  
Energy Cost ◽  
Zero Energy ◽  
Water Heater ◽  
Standard Equipment ◽  
Niche Marketing ◽  
Energy Technologies ◽  
Heat Pump Water Heater ◽  
Net Zero Energy ◽  
Net Zero ◽  
Zero Carbon

Today, Japanese housing manufacturers compete to produce net zero-energy-cost houses that are usually equipped with some renewable energy technologies-e.g. a solar photovoltaic electric power generating system, a CO2 refrigerant heat-pump water heater and a combined heat and power system. Interestingly, the manufacturers tend to install these costly renewable technologies as standard equipment rather than options. To initiate and maintenance the sales of their environmentally-friendly houses, the manufacturers bring into effect their quality-oriented production and user-oriented communication approaches. The manufacturers' way to commercialise their industrialised housing to some extent reflects their high cost-performance marketing strategy. This paper somewhat reflects the learning outcomes of the Zero-carbon PV Mass Custom Home Technical Mission to Japan that the first author organised in 2006 and 2007. It is aimed at identifying the manufacturers' essential commercialisation strategies being applied for the niche-marketing of their net zero-energy-cost housing.

scholarly journals Case Study of Load Matching and Energy Cost for Net-Zero Energy Houses in Korea

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6407
Author(s):  
Hee-Won Lim ◽  
Ji-Hyeon Kim ◽  
Hyeun-Seung Lee ◽  
U-Cheul Shin
Keyword(s):  
Energy Saving ◽  
Energy Cost ◽  
Value Added ◽  
Hot Water ◽  
Zero Energy ◽  
Pv System ◽  
Cover Factor ◽  
Load Matching ◽  
Net Zero Energy ◽  
Net Zero

Over the past 20 years, net-zero energy house (NZEH) construction costs have steadily decreased because of many reasons, such as technical progress, energy-saving design obligations, and dramatic cost reductions in renewable energy systems, especially solar power systems. Currently, the costs of NZEH are estimated to be about 5% higher than similar-sized houses. These additional costs are mainly for installing PV systems, which can be offset by energy saving costs. This study assessed energy performance and load matching through remote monitoring systems, and energy costs were analyzed for two-family houses. The two houses were all-electric houses and different in both size and location. A 6 kWp grid-connected PV system and 16 kW air source heat pump for space heating and domestic hot water were equally implemented. After data analysis, 100% of the energies were supplied through the PV system for 3 years, thus achieving net-zero energy. According to the Korean residential electricity tariff system, the annual electricity charges were, on average, between USD 105.1 and USD 121.4 after adding demand charges and value-added tax for import electricity charges. The energy cost reduction rate, compared to the same house without a PV system, was about 95%, and the simple payback period of the 6 kW PV system in NZEH was about 6 years. In addition, the annual load cover factor and supply cover factor as load-match indices between electricity generation and the load were in a range of 0.39–0.49 and 0.37–0.42, respectively.

Intelligent building development and LabView-based modelling of a net zero-energy strategy

2014 ◽  
Vol 5 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Cs. Szász
Keyword(s):  
Development Strategy ◽  
Measurement Data ◽  
Renewable Energy Resources ◽  
Balance Performance ◽  
Zero Energy ◽  
Intelligent Building ◽  
Labview Software ◽  
Net Zero Energy ◽  
Net Zero Energy Building ◽  
Net Zero

The paper presents an intelligent building (IB) development strategy emphasizing the locally available non-polluting renewable energy resources utilization. Considering the immense complexity of the topic, the implementation strategy of the main energy-flow processes is unfolded, using the net zero-energy building concept (NZEB). Noticeably, in the first research steps the mathematical background of the considered NZEB strategy has been developed and presented. Then careful LabView software-based simulations prove that the adopted strategy is feasible for implementation. The result of the above mentioned research efforts is a set of powerful and versatile software toolkits well suitable to model and simulate complex heating, ventilation and air-conditioning processes and to perform energy balance performance evaluations. Besides the elaborated mathematical models, concrete software implementation examples and measurement data also is provided in the paper. Finally, the proposed original models offer a feasible solution for future developments and research in NZEB applications modelling and simulation purposes.

Proceedings of the ERDC-CERL Net Zero Energy (NZE) Installation and Deployed Bases Workshop Held in Colorado Springs, CO. on 3-4 Feb 2009

2009 ◽  
Author(s):  
Carl A. Feickert ◽  
Thomas J. Hartranft ◽  
Franklin H. Holcomb ◽  
John L. Vavrin ◽  
Alexander M. Zhivov ◽  
...  
Keyword(s):  
Zero Energy ◽  
Colorado Springs ◽  
Net Zero Energy ◽  
Net Zero
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