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Cold warehouses are relatively high energy consuming systems, and their construction are growing. In the design of these buildings, the choice of the insulation thickness is an important factor that affects the owning and operating costs. In practice, it is common to use heat flux density values or R-values given in the technical literatures. These values seem to neglect the possible effects of parameters...
This is a case study of a electroplating unit located in Vidarbha region of Maharashtra state. The energy audit indicated scope areas for conservation of energy. Energy audit study at the plant resulted in identification of the following energy saving opportunities. This study results in saving of about Rs 57,083 / year in the annual energy bill of the plant. Total approximate investment required...
A combined lighting and heating CO2 emission analysis is made for single-family detached households having lighting from incandescent light bulbs (ILBs) compared with those having energy saving lamps, taking in to consideration three temperature regions in Finland. Significance of heat replacement effect of incandescent bulbs is presented based on actual household consumptions and nationwide analytical...
A heat pump is a high-efficiency energy converting system, which can combine endothermic and exothermic functions. This study used a heat pump, combining an air conditioner and a boiler, in a factory to assess the energy utilization efficiency. The result showed that when the heat pump was used the entire year, 96,824 L of fuel oil, 136,953 kW of electricity, and 2,165 m3 of water could be saved....
This paper respectively calculates a actual project, using the traditional design method(single pump single heat source indirectly connected branched system) and the novel design method (single-pipe multi-heat sources with mixing-pumps of direct connected system), gets a series of important data of hydraulic working condition, then demonstrates the superiority of the new heating system in the aspects...
Increasing energy prices and the greenhouse effect lead to more awareness of energy efficiency of electricity supply. During the last years, a lot of technologies and optimization methodologies were developed to increase the efficiency, maintain the grid stability and support large scale introduction of renewable sources. In previous work, we showed the effectiveness of our three-step methodology...
The network model bases upon the energy hub concept, which was developed by the Vision of Future Energy Networks” (VoFEN) research group at ETH Zurich in the last years. Keynote of the concept is a combined optimization of different energy carrier. Synergetic effects are expected to give unusual optimization results, when allowing any possible energy conversion inside a specific area that constitute...
Normally, The air-source heat pump (ASHP) can not work well in the serious cold regions of china in winter. In order to study this issue, the experiment system of Air-source Heat Pump using exhaust of building as Heating Source was developed, the system used the surplus energy of exhaust fully, raised the air temperature of ASHP, recovered the energy of exhaust by direct exchange, and heated fresh...
Increasing energy prices and the greenhouse effect lead to more awareness of energy efficiency of electricity supply. During the last years, a lot of technologies have been developed to improve this efficiency. Next to large scale technologies such as wind turbine parks, domestic technologies are developed. These domestic technologies can be divided in (1) Distributed Generation (DG), (2) Energy Storage...
Danish energy policy has developed over the last 35 years, and has continuously stressed energy efficiency as a central theme. A number of activities are used to promote energy efficiency, including taxes, building codes, Electricity Saving Thrust and utility DSM. The framework for utility DSM activities was updated in 2006 with higher targets and more flexibility. An evaluation of all Danish energy...
Increasing energy prices and the greenhouse effect lead to more awareness of energy efficiency of electricity supply. During the last years, a lot of domestic technologies have been developed to improve this efficiency. These technologies on their own already improve the efficiency, but more can be gained by a combined management. Multiple optimization objectives can be used to improve the efficiency,...
Integrating the solar utilization system with the coal- fired power plant into the solar supported coal-fired power generation (SSCPG) system shows an effective way for the large- scale utilization of solar energy and energy conservation in coal- fired power units currently in China. Two SSCPG systems integrating solar utilization system with C50-8.83/0.294 heat and electricity cogeneration unit are...
The combination application of electric heat pump and storage capacity technology has simultaneously achieved two goals, of which one is energy saving and the other is improvement on electricity load characteristic. The performance of the combination system engineering is tested on site. Based on the analysis result, problems and ameliorative suggestions existed in the engineering practice are put...
The activities and present state of R&D and deployment of residential fuel cells in Japan are presented. More than 2,000 fuel cell systems using polymer electrolyte membrane fuel cells (PEFC) have been installed to general homes by the end of 2007. The development of residential solid oxide fuel cell (SOFC) systems is also being promoted toward market launch. The activities of Osaka Gas Ltd. are...
Demand Side Management (DSM) methods are used by electrical utilities to modify their network loading profile and also to conserve energy during shortages. In New Zealand, residential heating/cooling is considered to be one major constituent of electrical demand for homes. This paper presents ideas for two aspects of DSM being implemented for residential loads. This is by increasing energy efficiency...
ldquoDevelopment for advanced thermoelectric conversion systemsrdquo supported by the new energy and industrial technology development organization (NEDO) has been successfully completed as one of the Japanese national energy conservation projects. Three types of the cascaded thermoelectric modules operating up to 850 K in high electrode temperature and two types of Bi-Te thermoelectric modules operating...
Cement production is one of the most energy intensive industrial processes in the world. In many world regions, energy cost is 50% to 60% of the direct production cost of cement. Energy cost is incurred due to the need for large quantities of thermal heat for the kiln, calcination and drying processes and electrical energy for operation of motors for grinding mills, fans, conveyers and other motor...
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