[en] A project called FEMBE for district heating of the western part of the city of Bern is presented. Heat sources are the Muehleberg nuclear power plant, biogas from the waste plant Teuftal and boilers for peak heat. The projected heat extraction from the nuclear power plant amounts to 60 MW

[en] Only four years after the beginning of operation of the first consumer station at Klingnau on October 19, 1984, the Regional District Heating Supply in the Lower Aare Valley (Refuna) can already show 1295 operational district heating connections. There are almost 300 more than one year ago and about 20% more than originally foreseen during this short construction time. As in recent years, the number of consumers has significantly increased during a 'connection boom' in the first autumn weeks. The total heat supply power amounts to 51500 kilowatts. This is 70% of the power foreseen in the final stage. 3 figs., 1 tab

[en] Short communication

[en] The design of two heat pumps (HP), connected in series, was investigated for operation in the district heating (DH) network of the Greater Copenhagen area, Denmark. The installation was dimensioned to supply 7.2 MW of heat at a temperature of 85 °C. The heat pumps utilise a geothermal heat source at 73 °C. Both heat source and sink experience a large temperature change, which may lead to decreased performance for single vapour compression HP. The performance may be increased by using HPs connected in series and by applying HPs with zeotropic mixtures. First a generic study with a simple representation of the HP was applied to investigate optimal system configurations. It was shown that using two heat pumps in series with direct heat exchange in parallel with the first heat pump could increase the performance compared to the HP performance. Detailed thermodynamic models of a zeotropic mixture HP predicted that an exergetic efficiency of the units between 50% and 65% is possible. The technical feasibility as well as the economic viability of this installation was investigated for a range of optimal configurations. The analysis recommends a heat pump configuration with a system exergetic efficiency of 63%. - Highlights: • Design of a geothermal heat pump system is suggested for district heat supply. • Connecting heat pumps in series and direct heat exchange is investigated. • The technical feasibility and economic viability is evaluated. • A feasible and viable solution is identified.

No abstract available

[en] The various solutions envisaged to design nuclear power plants intended for a total power production (heat+electricity) are examined. The performance of the various reactor type as heat process reactors are discussed

[en] The transport and distribution of hot pressurized water involve different sets of criteria: transport networks, heat distribution networks, storages. The minimization of transport cost is studied together with the distribution of thermal energy. The same parameters are introduced into these programs. The same method is used for rate of flow calculations, but mathematical methods of pipe diameter calculation are different. Some transport and distribution networks are studied with the corresponding computed programs: 52 branches networks-27 terminations; 287 branches networks-148 terminations

[en] Highlights: • We study how home market affects demand response (DR) business development. • We analyze impacts of advanced home market on internationalization of DR companies. • Advanced market has enabled firms to develop new solutions and prove their concept. • Services developed for an advanced home market do not guarantee export benefits. The transition toward more renewable-based energy systems increases the need for new flexible resources, such as demand response (DR). Previous literature has found various barriers for DR utilization, but much of this research has focused on the initiation of DR operations or barriers in national markets and not on factors that hinder market upscaling and firm internationalization. We address this gap by analyzing interviews with 22 DR companies active in Finland, one of the early mover countries for automated DR. While most of previous research has focused on electricity DR, our interviewees also include district heating DR companies. By using the Technological Innovation System (TIS) framework, we study how the advanced regulatory and market framework and the technology rollout in Finland have affected the DR service development and the internationalization of Finnish companies. Based on our results, the DR market formation in Finland has largely relied on the Finnish transmission system operator's early decision to allow independent aggregation and the early large-scale rollout of smart meters. The advanced home market has enabled firms to develop new solutions and prove their concept. Yet, the highly structured nature of energy markets complicates the access to both advanced and less advanced foreign markets.

[en] The City of Boise, Idaho, an Idaho Municipal Corporation, is proposing to construct a well with which to inject spent geothermal water from its hot water heating system back into the geothermal aquifer. Because of a cooperative agreement between the City and the US Department of Energy to design and construct the proposed well, compliance to the National Environmental Policy Act (NEPA) is required. Therefore, this Environmental Assessment (EA) represents the analysis of the proposed project required under NEPA. The intent of this EA is to: (1) briefly describe historical uses of the Boise Geothermal Aquifer; (2) discuss the underlying reason for the proposed action; (3) describe alternatives considered, including the No Action Alternative and the Preferred Alternative; and (4) present potential environmental impacts of the proposed action and the analysis of those impacts as they apply to the respective alternatives

[en] Assuring district heating plant safety has required the use of engineering decisions based on inherent safety features of the reactor and on passive safety systems. It is shown that the ACT-500 reactor plant for DHPs currently under construction in the USSR meets the enhanced safety concept as follows from the quantitative and qualitative assessments