heat pump system Articles
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Second law based performance analysis of seawater source cascade heat pump system: a case study
This paper presents the second law based analysis of a seawater source cascade heat pump system operating with two different refrigerants. The present cascade heat pump system consists of two different heat pumps attached in such a way that the condenser of the first stage heat pump is the evaporator for the second heat pump and the condenser of the second heat pump is attached to the place to be ...
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Exergy analysis of a vapour-compression refrigeration/heat pump cycle with chimney
The greatest speciality of this work is using chimneys with different heights above the condenser instead of a condenser's fan on the vapour-compression refrigeration/heat pump system chosen as an experimental set. Exergy analyses of natural convection with and without chimneys and forced convection on the same experimental set have been made with acceptances of steady state-steady flow system on ...
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Utilisation of air-groundwater exergy potential for improvement of the performance of heat pump systems
This paper reports a study on the use of the non-flow air-groundwater exergy potential for improving heat pump performance. It is shown that for air/groundwater temperature differences of order 15°C, energy savings up to 50% may be expected for heat pumps operating either in the heating mode or in the cooling mode. It is also shown that the reduction in the energy required to drive the heat pump ...
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Heat Pump Used to Drain Contaminated Sludge in a Steel Factory
Untitled Document In 1987, new regulations required that factories dispose of their contaminated water and waste themselves. Making galvanised steel wire, the Stelfil factory produces sludge contaminated with lead and zinc. Stelfil spent thousands of dollars to bury this waste and evaluated three systems to remove most of the water: a gas dryer, an induction heated screw ...
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Technical and economic analysis of gas-engine driven heat pump in China
In this paper, the primary energy ratio and economic benefit of five different heating systems are analysed. The results show that the gas-engine heat pump system has the advantages of high primary energy efficiency and favours environmental protection in contrast to the other four heating systems. At the same time, to improve the economic benefit of the energy saving and environmental protection ...
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Energy and exergy analysis of an Automobile Heat Pump system
This study deals with energy and exergy analysis of an Automobile Heat Pump (AHP) system using R134a as the working fluid and ambient air as a heat source. An experimental AHP system consisting of original components from an Automobile Air Conditioning (AAC) system and some extra equipment was developed and instrumented. The system was operated in steady state under various ambient and return air ...
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Energy and exergy analysis of a solar–assisted heat pump space heating system for clear days
The studies over solar–assisted heat pump systems have been performed mostly on time periods when solar radiation is high. Therefore, this study focuses on performance analysis of a solar–assisted heat pump system which stores the energy during the clear day and uses it as a heat source of heat pump space heating system during the night. Energy and exergy analyses divided into two parts, which ...
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Thermodynamic analysis and assessment of space heating with ground–source heat pump for sustainable future
In this paper, the thermodynamic modelling of exergy loss, exergy efficiency, exergy destruction rate, environmental destruction coefficient, improvement potential, exergy destruction factor, relative irreversibility, productivity lack and exergetic factor of ground source heat pump (GSHP) system are investigated. The results show that these exergy indexes should be used integratively. Compressor ...
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Ground Source Heat Pumps Rudges Hill Case Study
Rudges Hill is a converted farm house in rural Oxfordshire undergoing renovation and extension. The owners were keen to reduce the future running costs of heating the house, producing hot water and heating the outdoor pool. Isoenergy installed a 34kW CTC ground source heat pump system with energy collected from 2,400 meters of horizontal collector array in a nearby field. The system is supported ...
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Proof: For superior energy efficiency - Water Beats VRF - Case Study
ASHRAE’s Apples to Apples Comparison Proves Hydronics Delivers Superior Energy Efficiency over VRF For years Variable Refrigerant Flow (VRF) manufacturers have been touting their systems’ superior energy efficiency over hydronics without providing the supporting data. Then ASHRAE decided to showcase both systems in its Atlanta headquarters and meter their performance. The results ...
By Evapco Inc.
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EnergySmart to Install Geothermal Heat Pumps at Historic Orchard House in Concord, MA - Case Study
EnergySmart Alternatives of Medford, Massachusetts has been hired to install a geothermal heat pump heating and cooling system for the historic home of ‘Little ...
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AGR 217,000m² Glasshouse and Energy Centre with 33MWth Heat Pump System and 9MW Combined Heat and Power Plant - Case Study
AGR is a leading renewable energy company specialising in low carbon energy generation, with over £350m of projects delivered to date in the UK, including a portfolio of gas peaking and combined heat and power (CHP) projects. AGR developed and is the main EPC contractor for a new 217,000m² glasshouse and energy centre in Cambridgeshire and has sold the project to funds managed by ...
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Diffusion of innovative heating systems in detached homes in Sweden
The Swedish homeowners' perception of Innovative Heating Systems (IHSs) was studied through a questionnaire survey. Most of the respondents were satisfied with their existing heating systems and were not planning to install a new one. They considered economic factors and functional reliability the most important factors in the choice of a heating system. Hence, economic policy instruments appear ...
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Do Air Source Heat Pumps Work in the UK?
The simple answer to this question is probably, yes, air source heat pumps do work in the UK. It might be more accurate, however, to say that air source heat pumps can work in the UK. It turns out that not all heat pump installations are equal. Air source heat pumps absorb heat from air outside and deliver heat inside the building via underfloor heating, radiators, convectors etc. You can think ...
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Rare earth intermetallic compounds
Rare-earth intermetallic compounds are metal compound phases formed between rare-earth metals and other metals or similar metals. They mainly use the special physical and chemical properties of rare-earth intermetallic compounds to prepare new rare earths for various purposes using various processing and manufacturing techniques. Functional Materials. At present, there are the following rare ...
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What’s geothermal again?
Some green energy sources seem to have charisma; others struggle for public attention with little success. Solar energy is an “it” technology, as evidenced once again by the tremendous participation in the annual Solar Power International conference in Anaheim, California this week (Oct. 27-29). Twice as many companies (945) are displaying their wares in the Expo Hall this year, despite the still ...
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A Great Project Delivered in Liepaja - Case Study
Year 2022 EcoHeat Technologies (Steel Pro) delivered another biomass driven container type energy plant with a comprehensive fuel supply system. This time – in Liepaja, Karosta. The facility will deliver energy for district heating in autumn 2022. Since, in procurement we’ve been awarded with the contract, we are incredibly happy to have “LIEPAJAS ENERGIJA” as our ...
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Analysis and Application of Sludge Low Temperature Heat Pump Drying Technology
Sludge is a by-product of the process of sewage treatment and water purification, and its main components include floccules composed of various microorganisms and organic and inorganic particles. The vast majority of sludge has the value of resource reuse. In 1995, the World Water Environment Federation (water environmental feder-action WEF) renamed the sludge as biosolids (biosolids), which is a ...
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Analysis and Application of Sludge Low Temperature Heat Pump Drying Technology
Sludge is a by-product of the process of sewage treatment and water purification, and its main components include floccules composed of various microorganisms and organic and inorganic particles. The vast majority of sludge has the value of resource reuse. In 1995, the World Water Environment Federation (water environmental feder-action WEF) renamed the sludge as biosolids (biosolids), which is a ...
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Analysis and Application of Sludge Low Temperature Heat Pump Drying Technology
Sludge is a by-product of the process of sewage treatment and water purification, and its main components include floccules composed of various microorganisms and organic and inorganic particles. The vast majority of sludge has the value of resource reuse. In 1995, the World Water Environment Federation (water environmental feder-action WEF) renamed the sludge as biosolids (biosolids), which is a ...
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