heat pump Articles

  • Ground Source Heat Pumps

    In many buildings Ground Source Heat Pumps (GSHPs) provide an efficient solution for heating and cooling. Using low temperature latent heat which exists naturally below ground, GSHPs provide solutions by harvesting and transferring this energy for the benefit of the built environment. It is important to understand the feasibility of GSHP prior to designing a system. This guidance note has been ...


    By WSP

  • Pumps for synthetic heat-transfer liquids

    As soon as the temperature in a heat-transfer system becomes too high for water, a plant operator must choose between petroleum-based or synthetic oils as the heat-transfer liquid. When modern petroleum oils are used, systems with feed temperatures up to about 300 °C can stay in service for their entire service life with one filling and with virtually no maintenance. Once feed temperatures ...


    By ALLWEILER GmbH

  • Geothermal Heat Pump (GHP) - Case Studies

    Case Study: “GHP schools used approximately 26% less source energy per square foot of floor area,” according to an evaluation of Lincoln, Nebraska schools by the Department of Energy. The report concludes that the schools using GHP technology “outperform others in the school district.” Case Study: Annual electrical consumption in Fort Polk ...

  • Air Source Heat Pump Pros And Cons

    Advantages of air source heat pump: 1. Energy-saving: the average temperature is above 10 degrees. The unit consumes 1 kWh of electricity and can produce more than 4 kW of heat. It saves more than 70% of electricity bills than electric water heaters, and saves energy much compared to other water heaters. 2. ...

  • 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 ...


    By Inderscience Publishers

  • Ground Source Heat Pump installed in eco house

    This case study looks at a ground source heat pump being installed in London. A Ground Source Heat Pump was chosen as a sustainable and energy efficient way to provide 100% space heating and hot water for this 550m2 new build eco-house in East London. A Heat Recovery Mechanical Ventilation System was also utilised, which, together with Solar Thermal hot water and LED lighting give this stunning ...


    By Ground Sun

  • 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 ...


    By Inderscience Publishers

  • Effect of heat transfer law on the ecological optimisation of a generalised irreversible Carnot heat pump

    The optimal exergy-based ecological performance of an irreversible Carnot heat pump with the losses of heat-resistance, heat leak and internal irreversibility, in which the transfer between the working fluid and the heat reservoirs obeys a generalised heat transfer law Q ∝ Δ (Tn), is derived by taking into account an ecological optimisation criterion (E) as the objective function, ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • Emotion Energy - Air Source Heat pump case study

    Customer: Emotion Energy Location: Dumfries Heating System: 12KW Calorex Air to Water Heat Pump Installed: 09 Vortex was installed by Emotion Energy on an old isolated cottage which had been extended. They replaced an old oil boiler with a Calorex 12KW air to water heat pump and fitted Vortex ...


    By Vortex Energy Saver

  • 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 ...


    By Inderscience Publishers

  • Harrogate Borough Council - Ground Source Heat Pump case study

    Customer: Harrogate Borough Council Location: Copt Ewich Heating System: Ground Source Heat Pump Harrogate Borough Council installed 94 heat pumps in 2006 as a test project in a number of sites in Harrogate. Eight of these were fitted in a scheme at Copt Ewick. On one of these systems two Vortexs’ were fitted one on the ground loop and one ...


    By Vortex Energy Saver

  • Steady versus dynamic exergy analysis: the case of an air source heat pump

    Exergy analysis is often performed statically, for given system conditions and reference state. Dynamic exergy analyses, considering the variation of system operation and ambient conditions, would obviously be more time consuming. Therefore comparing the results of the two approaches helps understand when the dynamic methodology should be preferred. In this paper the yearly behaviour of a ...


    By Inderscience Publishers

  • Zoo-technical application of Ground Source Heat Pumps: a pilot case study

    Ground Source Heat Pumps are energy-efficient HVAC systems usually adopted in residential and commercial buildings. However the control of the thermal environment is required not only in spaces occupied by people, but also in intensive breeding farms, in order to maintain healthy conditions and to increase productivity. In the Italian livestock breedings, heating is usually provided by means of ...


    By Tethys srl

  • Thermodynamic analysis of a hybrid gas turbine/thermoacoustic heat pump/refrigeration engine

    Possible performance enhancement of small gas turbine power plants through the application of thermoacoustic systems is examined. The thermoacoustic subsystem is powered only by the waste heat of the gas turbine. Two different gas turbine configurations are considered: a Thermoacoustic refrigerator assisted gas turbine (TRG) and a Combined thermoacoustic heat pump and refrigeration assisted gas ...


    By Inderscience Publishers

  • Exergetic and sustainability performance assessment of geothermal (ground source) ejector heat pumps

    Although ejectors have been used in cooling/refrigeration and Heat Pumps (HP) applications for a long time, utilisation of Geothermal Ejector Heat Pump (GEHP) with Ground–Heat Exchanger (GHE) is a new idea, which has recently appeared in the literature. In this study, we model a GEHP system with a GHE in terms of exergetic aspects and apply our model to this system in the heating mode. The system ...


    By Inderscience Publishers

  • 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 ...


    By Inderscience Publishers

  • Comparative performance analysis for endoreversible simple air heat pump cycles considering ecological, exergetic efficiency and heating load objectives

    The performance analysis and optimisation of endoreversible simple air heat pump with constant-temperature heat reservoirs is carried out by using finite-time thermodynamics. The expressions of the heating load, the exergetic efficiency and the ecological function of the cycle are derived. The influences of the pressure ratio of the compressor and the allocation of heat exchanger inventory on the ...


    By Inderscience Publishers

  • Energy and exergy analysis of Hybrid Ground-Coupled Heat Pumps with hot water supply

    The energy and exergy efficiencies of a Hybrid Ground-Coupled Heat Pump (HGCHP) system with Domestic Hot Water (DHW) supply are analysed based on experimental study. Comparisons between the HGCHP and conventional DHW systems, i.e., Air Source Heat Pump (ASHP), Electric Heater (ElcH) and Gas-Fired Boiler (GasB), are made with respect to the energy and exergy efficiencies. The results show that the ...


    By Inderscience Publishers

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