Abstract The paper seeks the optimal configuration of equipment capable generating heat and cold. For generation two products, for first time it is considered a coupled system pump refrigeration system. Waste from an industrial process used as source cycle. system, carbon dioxide working agent, agent R152a. In order to identify malfunctions at level each device process, exergy analysis used, wh...

An in-well pumped InGaAs disk laser emitting at 984 nm is presented. The device is designed to eliminate major loss mechanisms attributed to heat generation in semiconductor disk lasers. An output power of close to 7W at room temperature is achieved by optical excitation with a fiber-coupled 940 nm diode laser. Strong cooling or the use of heat spreaders with high thermal conductivity is not ne...

The heat transfer model of vertical ground heat exchangers for ground-source heat pump systems is discussed. An explicit solution of a finite line-source model has been derived to better describe temperature response of boreholes for long time steps, which can be easily incorporated into computer programs for thermal analysis of ground heat exchangers. A quasi-three-dimensional model is also pr...

Article history: Received 18 March 2016 Received in revised form 19 August 2016 Accepted 22 August 2016 Available online 24 August 2016 The abandoned workings of the former Markham Colliery are still in the process of flooding. They are being exploited, via a ‘standing column’ heat pump arrangement in Markham No. 3 shaft, to produce thermal energy. From 2012, water was pumped from 235 m below g...

Ground Heat Exchangers (GHEs), buried in the ground either horizontally or vertically (in a borehole), are coupled with heat pump to form Source Pump (GSHP) system, which is type of Renewable Energy System that exploits geothermal energy for space heating and cooling. GSHP systems proposed as an alternative conventional Air Pumps (ASHPs) they exhibit higher efficiency. In this study, difference...