Essays about: "subcooling"

Showing result 1 - 5 of 7 essays containing the word subcooling.

1. 1. Boiling heat transfer of multiple impinging water jets on a hot rotary cylinder

   University essay from Högskolan i Gävle/Avdelningen för byggnadsteknik, energisystem och miljövetenskap

   Author : Aitor Uriarte; [2021]
   Keywords : Quenching; unsteady heat transfer; multiple impinging jet; boiling; rotary cylinder; fast cooling.;

   Abstract : Quenching technique is widely used in industrial applications as it enhances the mechanical properties of metals such as hardness and tensile strength. This technique consists of a heating process followed by fast cooling which results in different microstructures that enhance the metal behavior. READ MORE

3. 2. Performance comparison between reciprocating and scroll compressor heat pumps with R600a refrigerant

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : CHRISTOFER KRONSTRÖM; [2021]
   Keywords : Heat pump; R600a; isobutane; scroll compressor; reciprocating compressor; piston compressor; Värmepump; R600a; isobutan; scrollkompressor; kolvkompressor;

   Abstract : A performance comparison of heat pumps using a scroll (Sanden) and a reciprocating (Bitzer) compressor was conducted experimentally. The refrigerant used was R600a (isobutane). READ MORE

4. 3. Techno-economic assessment of CO2 refrigeration systems with geothermal integration : a field measurements and modelling analysis

   University essay from KTH/Energisystem

   Author : Fabio Giunta; [2020]
   Keywords : CO2 Refrigeration; Supermarkets; Heat Recovery; Geothermal Storage; Energy Efficiency; Boreholes; Techno-Economic Assessment;

   Abstract : Several CO2 transcritical booster systems in supermarkets use the potential of integrating geothermal storage, enabling subcooling during warm climate conditions as well as being a heat source during cold climate conditions. First of all, field measurements of one of these systems located in Sweden were analysed with particular focus on the heat-recovery performance. READ MORE

5. 4. Evaluation of an economizersolution for a heat pump

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Elsa Forsgren; [2020]
   Keywords : ;

   Abstract : This thesis evaluates the performance of a heat pump intended to be used as an economizer. The idea is to use the heat from still hot refrigerant after the condenser in a larger heat pump, running on propane, as the heat source for the economizer pump. READ MORE

6. 5. Quenching a steel plate by water - impinging jets and different simultaneous flow rates

   University essay from Högskolan i Gävle/Energisystem och byggnadsteknik

   Author : Pablo Martinez; [2019]
   Keywords : Quenching; steel; plate; cooling; water- impinging jets; cooling rate; subcooling; temperature.;

   Abstract : Regarding the great importance of fast cooling in steel industry for the production processes, a deep understanding of heat transfer and fluid dynamics must be held. A steel plate is heated up until a maximum temperature of 700 ⁰ C to be the n cooled down seconds later by a configuration of multi ple impinging water jets. READ MORE