Sökning: "natural refrigerant"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden natural refrigerant.

1. 1. Status Mapping of tank to grave management of Low-GWP refrigerants.

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Sandra Parra Gimeno; [2023]
   Nyckelord :Refrigerant; Blends; Synthetic low-GWP refrigerant; Natural refrigerant; Global Warming Potential GWP ; Tank-to-grave; Interviews.; Köldmedier; Blandning; Globalt uppvärmningspotential GWP ; Låg-GWP köldmedier; Naturligt köldmedier; installation till destruktion; Intervjuer.;

   Sammanfattning : Refrigeration plays a vital role today in various residential, commercial, and industrial processes, requiring refrigerants to facilitate the cooling or heating processes. Over time, refrigerants have undergone significant changes to meet technological, social, environmental, and economic needs. LÄS MER

3. 2. Refrigerant Selection for District Heating’s Large-scale Heat Pumps

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Görkem Balyaligil; [2023]
   Nyckelord :heat pump; district heating; refrigerant; natural; synthetic;

   Sammanfattning : The global demand for heat as the primary source of final energy underscores the urgency of decarbonizing the heating sector to foster sustainability. Heat pumps are crucial in achieving sustainability, particularly in district heating applications, offering efficient centralized heating solutions. LÄS MER

4. 3. Effects of Immiscible Compressor Oil in a Flooded PSHE Evaporator : A Visual Study Approach

   Master-uppsats, KTH/Energiteknik

   Författare :Joel Blomfelt; [2022]
   Nyckelord :;

   Sammanfattning : This paper deals with heat transfer in plate evaporators, with a focus on the effects caused by carried-over compressor oil ending up in the heat exchanger. A common standpoint in literature regarding the effect of immiscible oil contamination, in for example an ammonia PHE evaporator, is that the oil can accumulate as a layer on the plate surface causing an additional thermal conduction resistance. LÄS MER

5. 4. Performance Analysis of CO2 Heat Pumps in Different Applications

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Jaykumar Thanggavelu; [2022]
   Nyckelord :CO2 Heat pump; COP; District heating; commercial buildings; residential buildings; field measurement data; Propane; Ammonia; R-134a; CO2 Värmepump; COP; Fjärrvärme; kommersiella byggnader; bostadshus; fältmätningsdata; Propan; Ammoniak; R-134a;

   Sammanfattning : This study focuses on researching the performance of CO2 heat pumps in different real-time applications and in some studies, it compares the performance to synthetic and other natural refrigerants based on heat pump data provided from buildings. The research on the performance of the CO2 heat pump is performed based on Sweden's climatic conditions. LÄS MER

7. 5. CO2 Refrigeration withIntegrated Ejectors : Modelling and Field Data Analysis ofTwo Ice Rinks and Two Supermarket Systems

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :SIMON FEHLING; [2021]
   Nyckelord :Vapor Ejector; Liquid Ejector; Field Data Evaluation; Modelling; Refrigeration; CO2; Ice Rink; Supermarket; Heat Recovery; Ångejektor; Vätskeejektor; Fältmätdata; Modellering; Kylteknik; CO2; Isbana; Livsmedelsbutik; Värmeåtervinning;

   Sammanfattning : With the increasing importance of CO2 as natural refrigerant with low Global Warming Potential(GWP) ejectors have been used in a number of recent installations to recover expansion work atthe high operating pressures of these systems. In colder climates, this is particularly seen in combinationwith heat recovery due to the high compressor discharge pressures. LÄS MER