Page 640 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)
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The City & Guilds Textbook: Plumbing Book 1




                                                               Vapour             Vapour
                                                                       Compressor








                                              Evaporator           Fan                          Condenser










                                                          Liquid & vapour         Liquid
                                                                     Expansion valve
                                              p  Figure 10.6 Heat pump theory




                                                    Services                    Domestic
                                                    distribution                properties  Flow     Return







                                                    Stack
                                                                                                 Electrical distribution station
                                                  Heat exchanger
                                                                                                       Power supply

                                                                       Control
                                                                       panel
                                                                                                   Thermal
                                                                                                   store





                                                Gas
                                                turbine


                                                                                                         Transformer
                                                                            Generator
                                                Natural gas supply
                                            p  Figure 10.7 A CHP system


                                            l  Combined cooling, heat and power (CCHP): very similar to CHP, combined
                                               cooling, heat and power uses the excess heat from electricity generation to
                                               achieve additional building heating or cooling.


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