Deliverable D4.9 GEOTeCH Project. Plug & play systems design, selection and installation guidelines

This document is the deliverable D4.9 ‘Plug & Play system design, selection and installation guidelines’ which describes the creation of a simple design guide for the Plug & Play Dual Source Heat Pump system designed in the work-package (WP4). One of the key aims of the GEOTeCH project is to develop a ‘plug and play’ (P&P) small scale heat pump system solution that is adaptable to a wide range of small buildings in a range of climatic and ground conditions. This adaptability is attained by the hybrid nature of the heat pump and the development of a robust control system. The control system was developed in D4.7 (T.4.2.3) by modelling the whole system operation in a wide range of conditions. Prior to this, the integrated system models developed in WP4 (T4.2.2) were validated on a comparison using a few selected benchmark cases. In D4.7 it was presented that there is good accordance between the UPVLC model and the GROENHOL borehole model. The GROENHOL model, that performs a single calculation of one complete year in less than 30 seconds, can be run for a range of standard climate situations and building types connected to the benchmark run for the P&P heat pump system. By running the benchmark model for the control parameters, with different input parameters (building loads, climate conditions, geothermal characteristics of the subsurface) defined by geospatial location and integrating these into a matrix analysis, a simple method for predicting the required length of the Borehole Heat Exchangers which should be connected to the Heat Pump Module can be produced for a range of standard climate conditions and building types. Main results achieved are presented in this deliverable in the form of a matrix that will be incorporated into a design guide, which will allow for an easy selection of the required borehole heat exchanger length on the basis of the amount of ground source selection from the control parameters and the specific ground characteristics.