## 3 A Summary of the Research on Integrated Building and Energy Systems  
As per the study of [PERSON], [PERSON], and [PERSON] [3], 2007, \"Note that, the use of solar energy in conjunction with near-surface geothermal energy combines the benefits of two proven processes--solar technology and the use of geothermal heat--in an amazingly simple form. Numerous instances from all climatic zones demonstrate the effectiveness of this technology, which is very cost-effective in terms of both manufacture and operation. Further study and improvement are required to optimize and be able to \"compute\" this building technology. Gaining control over the calculation of heat exchange processes and optimizing insulation thicknesses are the goals of additional research. The Isomax building technology, however, may already be used in an efficient and environmentally responsible manner thanks to prior expertise\". As per the study of Guinea [4], 2008, \"Reports that a graduate engineer and scientist from Luxembourg, [PERSON] proposed two interesting ideas in his ISOMAX system. The first involves the creation of a temperature-controlled surface (thermal barrier) between two insulation layers in the building envelope. This efficiently uses subsurface temperatures that cannot be used directly for heating inside the building and effectively controls heat flow via the walls and roof covering. Thus, it is simple and effective to utilize the significant heat that builds up in our environment as \"basement temperature\" to reduce the transmission losses in the building envelope. The second idea involves the direct underground collection of solar energy and its selective storage in certain underground layers. This technique does not use conventional thermal solar panels collection but replaces them with a simple plastic pipe buried under the roof covering. In this case, the absorbed solar energy is used directly for storage in the soil without using the usually insulated water tanks. The storage capacity of a ground heat storage tank is determined by the specific heat capacity and the weight of the material used as a storage tank\". As per the study of [PERSON] [5], 2010, \"This document presents general guidelines for the required cooling performance of an entire office building using thermally activated building systems (TABS). On-site measurements have been carried out to obtain the required cooling performance of the whole building and individual zones. In addition, the rooms' indoor climatic conditions and the TABS' surface temperatures were measured. The measured data were used to analyze the predictive performance of the simulation model. To obtain general guidelines for the required cooling performance of a standard office building, whole building simulations were used to determine the effect of variable internal heat gains and different window sizes\". Figure 7: ISOMAX system control [1,2]. As per the study of [PERSON] and [PERSON] [6], 2011, \"Present a concept of an indirect heating and cooling technique of residential buildings driven by solar thermal radiation called Thermal Barrier (TB), which is composed of polypropylene U-pipes located inside of external walls. Fluid flows inside a U-pipe system with a variable mass flow rate and variable supply temperature. This creates a semi-surface parallel to wall surfaces and a spatially averaged temperature almost constant and close to the reference temperature of 17 \({}^{\circ}\)C all year round. The TB technique is used to stabilize and reduce heat flux normal to the wall surface and maintain its direction from internal air out to ambient air throughout the year. The main intention of this paper is to investigate the thermal performance and stability of the Thermal Barrier. A 3D FE model of a prefabricated external wall component containing a TB U-pipe system with flowing fluid is developed using the FE code of ABAQUS. A novel SVC control system supports the FE analysis implemented in FORTRAN to simulate real working conditions.