Combined heating, cooling and power systems in Thai hotels | |
| Author | Ekawit Meteejaroenwong |
| Call Number | AIT Thesis no.ET-12-10 |
| Subject(s) | Hotels--Environmental aspects--Thailand--Bangkok Hotels--Energy consumption--Thailand--Bangkok |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Energy |
| Publisher | Asian Institute of Technology |
| Abstract | Hotels are commercials building that operate 24 hour a day and 365 days a year. They consume energy for lighting, cooling and heating, which could be from different sources. To improve the efficiency of energy delivery, Combined Heating, Cooling and Power (CHCP) system is an important alternative, as it can help reduce the total energy used in the hotel, and provide all final energy needs of the hotel. This study was aimed to identify the suitable prime mover (gas engine or gas turbine) of the CHCP system considering options of electricity export/non export to the grid among others considering the minimum cost. Financial parameters (payback period, NPV and IRR) and greenhouse gas (GHG) emission reduction by the considered CHCP systems were also evaluated. Load data from two Bangkok hotels, namely electricity, cooling and heating, were used for the simulation. The CHCP system uses natural gas as a primary fuel in the two cases studied of the hotels. This study uses linear programming method to obtain the optimal sizing for the CHCP system. The constraint equations were demand constraint, capacity constraint, energy balance constraint and non-negativity constraint. This study evaluated two options of CHCP system -CHCP system exports/does not export electricity to the grid. Two scenarios were also considered. First, the proposed system is a new project and the hotels need to install all equipment, while in the second scenario, is the hotels use equipment that are already installed. The results of the study show the following: New project: The CHCP system with gas engine as a prime mover and exporting electricity to the grid is the most suitable option for both the hotels under study. The payback period for the two hotels was about 5 years, while NPV at 10% discount rate was $11,049,267 and $7,505,310. The IRR for the two hotels was 22.3% and 23.1% respectively, while the GHG emission reductions was14,061 and 9,116 ton of CO2 per year respectively Improvement project: The CHCP system with gas engine as a prime mover and not exporting electricity to the grid is attractive for both hotels. The payback period for the two hotels was about 2.9 years. The NPV at 10% discount rate was $6,610,535 and $4,471,407, and the IRR was 39.6% and 38% respectively. The CHCP system can reduce GHG emissions around 4,872 tons and 3,358 tons of CO2. If similar hotels in Bangkok install the CHCP system, the potential to reduce GHG emissions is around 102,754 –125,598 ton of CO2 per year. |
| Year | 2012 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Kumar, Sivanappan; |
| Examination Committee(s) | Salam, Abdul P.;Marpaung, Charles O.P.; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2012 |