| Author | Khan, Kamrujjaman |
| Call Number | AIT Thesis no.ET-06-15 |
| Subject(s) | Heat pumps--Simulation methods--Evaluation
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The heat pump is a system that receives heat from low temperature source and delivers it to medium/high temperature without rotating equipment. Solid adsorption heat pump upgrades heat by using working pairs (zeolite-water) and adsorber in place of compressor or regenerator. Adsorption heat pumps with two adsorbers which are thermally powered and quasi continuously working are studied. Simulation was carried out using MATLAB for single and double effect adsorption chemical heat pump system. Accordingly experimental study was conducted to compare and validate the theoretical studies. The simulation study of the system performance included temperature profile of the adsorber, evaporator and condenser, temperature lift, coefficient of amplification, coefficient of performance, power production of heating, specific heat production and exergetic efficiency. From both theoretical and experimental studies performance indicators temperature lift, COA, COP, PPH and efficiency of the system was calculated by changing the most influential parameters like low level (evaporation) temperature, high level (heat source) temperature, cycle time etc. 1.For single effect system the maximum temperature lift could be possible around 35-45 °C theoretically and 20-25 °C experimentally for the evaporation temperature of 55-60 °C and regeneration temperature of 175-190 °C. The maximum COA could be found in this case is 78 and power production of heating (PPH) is 1. 12 kWM. COP obtained from the system is 1.12 and exergetic efficiency is more than 73%. Therefore, with the higher regeneration temperature operating up to certain maximum limit of 170-190 °C in line with evaporation temperature of 55-60 °C maximum possible COA, PPH, COP and efficiency can be obtained from this type of heat pump system. For double effect system the maximum temperature lift is around 40-55 °C theoretically and 25-35 °C experimentally for the evaporation temperature of 55-65 °C and regeneration temperature of 190-220 °C. The maximum theoretical COA, COP and exergetic efficiency (11) could be possible 2.44, 1.35 and 78% respectively and those from experimental are 1.76, 0.96 and 72% respectively. The comparison has been made over single effect and other types of heat pump system performance, where double effect system pronounced its significance. From both theoretical thermodynamic model analysis and experimental observation as well as compared with earlier studies for the same it can be concluded that double effect system produces higher COA, COP and system efficiency with the same operating conditions |
| Year | 2006 |
| 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, S.; |
| Examination Committee(s) | Surapong Chirarattananon ;Dutta, Animesh; |
| Scholarship Donor(s) | Government of France /AIT Fellowship ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |