Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Configuration and testing of a reciprocating steam expander for medium-scale CSP applications
Thesis (MEng) -- Stellenbosch University, 2023.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
| Published: |
Stellenbosch : Stellenbosch University
2023
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613739822350336 |
|---|---|
| access_status_str | Open Access |
| author | Egberink, Ross Cameron |
| author2 | Meyer, C. J. |
| author_browse | Egberink, Ross Cameron Meyer, C. J. |
| author_facet | Meyer, C. J. Egberink, Ross Cameron |
| author_sort | Egberink, Ross Cameron |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2023. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/127115 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:40:56.191Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/127115 Configuration and testing of a reciprocating steam expander for medium-scale CSP applications Egberink, Ross Cameron Meyer, C. J. McGregor, C. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Solar energy Renewable energy sources Solar thermal energy UCTD Thesis (MEng) -- Stellenbosch University, 2023. ENGLISH SUMMARY: Concentrated solar power (CSP) plants could provide a solution to the lack of electrical power in many African countries. However, traditional power block setups are not viable for small- to medium-scale CSP plants. There is a need for a low-cost, robust steam expander that is able to reduce the capital cost of small- to medium-scale CSP plants. This project investigates the conversion of an internal combustion engine into a reciprocating steam expander. Steam expanders have many benefits over traditional small-scale turbines. The benefits include the ability to operate at grid frequency, the ease of maintenance and repair by personnel without extensive knowledge and training, and the ability to operate at a wide range of operating conditions. A Detroit 4-71 diesel engine was converted into a reciprocating steam expander. A cylinder head was appropriately designed for the expander, and it was fitted with an electromagnet valve mechanism to achieve a variable cut-off ratio. A thermodynamic model was developed for the uni-flow steam expander process. The model was used to aid in the design of a prototype steam expander. The steam expander was tested at 500 rpm using 11 bar compressed air as the working fluid. The expander achieved a maximum usable power output of 9:34 kW at 500 rpm. The electromagnet valve catch was tested by increasing the cut-off ratio from 65% to 75% which resulted in an increase in expander power output of around 20%. The expander is estimated to output 86:59 kW at 1500 rpm once configured with a condensing unit and operating with 11 bar saturated steam. AFRIKAANSE OPSOMMING: Gekonsentreerde sonkrag (CSP) aanlegte kan ’n oplossing bied vir die gebrek aan electriese krag in baie Afrika-lande. Tradisionele kragblokopstellings is egter nie lewensvatbaar vir medium tot kleinskaalse CSP aanlegte nie. Daar is ’n behoefte aan ’n laekoste, robuuste stoomuitbreider wat die kapitaalkoste van klein- tot medium-skaalse CSP aanlegte kan verlaag. Hierdie projek ondersoek die omskakeling van ’n binnebrandenjin na ’n resiprokerende stoomuitbreider. Stoomuitbreiders het baie voordele bo tradisionele kleinskaalse klein skaalse turbines. Die voordele sluit in die vermoe om teen netwerkfrekwensie te werk, die gemak van instandhouding en herstel deur personeel sonder uitgebreide kennis en opleiding, en die vermoe om teen ’n wye reeks bedryfstoestande te werk. ’n Detroit 4-71 dieselenjin is omskep in ’n resiprokerende stoomuitbreider. ’n Silinderkop is toepaslik ontwerp vir die uitbreider, en dit was toegerus met ’n elektromagneetklepmeganisme om ’n veranderlike afsnyverhouding te bewerkstellig. ’n Termodinamiese model is ontwikkel vir die eenvloei stoomuitbreidingsproses. Die model is gebruik met die ontwerp van ’n prototipe stoomuitbreider. Die stoomuitbreider is getoets teen 500 rpm met behulp van 11 bar saamgeperste lug as die vloeier. Die uitbreider het ’n maksimum bruikbare kraguitset van 9:34 kW teen 500 rpm behaal. Die elektromagneetklepvanger is getoets met ’n afsnyverhouding wat van 65% tot 75% toegeneem het en het gelei tot ’n toename in uitbreiderkraguitset van ongeveer 20%. Die uitbreider sal na raming 86:59 kW teen 1500 rpm lewer sodra dit met ’nkondenseringseenheid toegeras word en met 11 bar versadigde stoom werk. Masters 2023-03-02T08:29:01Z 2023-05-18T07:05:01Z 2023-03-02T08:29:01Z 2023-05-18T07:05:01Z 2023-03 Thesis http://hdl.handle.net/10019.1/127115 en_ZA Stellenbosch University xvi, 126 pages : illustrations, includes annexures application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Solar energy Renewable energy sources Solar thermal energy UCTD Egberink, Ross Cameron Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title | Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title_full | Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title_fullStr | Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title_full_unstemmed | Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title_short | Configuration and testing of a reciprocating steam expander for medium-scale CSP applications |
| title_sort | configuration and testing of a reciprocating steam expander for medium scale csp applications |
| topic | Solar energy Renewable energy sources Solar thermal energy UCTD |
| url | http://hdl.handle.net/10019.1/127115 |
| work_keys_str_mv | AT egberinkrosscameron configurationandtestingofareciprocatingsteamexpanderformediumscalecspapplications |